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DataKeeper Service Log On ID and Password Selection

DataKeeper Cluster Edition Technical Documentation » Components » DataKeeper Service Log On ID and Password Selection

During a new DataKeeper installation setup, the user will be prompted for a DataKeeper Service Log On ID and Password. The DataKeeper Service uses authenticated connections to perform volume switchovers and make mirror role changes across multiple servers. The Log On…

DataKeeper Intent Log files on AWS Ephemeral Storage

DataKeeper Cluster Edition Technical Documentation » User Guide » DataKeeper Intent Log files on AWS Ephemeral Storage

DataKeeper systems that are running on AWS instances which are configured with local instance storage (i.e. ephemeral disks) can use the instance storage to store DataKeeper intent log files (i.e. bitmap files). It is important to be sure that when using AWS ephemeral…

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 –…

Event Log Considerations

DataKeeper Cluster Edition Technical Documentation » Administration » Event Log Considerations

It is important that SIOS DataKeeper be able to write to the Event Log. You should ensure that the Event Log does not become full. One way to accomplish this is to set the Event Log to overwrite events as needed: Open the Event Log. Right-click on System Log…

SIOS DataKeeper Intent Log

DataKeeper Cluster Edition Technical Documentation » Understanding Replication » SIOS DataKeeper Intent Log

SIOS DataKeeper uses an intent log (also referred to as a bitmap file) to track changes made to the source, or to target volume during times that the target is unlocked. This log is a persistent record of write requests which have not yet been committed to both…

DataKeeper Event Log Notification

DataKeeper Cluster Edition Technical Documentation » Administration » DataKeeper Event Log Notification

The Event Log notification is a mechanism by which one or more users may receive email notices when certain events occur. The Windows Event Log can be set up to provide notifications of certain DataKeeper events that get logged. *Note: This option is only available…

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. *Note: DataKeeper only supports bitmaps on NTFS filesystems. If the bitmaps are…

DKCE Service ExtMirrSvc Message Catalog

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Message Catalogs » DKCE Service ExtMirrSvc Message Catalog

Use Control F to search for a specific error code. Code Severity Message Cause/Action 17 Info The SIOS DataKeeper Service version %1 is starting. 18 Warning The SIOS DataKeeper Service has been…

Add a New Disk / DK Volume to an Existing Clustered SQL Role

DataKeeper Cluster Edition Technical Documentation » FAQs » Add a New Disk / DK Volume to an Existing Clustered SQL Role

When adding an additional disk to an existing cluster, the dependency relationship must be verified and configured manually based on the following requirements: The IP Address and the Disk Resource/DataKeeper Volume do not depend on anything The SQL Network Name…

How to create a DK Replicated Volume that has Multiple Targets via CLI

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » How to create a DK Replicated Volume that has Multiple Targets via CLI

The environment in this example looks like this: PRIMARY (10.0.2.100) – in AZ1 SECONDARY (10.0.3.100) – in AZ2 DR (10.0.1.10) – in a different Region *The Goals: • To create a synchronous mirror from PRIMARY to SECONDARY and an…

SQL FCI on Workgroup Clusters

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Restrictions » SQL FCI on Workgroup Clusters

According to Microsoft, SQL Server failover cluster instance (FCI) requires the cluster nodes to be domain joined. Due to this restriction SIOS DataKeeper Cluster Edition cannot be used to protect Microsoft SQL Server Failover Cluster Instances in a workgroup…

DKCE Driver ExtMirr – System Event Log Messages

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Message Catalogs » DKCE Driver ExtMirr – System Event Log Messages

Use Control F to search for a specific error code. Code Severity Message Cause Action 1 Info The SteelEye DataKeeper driver version 7.0 has started successfully. 2 Error The…

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…

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…

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…

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.

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…

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 –…

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…

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…

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…

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…

AWS Issues and Workarounds

DataKeeper Cluster Edition Technical Documentation » FAQs » AWS Issues and Workarounds

Question What is the best practice for shutting down clustered VMs in AWS? Answer If shutting down the primary source node, all cluster roles depending on a SIOS DataKeeper Volume Resource should be placed in the Offline state. Also make sure all mirrors are in the…

Running chkdsk on Cluster Volumes during Cluster Volume Online

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » Running chkdsk on Cluster Volumes during Cluster Volume Online

As of version 7.6 DataKeeper now runs chkdsk on all mirrored volumes prior to the volume being available for use. DataKeeper now creates a new flag DiskRunChkDsk in Windows Failover Clustering for each DataKeeper volume. The flag determines how chkdsk runs on each…

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. …

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…

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…

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.

Delete and Switchover Actions Grayed Out

DataKeeper Cluster Edition Technical Documentation » FAQs » Delete and Switchover Actions Grayed Out

Question Why are the Delete and Switchover actions grayed out on the DataKeeper User Interface? Answer If the volume is under clustering protection (Microsoft clustering or SIOS LifeKeeper clustering), these actions are disabled.

Stop Replication Between Source and Target

DataKeeper Cluster Edition Technical Documentation » FAQs » Stop Replication Between Source and Target

Question How do I stop the replication between the Source and Target volumes? Answer Replication occurs at the driver level and can only be stopped or interrupted by sending a command from the DataKeeper GUI or the DataKeeper command line (EMCMD) to the DataKeeper…

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…

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…

DataKeeper Volume cannot come Online after Network failure with clustered IP Address on Replication network

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » DataKeeper Volume cannot come Online after Network failure with clustered IP Address on Replication network

If you have multiple cluster networks, IP Addresses shouldn’t be set up on the same network that DataKeeper Volume resources are using for replication. Network errors may cause the DataKeeper mirror to go into a Paused state. If the network error also causes the…

Antivirus Software Exclusion List for LifeKeeper and DataKeeper for Windows

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Known Issues and Workarounds » Antivirus Software Exclusion List for LifeKeeper and DataKeeper for Windows

Description Antivirus software stops LifeKeeper from updating a LifeKeeper registry key. Antivirus software also quarantines LifeKeeper and DataKeeper executables causing LifeKeeper and DataKeeper not to run properly. Suggested Action List of things to exclude in…

Server 2012: Server Manager “File and Storage Services” Disk Status

DataKeeper Cluster Edition Technical Documentation » FAQs » Server 2012: Server Manager “File and Storage Services” Disk Status

Question Why are DataKeeper Volumes that are being used in a Microsoft Failover Cluster not shown by Server Manager as “Clustered”? Answer On Server 2012, the new Server Manager tool is capable of detecting if a complete “Disk” is being used by Failover…

Components

DataKeeper Cluster Edition Technical Documentation » Components

DataKeeper Components SIOS DataKeeper for Windows is comprised of the following components: DataKeeper Driver (ExtMirr.sys) – The DataKeeper Driver is a kernel mode driver and is responsible for all mirroring activity between the mirror…

Configuration

DataKeeper Cluster Edition Technical Documentation » Configuration

Requirements/Considerations The topics in this section identify several prerequisites to be aware of before implementing your DataKeeper…

Installing Core

DataKeeper Cluster Edition Installation Guide » Installation » Installing Core

Installing the DataKeeper Cluster Edition Core Software SIOS DataKeeper Cluster Edition uses the Flexera InstallShield product to provide a standard installation interface. A license must be obtained and installed for each server in the cluster. We recommend that you…

Most Common DKCE Installation Solutions

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » DKCE Common Solutions » Most Common DKCE Installation Solutions

The following are the most commonly requested installation related solutions. How do I get and install my license(s)? Where can I get the latest software? (Log into the Customer Portal to access) Why can’t I create a new mirror? Firewall…

Error 1265 when running DataKeeper Takesnapshot

DataKeeper Cluster Edition Technical Documentation » Components » DataKeeper Service Log On ID and Password Selection » Error 1265 when running DataKeeper Takesnapshot

PROBLEM: Taking a snapshot when running the command on the target system with DataKeeper fails with error 1265. C:\Program Files (x86)\SIOS\DataKeeper>emcmd (target-server-name) TAKESNAPSHOT (volume-letter of mirrored volume) Status = 1265 emcmd (target system…

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…

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…

Using DKPwrShell with SIOS DataKeeper

DataKeeper Cluster Edition Technical Documentation » Using DKPwrShell with SIOS DataKeeper

SIOS DataKeeper includes a powershell module (DKPwrShell) that allows a user to manipulate a DataKeeper mirror using Microsoft Powershell. Commands are passed to a SIOS DataKeeper service and will fail if the service is not running. With Microsoft Powershell v3 or…

Manual Deployment of a SQL Server Failover Cluster Instance

Deploying DataKeeper Cluster Edition in AWS » Manual Deployment of a SQL Server Failover Cluster Instance

*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…

Silent Installation

DataKeeper Cluster Edition Installation Guide » Installation » Silent Installation

Silent Installation of DataKeeper Cluster Edition You can install DataKeeper Cluster Edition for Windows silently through the use of the -silent command line option. This option suppresses both the wizard and launcher user interfaces (UIs) resulting in what is…

Best Practices

Deploying DataKeeper Cluster Edition in AWS » Best Practices

The following recommendations should be followed for optimal performance. They include considerations specific to both the Windows operating system and AWS Cloud configuration. The primary component of SIOS DataKeeper is an upper filter volume driver. This driver…

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:…

Third Party Product Files

DataKeeper Cluster Edition Installation Guide » Installation » Third Party Product Files

The following third party files were not developed by SIOS Technology Corp. but are installed during the SIOS Protection Suite/DataKeeper installation process. Path and File Name Provider Purpose…

FAQs

DataKeeper Cluster Edition Technical Documentation » FAQs

Refer to this section for answers to the most frequently asked questions about SIOS DataKeeper and SIOS DataKeeper Cluster Edition. ______________________________________________________________________________________________________________ Add a New Disk / DK…

IMPORTANT NOTICE

DataKeeper Cluster Edition Release Notes » IMPORTANT NOTICE

During a review of the current releases of SIOS Protection Suite for Windows and DataKeeper Cluster Edition, we discovered a memory leak issue in ExtMirrSvc.exe within DataKeeper. This issue is limited to SIOS Protection Suite for Windows and DataKeeper versions…

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…

How to Obtain a License

DataKeeper Cluster Edition Installation Guide » About DataKeeper Licensing » How to Obtain a License

Obtaining and Installing the License Activating Your License The final screen of the InstallShield installation utility displays the Host ID of your server. The Host ID, along with the Entitlement ID (Authorization Code) that was provided with your DataKeeper…

Install DataKeeper

Configure a File Server Cluster in Azure Spanning Multiple Availability Zones(AZ) » Install DataKeeper

After the cluster is created, DataKeeper is installed. It is important to install DataKeeper after the initial cluster is created so the custom cluster resource type can be registered with the cluster. If you installed DataKeeper before the cluster was created you will…

Break

DataKeeper Cluster Edition Technical Documentation » User Guide » Working With Mirrors » Break

Breaking a mirror is similar to the Pause and Unlock function. It suspends mirror operation and unlocks the target volume for read/write access. The difference is that the Break operation marks all bits in the DataKeeper Intent Log as dirty, which forces a full…

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;…

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…

Primary Server Shutdown

DataKeeper Cluster Edition Technical Documentation » Administration » Primary Server Shutdown

On a graceful shutdown of the source server, all pending writes to the target are completed. This ensures that all data is present on the target system. On an unexpected source server failure, the Intent Log feature eliminates the need to do a full resync after the…

Most Common Networking Solutions

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » DKCE Common Solutions » Most Common Networking Solutions

The following are the most commonly requested networking related solutions. SIOS DataKeeper Service Will Not Start DataKeeper Service Stopped Unexpectedly Issues/Symptoms: The DataKeeper Service periodically stops. The System Event Viewer will produce the…

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…

UPDATEVOLUMEINFO

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

EMCMD UPDATEVOLUMEINFO This command causes the SIOS DataKeeper service to query the driver for the correct mirror state. This command is useful if the DataKeeper GUI displays information that appears to be incorrect or not up-to-date. Note: The SIOS DataKeeper…

Registry Entries

DataKeeper Cluster Edition Technical Documentation » Administration » Registry Entries

The following registry entries are associated with the SIOS DataKeeper service or driver and can be viewed and edited using Regedt32. *No values in any DataKeeper registry key should be modified unless they are listed here. Registry Entries that MAY be…

Message Catalogs

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Message Catalogs

DKCE with WSFC Message Catalog DKCE Service ExtMirrSvc Message Catalog DKCE Driver ExtMirr – System Event Log Messages SIOS SDRSnapin (DataKeeper GUI) Message Catalog

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:…

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…

Jobs

DataKeeper Cluster Edition Technical Documentation » User Guide » Working With Jobs » Jobs

For ease of use and configuration, SIOS DataKeeper does much of its management of mirrors through an entity called a job. A job is a logical grouping of related mirrors and servers. This feature allows you to create a job for complex repetitive tasks and run them…

Network Bandwidth

DataKeeper Cluster Edition Technical Documentation » Configuration » Network Bandwidth

Because DataKeeper can replicate data across any available network, special consideration must be given to the question, “Is there sufficient bandwidth to successfully replicate the volume and keep the mirror in the mirroring state as the source volume is updated…

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…

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

!Before creating an Empty Role, verify that your mirror(s) are Highly Available by confirming that they are listed in the Failover Cluster Manager\Storage Disk as Available Storage. If you do NOT see your mirror(s) listed as Available Storage, they are NOT Highly…

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…

Performance Tuning

DataKeeper Cluster Edition Technical Documentation » Configuration » Performance Tuning

Please refer to the following topics for ways to improve SIOS DataKeeper performance. SIOS DataKeeper Intent Log – SIOS DataKeeper uses an intent log (also referred to as a bitmap file) to track changes made to the source, or to the target volume when the target…

ReadOnly Host Caching

Deploying DataKeeper Cluster Edition in Azure » ReadOnly Host Caching

According to this Microsoft article, caching is not recommended on disks hosting SQL/Server log files. If the workload is heavily utilizing the underlying disks (any other application than SQL/Server), disk caching should also be set to none. Please refer to…

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…

Using the -proxy option with EMCMD

DataKeeper Cluster Edition Technical Documentation » Using EMCMD with SIOS DataKeeper » Using the -proxy option with EMCMD

All EMCMD requests can be routed through a “proxy” DataKeeper service. To do this, append the options –proxy – to the end of the EMCMD command line. The should be given using the same format as the option. EMCMD will open a connection to the first,…

GETSERVICEINFO

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

EMCMD GETSERVICEINFO This command retrieves version and other information about the SIOS DataKeeper service and driver that is running on the specified machine. The parameters are: This can be either the source or the target systems. Sample…

DataKeeper Volume Resource Health Check

DataKeeper Cluster Edition Technical Documentation » User Guide » Clustering » DataKeeper Volume Resource Health Check

A DataKeeper Volume resource provides two functions that are used by the Microsoft Cluster service to check for availability and health of the DataKeeper Volume resource. A simple check LooksAlive and a more rigorous check IsAlive. LooksAlive The Cluster service…

DataKeeper Cluster Edition Release Notes

DataKeeper Cluster Edition Release Notes

SIOS DataKeeper Cluster Edition Release Notes Version 8.8.0 (Version 8 Update 8) Released July 6, 2021 !IMPORTANT: During a review of the current releases of SIOS Protection Suite for Windows and DataKeeper Cluster Edition, we discovered a memory…

Resync

DataKeeper Cluster Edition Technical Documentation » User Guide » Working With Mirrors » Resync

Use this command to re-establish a broken mirror. A full resync will be performed. Select the job that contains the mirror you want to resync. Right-click on the job selection and choose Resync All Mirrors or select Resync All Mirrors from the Actions task…

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…

SIOS SDRSnapin (DataKeeper GUI) Message Catalog

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Message Catalogs » SIOS SDRSnapin (DataKeeper GUI) Message Catalog

Use Control F to search for a specific error code. Code Severity Message Cause Action 0 Error SDRDataKeeperService: Mirror creation failed, rolling back the job endpoint. 0 Warning…

Deploy an Active Directory Domain Controller in Azure

Configure a File Server Cluster in Azure Spanning Multiple Availability Zones(AZ) » Deploy an Active Directory Domain Controller in Azure

Deploy a Virtual Machine that will work as a Domain Controller for the cluster that is going to be deployed. This step can be skipped if there is a Domain Controller already configured. *This Virtual Machine running a Domain Controller should be in a different…

MaxResyncPasses Value

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

If, during a volume resynchronization, the number of passes made through the intent log exceeds the MaxResyncPasses registry value (200 by default), SIOS DataKeeper logs a message to the Event Log indicating that the resync process is taking too many passes and…

Video Solutions

DataKeeper Cluster Edition Technical Documentation » DataKeeper Troubleshooting » Solutions » Video Solutions

How do you resize a Volume? Summary: ISSUE: How do you resize a Datakeeper Volume? DataKeeper allows users to extend and shrink their DataKeeper volumes dynamically while retaining mirror settings. Once the resize is complete, a partial resync will be…

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…

GETEXTENDEDVOLUMEINFO

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

EMCMD GETEXTENDEDVOLUMEINFO This command returns extended volume information about the selected volume such as disk signature, physical disk offset and internal disk id. The parameters are: This can be either the source or the target systems.…

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…

DKSUPPORT

DataKeeper Cluster Edition Technical Documentation » Administration » DKSUPPORT

DKSUPPORT .cmd, found in the \SUPPORT directory, is used to collect important configuration information and event log files and put them in a zip file. SIOS Support Engineers will commonly request this zip file as part of the support process. To run this utility,…

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…

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 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…

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…

Administration

DataKeeper Cluster Edition Technical Documentation » Administration

The topics in this section provide detailed instructions for performing DataKeeper administration tasks. _____________________________________________________________________________________________________________________________________________________ DataKeeper…

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…

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…

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…

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…

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…

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…

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…

High-Speed Storage Best Practices

DataKeeper Cluster Edition Technical Documentation » Configuration » High-Speed Storage Best Practices

Configure Bitmaps If the DataKeeper default bitmap location (%ExtMirrBase%\Bitmaps) is not located on high-speed storage, you should move the bitmaps to a high-speed storage device in order to eliminate I/O bottlenecks with bitmap access. To do this, allocate a small…

Installing Localized Language Supplement

Installing Localized Language Supplement

LifeKeeper for Windows Localized Language Supplements are available to support LifeKeeper running in a localized environment. The Localized Language Supplement contains translated LifeKeeper GUI text strings and context-sensitive help in the localized language. For…