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Manual Creation of a Mirror in WSFC

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Creating a DataKeeper Volume Resource in WSFC » Manual Creation of a Mirror in WSFC

Wait until the mirrors are in the Mirroring state. Create an Empty Application. Open the Microsoft Windows Failover Cluster GUI Right-click on Services and Applications (in Windows 2012, right-click on Roles) Expand More Actions (not in Windows…

Mirror Creation and Cluster Configuration

DataKeeper Cluster Edition Technical Documentation » User Guide » Using Microsoft iSCSI Target With DataKeeper on Windows 2012 » Mirror Creation and Cluster Configuration

Create your DataKeeper volumes and your cluster. See Creating a DataKeeper Volume Resource in WSFC for reference. *IMPORTANT: The iSCSI Target Role only supports DataKeeper Volumes that are mirrors of Simple Volumes placed on Basic Disks. If any of your mirrors are…

Creating a Mirror

DataKeeper Cluster Edition Technical Documentation » User Guide » Configuring Mirrors » Creating a Mirror

Before creating a mirror, ensure the following: You have created a job to hold the mirror. The volume on both the source and target systems must be of the NTFS file system type. The target volume must be greater than or equal to the size of the source…

Deleting a Mirror

DataKeeper Cluster Edition Technical Documentation » User Guide » Working With Mirrors » Deleting a Mirror

This action discontinues replication and removes the mirror from the associated job. The target volume is unlocked and made fully accessible. Select the job that contains the mirror you want to delete. Right-click on the mirror and choose Delete Mirror or…

Deleting a Mirror

DataKeeper Cluster Edition Technical Documentation » FAQs » Deleting a Mirror

Question What actually happens when you delete a mirror? Answer The data remains on both sides, but the target and source data are no longer synchronized. The target volume is unlocked and made fully accessible.

Creating a DataKeeper Volume Resource in WSFC

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Creating a DataKeeper Volume Resource in WSFC

Automatic Creation of a Mirror in WSFC Use the SIOS DataKeeper GUI to configure a mirror. At the completion of the mirror creation operation, the following dialog box will pop up which will allow you to automatically add the mirror as a DataKeeper volume…

WSFC 2012 Cluster Creation Default Setting Issue

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Windows Server 2012 Specific Issues » WSFC 2012 Cluster Creation Default Setting Issue

Description During the cluster creation process in Windows Server 2012, Microsoft has added a new option to automatically consume all disks and manage them through Failover Clustering. As a result, any attempts to create a mirror in DataKeeper will fail and a message…

Switching Over a Mirror

DataKeeper Cluster Edition Technical Documentation » User Guide » Working With Jobs » Switching Over a Mirror

The Switchover Mirror function enables you to switch over all the mirrors in a job or just one of the mirrors in a job. A “mirror” includes all variants for mirrors such as standard single-target replication and complex geometries such as multi-target…

Safe Creation of a Shared-Storage Volume Resource

DataKeeper Cluster Edition Technical Documentation » User Guide » Configuring Mirrors » Safe Creation of a Shared-Storage Volume Resource

DataKeeper allows mirrors to be created on shared volumes where more than one system has access to the same physical storage. The shared volume can be on the source side of the mirror or on the target side. Note: Dynamic disks are not supported with Shared Storage…

Creation of iSCSI Virtual Disks

DataKeeper Cluster Edition Technical Documentation » User Guide » Using Microsoft iSCSI Target With DataKeeper on Windows 2012 » Creation of iSCSI Virtual Disks

Perform the following on the primary server, wherever the iSCSI Target server is online at the moment. From Server Manager, navigate to File and Storage Services and select iSCSI. Click on the link “To create an iSCSI virtual disk, start the New iSCSI Virtual Disk…

Creating Other Server Resource in WSFC

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Creating Other Server Resource in WSFC

When creating an Other Server resource in WSFC, you will be prompted for a storage resource (DataKeeper resource) twice. You will check the first one, but do not need to check the second dialog. Click the “checkbox” for the first dialog “Select…

Inability to Create a Mirror

DataKeeper Cluster Edition Technical Documentation » FAQs » Inability to Create a Mirror

Question Why can’t I create a mirror? Answer The common cause of this problem is that the volume on either source or target is in use by another process. Stop the process that is accessing the volume and try again. The SIOS DataKeeper software requires…

Mirror Properties

DataKeeper Cluster Edition Technical Documentation » User Guide » Working With Mirrors » Mirror Properties

Select a job in the Job Summary pane and right-click to choose Mirror Properties. This dialog displays the following information about the job, source and target systems: Job Name State (current state of the job; for example, Active) Source…

Windows Server 2012 Default Information Missing During Mirror Creation

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Windows Server 2012 Specific Issues » Windows Server 2012 Default Information Missing During Mirror Creation

Creating Mirrors with Multiple Targets The first issue is during mirror creation in a multi-target configuration. In the final step, the user is prompted for secondary relationship information. In previous OS versions, a default Source IP is provided on this…

Mirror State Definitions

DataKeeper Cluster Edition Technical Documentation » Using EMCMD with SIOS DataKeeper » Mirror State Definitions

The following numbers are used by the system to internally describe the various states. They are used by EMCMD, and they are also the state numbers found in event log entries. -1: Invalid State 0: No Mirror 1: Mirroring 2: Mirror is resyncing 3: Mirror is…

Change Mirror Endpoints

DataKeeper Cluster Edition Technical Documentation » FAQs » Change Mirror Endpoints

Question Can I change the mirror endpoints (IP address) of a system currently associated with an existing mirror? Answer Yes. The EMCMD called CHANGEMIRRORENDPOINTS allows you to change the endpoints of a mirrored volume that is configured on 3 nodes or fewer. (If…

Change Mirror Type

DataKeeper Cluster Edition Technical Documentation » FAQs » Change Mirror Type

Question Can you change the mirror type of an existing mirror from Synchronous to Asynchronous or vice-versa? Answer Yes, you can change the mirror type using the EMCMD CHANGEMIRRORTYPE command.

Changing the Compression Level of an Existing Mirror

DataKeeper Cluster Edition Technical Documentation » User Guide » Working With Mirrors » Changing the Compression Level of an Existing Mirror

The compression level of the mirror is set during mirror creation and applies to that specific mirror only. To change the compression level of an existing the mirror, edit the properties of the mirror from within the DataKeeper GUI. Select the mirror and click on…

Failed to Create Mirror

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Failed to Create Mirror

User Interface – Failed to Create Mirror – Application Event Log Error/Message Logged in the Application Event Log: File: .\GuiThread.cpp Line: 3099 Attempt to connect to remote system REMOTESERVER failed with error 5. Please ensure that the local…

System Event Log – Create Mirror Failed in the GUI

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » System Event Log – Create Mirror Failed in the GUI

Error/Message Create Mirror Failed in the GUI. Description This can result if a vmms.exe program is holding on to volume and preventing SIOS DataKeeper from locking it.

Occasional Job Creation Failure

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Windows Server 2016 Specific Issues » Occasional Job Creation Failure

Occasionally, new job creation on Windows 2016 systems can fail. If this occurs, retry the create.

User Interface – Shows Only One Side of the Mirror

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » User Interface – Shows Only One Side of the Mirror

If the SIOS DataKeeper UI shows a volume as a source and its corresponding target as available or a volume as a target with the corresponding source volume as available, you can use the command line utility to force an update to the SIOS DataKeeper GUI or delete the…

Extending a Traditional 2-Node WSFC Cluster to a Third Node via DataKeeper

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Extending a Traditional 2-Node WSFC Cluster to a Third Node via DataKeeper

When replicating from a WSFC 2-node cluster to a third node via DataKeeper, the following tasks are required: Replace the existing WSFC physical disk resource with a DataKeeper volume resource that supports data replication. Change the quorum type to Node…

WSFC – MS DTC Resource Failure

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » WSFC – MS DTC Resource Failure

Error/Message The cluster resource host subsystem (RHS) stopped unexpectedly. An attempt will be made to restart it. This is usually due to a problem in a resource DLL. Please determine which resource DLL is causing the issue and report the problem to the resource…

WSFC 2008 R2 SP1 Procedure Change

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » WSFC 2008 R2 SP1 Procedure Change

Description When using WSFC 2008 R2 SP1, the procedure for Extending a Traditional 1×1 2-Node WSFC Cluster to a Shared-Replicated 3-Node Cluster has changed. The WSFC mmc GUI must not be used for adding a node that is hosting a DataKeeper shared…

Extending a Traditional 2-Node WSFC SQL Server Cluster to a Third Node via DataKeeper

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Extending a Traditional 2-Node WSFC SQL Server Cluster to a Third Node via DataKeeper

When replicating from a WSFC SQL Server 2-node cluster to a third node via DataKeeper, the following tasks are required: Replace the existing WSFC physical disk resource with a DataKeeper volume resource that supports data replication. Change the quorum type to…

WSFC 2012 Server Manager -- Incorrect Volume Display

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Windows Server 2012 Specific Issues » WSFC 2012 Server Manager -- Incorrect Volume Display

Description In Windows Server 2012, volume status can be viewed and volume manipulation can be performed within Server Manager > File and Storage Services > Volumes. However, when using DataKeeper volumes with cluster resources, this interface will not accurately…

Create a Mirror and Rename Job and Delete Job Actions Grayed Out

DataKeeper Cluster Edition Technical Documentation » FAQs » Create a Mirror and Rename Job and Delete Job Actions Grayed Out

Question Why are the Create a Mirror, Rename Job and Delete Job actions grayed out? Answer If a node that is part of the job is down, these actions will not be enabled.

User Interface – Failed to Create Mirror

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » User Interface – Failed to Create Mirror

User Interface – Failed to Create Mirror, Event ID 137 Error/Message Failed to create the mirror. Event Id: 137 System Event Log Unable to initialize mirror on the target machine. Volume Device: Source Volume: E Target Machine: 10.17.103.135 Target Volume:…

WSFC 2012 New File Server Type Not Supported

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Windows Server 2012 Specific Issues » WSFC 2012 New File Server Type Not Supported

Description Windows Server 2012 now offers two options for File Server Resources: File Server for General Use Scale-Out File Server for Application Data (NEW) The new option, “Scale-Out File Server for Application Data”, is not currently…

WSFC 2012 File Server Resource Manager Event Log Errors

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Windows Server 2012 Specific Issues » WSFC 2012 File Server Resource Manager Event Log Errors

Description In Windows 2012, if a File Server Role is created which uses one or more DataKeeper Volume resources and the File Server Resource Manager feature is enabled on the system, then a series of “SRMSVC” errors (ID 8228) will be received on the…

WSFC 2012 Failover Cluster Manager UI Defect (Delete Action Missing)

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Windows Server 2012 Specific Issues » WSFC 2012 Failover Cluster Manager UI Defect (Delete Action Missing)

Description On Windows Server 2012, the Microsoft Failover Cluster Manager UI tool has a defect. When a “right-click” is performed on a DataKeeper Volume resource from the Available Storage group, the drop-down action list does not appear. That action list would…

WSFC 2012 Server Manager -- DataKeeper “Disk” Not Shown as Clustered

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Windows Server 2012 Specific Issues » WSFC 2012 Server Manager -- DataKeeper “Disk” Not Shown as Clustered

There are some inconsistencies in how cluster disks are shown in the “Disks” display under Server Manager > File and Storage Services > Volumes > Disks. The following screen shot shows an iSCSI Shared Disk and two DataKeeper Volumes in a cluster. There is…

Relocation of Intent Log

DataKeeper Cluster Edition Technical Documentation » Understanding Replication » Relocation of Intent Log

To relocate the Intent Log (bitmap file), please perform the following on all servers involved: *LEAVE THE MIRROR IN THE MIRRORING STATE! Do not pause it and then move the bitmap file. If you have more than one DataKeeper mirror, move all mirrors to a single system…

Configuration of Data Replication From a Cluster Node to External DR Site

DataKeeper Cluster Edition Technical Documentation » Configuration » Configuration of Data Replication From a Cluster Node to External DR Site

Creating a Job

DataKeeper Cluster Edition Technical Documentation » User Guide » Getting Started » Creating a Job

If not already connected, connect to the server where you want to create a job. From the right Actions pane, select Create Job. The Job Wizard will prompt you for a Job Name and Description. Enter the appropriate information and select Create Job to…

Renaming a Job

DataKeeper Cluster Edition Technical Documentation » User Guide » Working With Jobs » Renaming a Job

Select the job in the left Console Tree pane of the main DataKeeper window. You can select Rename Job from the Actions pane or right-click on the selected job and choose Rename Job from the menu that displays. Enter the new Job Name and new Job…

Deleting a Job

DataKeeper Cluster Edition Technical Documentation » User Guide » Working With Jobs » Deleting a Job

Select the job in the left Console Tree pane of the main DataKeeper window. You can select Delete Job from the Actions pane or right-click on the selected job and choose Delete Job from the menu that displays. Select Yes to delete the selected job and…

Reassigning a Job

DataKeeper Cluster Edition Technical Documentation » User Guide » Working With Jobs » Reassigning a Job

Use the Reassign Job function to move an existing mirror from one job to another without deleting the mirror. Select the job from the middle Summary panel. Right-click and select Reassign Job or select Reassign Job from the Actions panel. Select an existing…

Replacing a Target

DataKeeper Cluster Edition Technical Documentation » User Guide » Working With Mirrors » Replacing a Target

When replacing the target volume, you must either break the mirror or delete the mirror in order to ensure a full resync of the data from the source volume to the target volume when the target volume is back in place. Though similar to the Pause and Unlock, breaking…

Using DKCE to Enable Multi-Site File Share Resources with Windows Server 2008R2 WSFC

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Using DKCE to Enable Multi-Site File Share Resources with Windows Server 2008R2 WSFC

Use the following procedure to protect File Share resources using SIOS DataKeeper and Microsoft Failover Cluster (WSFC). *IMPORTANT NOTE: DataKeeper Cluster Edition registration with Failover Cluster is automatic and occurs 60 seconds after detecting a Failover…

Installation of the iSCSI Target

DataKeeper Cluster Edition Technical Documentation » User Guide » Using Microsoft iSCSI Target With DataKeeper on Windows 2012 » Installation of the iSCSI Target

From the Server Manager menu, select “Add Roles and Features” from the “Manage” drop-down. Select the “Role-based or feature-based installation” option. From the list of servers presented, select the appropriate server. On the…

Extending a Single SQL Server Node to a Cluster

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Extending a Single SQL Server Node to a Cluster

This guide explains how to install a single SQL Server node and extend it to a clustered node. Please read this document carefully prior to installation. Planning Steps: Start with a Microsoft SQL Server standalone node, where data resides on the C drive. Note:…

Deploying DataKeeper Cluster Edition in AWS

Deploying DataKeeper Cluster Edition in AWS

*DISCLAIMER: While the following completely covers the high availability portion within the scope of our product, this is a setup “guide” only and should be adapted to your own configuration. *Please refer to the AWS Marketplace for a list of supported…

Deploying DataKeeper Cluster Edition in Azure

Deploying DataKeeper Cluster Edition in Azure

DEPLOYING MICROSOFT SQL SERVER 2014 FAILOVER CLUSTERS IN AZURE RESOURCE MANAGER (ARM) Before beginning, make sure you read the DataKeeper Cluster Edition Release Notes for the latest information. It is highly recommended that you read and understand the DataKeeper…

Connecting to a Server

DataKeeper Cluster Edition Technical Documentation » User Guide » Getting Started » Connecting to a Server

Use this dialog to connect to the server of your choice. You may enter the IP address, system NetBIOS name or the full system domain name for the server. Click Connect to select it.

Disconnecting from a Server

DataKeeper Cluster Edition Technical Documentation » User Guide » Getting Started » Disconnecting from a Server

Use this dialog to disconnect from a server. You may use this option if you no longer wish to view the server in the Administration Window. From the list of servers, select the server(s) that you wish to disconnect from and click Disconnect.

Adding a Shared System

DataKeeper Cluster Edition Technical Documentation » User Guide » Working With Shared Volumes » Adding a Shared System

To add a shared system to either the source or target side of a mirror, you must be connected to that system. You can connect to the system prior to starting the Manage Shared Volumes dialog, or you can click Connect to Server from within the dialog. In either case,…

Removing a Shared System

DataKeeper Cluster Edition Technical Documentation » User Guide » Working With Shared Volumes » Removing a Shared System

To remove a shared system from either side of the mirror, bring up the Manage Shared Volumes dialog and uncheck the Include box for the system to be removed. When you click Done, the job will be updated so that the system is not part of the job. Warning: If a shared…

Windows Server 2012 -- Simultaneous Move of Multiple Clustered File Server Roles Can Result in DataKeeper Switchover Failures

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Windows Server 2012 Specific Issues » Windows Server 2012 -- Simultaneous Move of Multiple Clustered File Server Roles Can Result in DataKeeper Switchover Failures

Description If more than one File Server role is created in Failover Clustering, each of which is using one or more DataKeeper Volume resources for storage, errors can occur if two or more roles are manually moved from one node to another simultaneously. In some…

Reclaim Full Capacity of Target Drive

DataKeeper Cluster Edition Technical Documentation » FAQs » Reclaim Full Capacity of Target Drive

Question How do I reclaim the full capacity of my target drive when I no longer need it for mirroring? Answer The file system on the target drive is overlaid by SIOS DataKeeper, thereby making it smaller than the actual partition size. Although Disk Management…

Windows Server 2012 MMC Snap-in Crash

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Windows Server 2012 Specific Issues » Windows Server 2012 MMC Snap-in Crash

Description When using the DataKeeper user interface (MMC Snap-in) on Windows Server 2012, the mmc.exe process may crash unexpectedly due to an internal .Net or Windows Presentation Foundation (WPF) issue. The error may show up on the screen and/or the event…

Extending a Clustered DataKeeper Volume to a Node Outside the Cluster

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Extending a Clustered DataKeeper Volume to a Node Outside the Cluster

DataKeeper Volume cluster resources can be extended to a DR Node for Disaster Recovery purposes. In the event of a complete failure of all systems in the cluster, data will be accessible on the DR Node (referred to as the “DR Node”). Here you will find instructions…

Extending a Traditional 2-Node Cluster to a Shared-Replicated Configuration

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Extending a Traditional 2-Node Cluster to a Shared-Replicated Configuration

Add a Shared Node Using Windows Server 2008R2 or 2012 When using Windows Server 2008R2 or 2012, a 1×1 2-Node replicated cluster using DataKeeper Volumes can be extended to a 2×1 shared and replicated 3-Node cluster by using either of the following…

Removing a Clustered DataKeeper Volume

DataKeeper Cluster Edition Installation Guide » Installation » Removing a Clustered DataKeeper Volume

To remove a Clustered DataKeeper Volume follow these steps: Launch the Failover Cluster Manager. Select the Role and related DataKeeper Storage. Remove the DataKeeper Volume resource from the Role. This will move the DataKeeper Volume resource to the…

WSFC 2012 File Shares Cannot be Created for File Server Role Using Server Manager or Failover Cluster Manager

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Windows Server 2012 Specific Issues » WSFC 2012 File Shares Cannot be Created for File Server Role Using Server Manager or Failover Cluster Manager

Description Once a cluster File Server role is created, neither Server Manager nor Failover Cluster Manager can be used to initially create the share. Suggested Action Microsoft Article 2804526 provides a high level overview of several WSFC Server 2012 issues…

WSFC 2016 File Shares Cannot be Created for File Server Role Using Server Manager or Failover Cluster Manager

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Windows Server 2016 Specific Issues » WSFC 2016 File Shares Cannot be Created for File Server Role Using Server Manager or Failover Cluster Manager

Description Once a cluster File Server role is created, neither Server Manager nor Failover Cluster Manager can be used to initially create the share. Suggested Action Microsoft Article 2804526 provides a high level overview of several WSFC Server 2016 issues…

Setup of iSCSI Initiator on Windows 2012

DataKeeper Cluster Edition Technical Documentation » User Guide » Using Microsoft iSCSI Target With DataKeeper on Windows 2012 » Setup of iSCSI Initiator on Windows 2012

Once the virtual disks/targets are created, each of the cluster servers must initiate a connection to them via Microsoft’s iSCSI Initiator. From “Administrator Tools” in “Server Manager”, start “iSCSI Initiator”. Select the “Targets” tab and…

Awareness of Windows Filenames and Directory Names

DataKeeper Cluster Edition Technical Documentation » FAQs » Awareness of Windows Filenames and Directory Names

Question Is SIOS DataKeeper aware of Windows filenames and directory names? Answer SIOS DataKeeper is implemented with a Windows kernel mode filter driver that sits above the physical disk driver but below the file system. As a result, the SIOS DataKeeper driver…

Switchover in an N-Shared x N-Shared Configuration

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Switchover in an N-Shared x N-Shared Configuration

In a multi-shared storage environment between two sites (as shown in the diagram below), each server in each site has access to the storage being shared between the servers at that site. When a DataKeeper mirror is created, one server in each site will be designated…

Duplicate IP Addresses Disallowed Within a Job

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Restrictions » Duplicate IP Addresses Disallowed Within a Job

A DataKeeper job contains the endpoint information for all mirrors that are part of the job. This information includes the host name, IP address, and drive letter of each mirror endpoint. Within a job, an IP address cannot be duplicated on more than one node. For…

Initial Synchronization of Data Across the LAN or WAN

DataKeeper Cluster Edition Technical Documentation » Configuration » WAN Considerations » Initial Synchronization of Data Across the LAN or WAN

When replicating large amounts of data over a WAN link, it is desirable to avoid full resynchronizations which can consume large amounts of network bandwidth and time. DataKeeper avoids almost all full resyncs by using its bitmap technology. However, the initial…

Server Login Accounts and Passwords Must Be Same on Each Server in the Cluster

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Server Login Accounts and Passwords Must Be Same on Each Server in the Cluster

The DataKeeper GUI cannot connect to the target server in a cluster if server Login Accounts and Passwords are different on each server. Error Message An Error Code 1326 will appear in the Application log (Note: The Error Code may also be a 2 with Event ID…

Known Issues and Workarounds

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds

Included below are known issues open against DataKeeper and DataKeeper Cluster Edition as well as possible workarounds and/or solutions. __________________________________________________________________________________________________________________ Access to…

Clustering

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering

Running chkdsk on Cluster Volumes during Cluster Volume Online Creating a DataKeeper Volume Resource in WSFC Manual Creation of a Mirror in WSFC DataKeeper Volume Resource Health Check DataKeeper Volume Resource Private Properties Extending a Clustered DataKeeper…

DataKeeper Cluster Edition Quick Start Guide

DataKeeper Cluster Edition Quick Start Guide

This topic provides step-by-step instructions for installing and configuring DataKeeper Cluster Edition. The series of steps includes links to the documentation that describe each step in detail. Prerequisites and Installation Read the DataKeeper Cluster Edition…

DataKeeper Troubleshooting

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting

The topics in this section contain important information about known issues and restrictions offering possible workarounds and/or solutions. ________________________________________________________________________________________________________________ Known Issues…

Windows Server 2012 Specific Issues

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Windows Server 2012 Specific Issues

For issues related to Windows Server 2012, see the following topics: __________________________________________________________________________________________________________________ Windows Server 2012 MMC Snap-in Crash Windows Server 2012 DataKeeper Switchover…

DataKeeper Cluster Edition Release Notes

DataKeeper Cluster Edition Release Notes

SIOS DataKeeper Cluster Edition Release Notes Version 8.6.5 (Version 8 Update 6 Maintenance 5) Released July 31, 2019 !IMPORTANT: If using Windows 2008 R2 SIOS DataKeeper includes a kernel-mode driver (ExtMirr.sys) which is signed with a SHA-256…

Error Messages Log

DataKeeper Cluster Edition Technical Documentation » FAQs » Error Messages Log

Question Where does DataKeeper log error messages? Answer DataKeeper events are logged in the Windows Application Event Log and the Windows System Event Log. Here is a breakdown of the messages you can look for. Application Event Log: Source = ExtMirrSvc –…

Resynchronization

DataKeeper Cluster Edition Technical Documentation » Understanding Replication » Resynchronization

SIOS DataKeeper Resynchronization SIOS DataKeeper performs resynchronization through the use of a bitmap file (intent log). It allocates memory that is used to keep track of “dirty” or “clean” blocks. When a full resync begins, SIOS DataKeeper…

Split-Brain Issue and Recovery

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Split-Brain Issue and Recovery

When protecting DataKeeper volume resources in Microsoft WSFC, if all nodes are included in the cluster split-brain recovery should occur automatically. However, in a Node Outside the Cluster scenario a split-brain may occur if network connectivity is lost to the DR…

REGISTERCLUSTERVOLUME

DataKeeper Cluster Edition Technical Documentation » Using EMCMD with SIOS DataKeeper » REGISTERCLUSTERVOLUME

EMCMD REGISTERCLUSTERVOLUME This command is used to register a DataKeeper protected volume in a WSFC cluster. The parameters are: This is the source system of the mirror. The drive letter of the volume you want registered.…

Access to Designated Volume Denied

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Access to Designated Volume Denied

If access to the designated volume is denied, then check whether you are attempting to create the mirror while other applications are accessing the volume. During Mirror Creation, the volumes must be locked on the target system for exclusive access by the SIOS…

Windows Server 2016 Specific Issues

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Windows Server 2016 Specific Issues

For issues related to Windows Server 2016, see the following topic: ____________________________________________________________________________________________________________________ Occasional Job Creation Failure WSFC 2016 File Shares Cannot be Created…

Non-mirrored Volume Resource

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Non-mirrored Volume Resource

A non-mirrored volume resource is a DataKeeper resource where no data is replicated to any node in the cluster. This resource type should only be used where the data is temporary and/or non-critical such as MS SQL Server tempdb space. In this case, when MS SQL restarts…

Using Microsoft iSCSI Target With DataKeeper on Windows 2012

DataKeeper Cluster Edition Technical Documentation » User Guide » Using Microsoft iSCSI Target With DataKeeper on Windows 2012

The following topics will guide you in setting up Microsoft iSCSI Target with DataKeeper via the user interface. *NOTE: This configuration is not supported in a VMware ESX environment. …

Installing and Using DataKeeper Cluster Edition on Windows Server 2008 R2 / 2012 Core Platforms

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Installing and Using DataKeeper Cluster Edition on Windows Server 2008 R2 / 2012 Core Platforms

Prepare the servers. Install Windows Server 2008 R2/2012 Core on two servers, configure IP, join a domain, configure firewall for remote administration, configure the server for remote access and install the Failover Cluster feature. Server Core Installation…

Volume Considerations

DataKeeper Cluster Edition Technical Documentation » Understanding Replication » Volume Considerations

SIOS DataKeeper primary and secondary systems have three types of volumes: system, non-mirrored and mirrored. During mirroring operations, system and non-mirrored volumes are not affected and the user has full access to all applications and data on these…

Configuring Mirrors

DataKeeper Cluster Edition Technical Documentation » User Guide » Configuring Mirrors

Creating a Mirror Creating Mirrors With Shared Volumes Safe Creation of a Shared-Storage Volume Resource Creating Mirrors With Multiple Targets Switchover and Failover with Multiple Targets

Switchover and Failover with Multiple Targets

DataKeeper Cluster Edition Technical Documentation » User Guide » Configuring Mirrors » Switchover and Failover with Multiple Targets

In a multiple target configuration, it is important to understand how DataKeeper mirrors will work in the following scenarios: Manual switchover to a target server Source server failure followed by a manual switchover to a target server Example: In the…

CREATEMIRROR

DataKeeper Cluster Edition Technical Documentation » Using EMCMD with SIOS DataKeeper » CREATEMIRROR

EMCMD CREATEMIRROR [options] This command creates a mirror between two machines, using the same drive letter on each. The parameters are: This is the IP address of the source system (see Note below). This is the drive letter…

Read and Write Operations

DataKeeper Cluster Edition Technical Documentation » Understanding Replication » Read and Write Operations

After the volume mirror is created and the two drives on the primary and secondary servers are synchronized, the following events occur: The system locks out all user access to the target volume; reads and writes are not allowed to the target volume. The source…

Upgrading SIOS DataKeeper Cluster Edition

DataKeeper Cluster Edition Installation Guide » Upgrading SIOS DataKeeper Cluster Edition

Upgrading DataKeeper Cluster Edition from previous versions of DataKeeper Cluster Edition is very straightforward. Simply run the installation process outlined below on all systems. The upgrade process stops the DataKeeper Service, copies the new files to the…

Performance Monitor Counters

DataKeeper Cluster Edition Technical Documentation » Understanding Replication » Performance Monitor Counters

SIOS DataKeeper provides counters that extend Performance Monitor with statistics about the status of mirroring on volumes. The counters are installed during the full installation of SIOS DataKeeper software. To access the counters, do the following: On a…

DataKeeper Volume Not Available as Cluster Resource Type

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » DataKeeper Volume Not Available as Cluster Resource Type

WSFC Server – The DataKeeper Volume is Not Available as a Cluster Resource Type After DataKeeper is Installed in a Microsoft WSFC Environment Error/Message The DataKeeper Volume is not available as a cluster resource type after DataKeeper is installed in a…

DataKeeper Target Snapshot

DataKeeper Cluster Edition Technical Documentation » User Guide » DataKeeper Target Snapshot

Overview DataKeeper’s target snapshot feature, integrated with both DataKeeper and DataKeeper Cluster Edition, is the process of creating point in time copies of replicated volumes allowing access to data on a standby cluster node without interrupting data…

N-Shared-Disk Replicated to One

DataKeeper Cluster Edition Technical Documentation » User Guide » Getting Started » N-Shared-Disk Replicated to One

This configuration allows you to replicate the shared volume(s) of the primary site to a remote system across the network. This configuration is ideal for providing local failover within the Primary Site and disaster recovery protection should the entire Primary…

Using SIOS DataKeeper Standard Edition To Provide Disaster Recovery For Hyper-V Virtual Machines

DataKeeper Cluster Edition Technical Documentation » User Guide » Using SIOS DataKeeper Standard Edition To Provide Disaster Recovery For Hyper-V Virtual Machines

Considerations When preparing a Hyper-V environment that spans subnets, subnetting may need to be taken into consideration for any applications that are running inside the virtual machine. Some applications “hard code” IP addresses into their…

CHANGEMIRRORTYPE

DataKeeper Cluster Edition Technical Documentation » Using EMCMD with SIOS DataKeeper » CHANGEMIRRORTYPE

EMCMD CHANGEMIRRORTYPE This command is used to change the mirror type of a mirror that is part of a DataKeeper job. Refer to the examples below. See Synchronous and Asynchronous Mirroring for information about the supported DataKeeper mirror types. …

Getting Started

DataKeeper Cluster Edition Technical Documentation » User Guide » Getting Started

Choose Your Configuration DataKeeper can be utilized in a number of different configurations to facilitate a number of different functions including: Provide a second physical copy of your data Extend an existing WSFC cluster to a remote DR site Eliminate…

New-DataKeeperMirror

DataKeeper Cluster Edition Technical Documentation » Using DKPwrShell with SIOS DataKeeper » New-DataKeeperMirror

This cmdlet is used to create a new DataKeeper mirror. Mirrors created with this cmdlet will be visible in the DataKeeper SnapIn (Reports > Server Overview). If a job exists that includes information that matches this mirror (systems, IP Addresses, Volumes, and Sync…

Compression

DataKeeper Cluster Edition Technical Documentation » Configuration » WAN Considerations » Compression

DataKeeper allows the user to choose the compression level associated with each mirror. Enabling compression can result in improved replication performance, especially across slower networks. A compression level setting of 3-5 represents a good balance between CPU…

Synchronous and Asynchronous Mirroring

DataKeeper Cluster Edition Technical Documentation » Understanding Replication » Synchronous and Asynchronous Mirroring

SIOS DataKeeper employs both asynchronous and synchronous mirroring schemes. Understanding the advantages and disadvantages between synchronous and asynchronous mirroring is essential to the correct operation of SIOS DataKeeper. Synchronous Mirroring With synchronous…

Pause and Unlock

DataKeeper Cluster Edition Technical Documentation » User Guide » Working With Mirrors » Pause and Unlock

This command pauses the mirror and unlocks the volume on the target system. You may wish to unlock the target volume in order to make a backup of the volume. Warning: Any writes to the target volume while it is unlocked will be lost when the mirror is…

DataKeeper Volume Resource Private Properties

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » DataKeeper Volume Resource Private Properties

A DataKeeper Volume resource includes several private properties that are used by DataKeeper Cluster Edition. Among these properties are: VolumeLetter (REG_SZ) – the volume letter that is replicated by DataKeeper and associated with this DataKeeper Volume…

Continue and Lock

DataKeeper Cluster Edition Technical Documentation » User Guide » Working With Mirrors » Continue and Lock

This action locks the volume on the target system and then resumes the mirroring process. While the mirror is paused, writes on the source system are recorded in the SIOS DataKeeper Intent Log. When the Continue and Lock operation occurs, these changed blocks –…

Using DataKeeper Cluster Edition to Enable Multi-Site Hyper-V Clusters

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Using DataKeeper Cluster Edition to Enable Multi-Site Hyper-V Clusters

Prerequisite Familiarity with Microsoft Windows Server, Microsoft Windows Failover Cluster Server Management and Hyper-V Virtual Management procedures and commands is highly recommended. Note: DataKeeper ClusterCluster Edition does not support Cluster Shared Volumes;…

GETVOLUMEDRVSTATE

DataKeeper Cluster Edition Technical Documentation » Using EMCMD with SIOS DataKeeper » GETVOLUMEDRVSTATE

EMCMD GETVOLUMEDRVSTATE This command retrieves the current state of the SIOS DataKeeper device driver. The parameters are: This can be either the source or the target systems. The drive letter of the volume you want to get the…

N-Shared-Disk Replicated to Multiple N-Shared-Disk Targets

DataKeeper Cluster Edition Technical Documentation » User Guide » Getting Started » N-Shared-Disk Replicated to Multiple N-Shared-Disk Targets

This is a complex configuration which combines the aspects of replicating a shared storage environment to multiple shared targets. Note that the number of systems in the Primary Site does not have to equal the number of systems in the Remote Site. Also note that…