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Split-Brain FAQs
SIOS DataKeeper for Windows Technical Documentation » FAQs » Split-Brain FAQs
Scenario I am using DataKeeper in a non-cluster environment. I am mirroring from Server1 at one site to Server2 at a second site. Communication is broken due to site-to-site VPN, and I need to fail over from Server1 to Server2. I cannot access Server1 from anywhere.…
User Guide
SIOS DataKeeper for Windows Technical Documentation » User Guide
The topics in this section are designed to be a reference for you as you get started using SIOS DataKeeper, helping you identify the type of configuration you are interested in implementing and providing detailed instructions for effectively using your SIOS DataKeeper…
Windows Server 2012 NIC Teaming Issue
SIOS DataKeeper for Windows Technical Documentation » Troubleshooting » Known Issues and Workarounds » Windows Server 2012 Specific Issues » Windows Server 2012 NIC Teaming Issue
If you use the NIC Teaming feature of Windows Server 2012, Windows 2012 will report only one adapter MAC address for the license. If you have many underlying adapters, the MAC address will arbitrarily change and Windows may pick one of the adapters that may no longer…
DataKeeper User Guide
NO TOC » SIOS Protection Suite for Windows » DataKeeper » DataKeeper User Guide
The topics in this section are designed to be a reference for you as you get started using SIOS DataKeeper, helping you identify the type of configuration you are interested in implementing and providing detailed instructions for effectively using your SIOS DataKeeper…
Pause and Unlock
SIOS DataKeeper for Windows 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
SIOS DataKeeper for Windows 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 –…
Synchronous and Asynchronous Mirroring
SIOS DataKeeper for Windows Technical Documentation » Introduction » 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
SIOS DataKeeper for Windows Technical Documentation » Introduction » 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
SIOS DataKeeper for Windows 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…
Known Issues and Workarounds
SIOS DataKeeper for Windows Technical Documentation » Troubleshooting » Known Issues and Workarounds
Included below are known issues open against DataKeeper as well as possible workarounds and/or solutions. __________________________________________________________________________________________________________________ Access to Designated Volume Denied Failed to…
User Interface
NO TOC » DataKeeper Cluster Edition Technical Documentation » SIOS DataKeeper Cluster Edition Introduction » User Interface
SIOS DataKeeper User Interface The SIOS DataKeeper User Interface uses a standard MMC snap-in interface. The left pane displays the Console Tree view. This includes the Jobs and Reports. Currently, there are two reports available – Job Overview and Server…
User Interface
SIOS DataKeeper for Windows Technical Documentation » Introduction » User Interface
SIOS DataKeeper User Interface The SIOS DataKeeper User Interface uses a standard MMC snap-in interface. The left pane displays the Console Tree view. This includes the Jobs and Reports. Currently, there are two reports available – Job Overview and…
Mirror Creation and Cluster Configuration
SIOS DataKeeper for Windows 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…
Create a Mirror and Rename Job and Delete Job Actions Grayed Out
SIOS DataKeeper for Windows 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.
Switchover and Failover with Multiple Targets
SIOS DataKeeper for Windows 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…
Delete and Switchover Actions Grayed Out
SIOS DataKeeper for Windows 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
SIOS DataKeeper for Windows 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…
DataKeeper Cluster Edition Installation Guide
NO TOC » DataKeeper Cluster Edition Installation Guide
The DataKeeper Cluster Edition Installation Guide contains information on how to install and license your Cluster Edition software. Once you have completed the steps in this guide, you will be ready to configure your Cluster resources. The DataKeeper Cluster Edition…
Awareness of Windows Filenames and Directory Names
SIOS DataKeeper for Windows 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…
Using SIOS DataKeeper Standard Edition To Provide Disaster Recovery For Hyper-V Virtual Machines
SIOS DataKeeper for Windows 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…
DataKeeper Service Log On ID and Password Selection
SIOS DataKeeper for Windows Technical Documentation » Introduction » DataKeeper 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 Service Log On ID and Password Selection
SIOS DataKeeper for Windows Technical Documentation » Configuration » 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…
SIOS DataKeeper for Windows Quick Start Guide
SIOS DataKeeper for Windows Quick Start Guide
This topic provides step-by-step instructions for installing and configuring DataKeeper Standard Edition. The series of steps includes links into the documentation that describe each step in detail. Prerequisites and Installation Read the SIOS Protection Suite for…
SWITCHOVERVOLUME
SIOS DataKeeper for Windows Technical Documentation » Administration » Using EMCMD with SIOS DataKeeper » SWITCHOVERVOLUME
EMCMD SWITCHOVERVOLUME [-f] This command attempts to make the given system become the source for the requested volume. This command is for internal use only. The parameters are: This is the IP address of the system to become source. Note: Use the…
PREPARETOBECOMETARGET
SIOS DataKeeper for Windows Technical Documentation » Administration » Using EMCMD with SIOS DataKeeper » PREPARETOBECOMETARGET
EMCMD PREPARETOBECOMETARGET This command should only be used to recover from a Split-Brain condition. It should be run on the system where the mirror is to become a target and is only valid on a mirror source. This command causes the mirror to be deleted and the…
User Interface – Failed to Create Mirror
SIOS DataKeeper for Windows Technical Documentation » 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:…
Installing and Using DataKeeper Cluster Edition on Windows Server 2008 R2 / 2012 Core Platforms
NO TOC » SIOS Protection Suite for Windows » 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…
Server Login Accounts and Passwords Must Be Same on Each Server in the Cluster
SIOS DataKeeper for Windows Technical Documentation » 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…
User Interface – Shows Only One Side of the Mirror
SIOS DataKeeper for Windows Technical Documentation » 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…
DataKeeper Notification Icon
SIOS DataKeeper for Windows Technical Documentation » User Guide » DataKeeper Notification Icon
The DataKeeper Notification Icon is an application that will show a summary of your DataKeeper mirrors in the Windows Notification Tray. The icon displayed indicates what conditions have been detected, with the following priority. Error: An error condition, such as…
FAQs
SIOS DataKeeper for Windows Technical Documentation » FAQs
Refer to this section for answers to the most frequently asked questions about SIOS DataKeeper. ______________________________________________________________________________________________________________ Awareness of Windows Filenames and Directory Names AWS…
CHANGEMIRRORTYPE
SIOS DataKeeper for Windows Technical Documentation » Administration » 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. …
SIOS DataKeeper Cluster Edition Introduction
NO TOC » DataKeeper Cluster Edition Technical Documentation » SIOS DataKeeper Cluster Edition Introduction
SIOS DataKeeper Overview DataKeeper with High Availability – Cluster Edition Overview SIOS DataKeeper is a highly optimized host-based replication solution which ensures your data is replicated as quickly and as efficiently as possible from your source server…
DataKeeper Cluster Edition Release Notes
NO TOC » DataKeeper Cluster Edition Release Notes
SIOS DataKeeper Cluster Edition Release Notes Version 8.6.2 (Version 8 Update 6 Maintenance 2) Important!! Read This Document Before Attempting To Install Or Use This Product! This document contains last minute information that must be considered before, during…
SIOS DataKeeper Intent Log
SIOS DataKeeper for Windows Technical Documentation » Introduction » 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…
Error Messages Log
SIOS DataKeeper for Windows 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 –…
One-to-Many (Multiple Targets)
SIOS DataKeeper for Windows Technical Documentation » User Guide » Getting Started » One-to-Many (Multiple Targets)
This configuration involves one primary (source) system replicating one (or more) volume(s) to two different target systems across the network. This is referred to as a multiple target configuration. Note that there are two mirrors that are completely independent…
Switchover in an N-Shared x N-Shared Configuration
NO TOC » SIOS Protection Suite for Windows » 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…
Deleting a Mirror
SIOS DataKeeper for Windows 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…
Many-to-One
SIOS DataKeeper for Windows Technical Documentation » User Guide » Getting Started » Many-to-One
This configuration involves multiple source servers replicating one (or more) volumes to the same target system. In this configuration, each volume being replicated to the target server must have a unique drive letter. Note: This is actually two One-to-One…
DataKeeper Components
SIOS DataKeeper for Windows Technical Documentation » Introduction » 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 endpoints. DataKeeper Service…
Non-mirrored Volume Resource
NO TOC » SIOS Protection Suite for Windows » 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…
Components
NO TOC » DataKeeper Cluster Edition Technical Documentation » SIOS DataKeeper Cluster Edition Introduction » 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…
Switching Over a Mirror
SIOS DataKeeper for Windows 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…
Windows Server 2012 Specific Issues
SIOS DataKeeper for Windows Technical Documentation » 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 iSCSI Target Role Does…
Network Adapter Settings
SIOS DataKeeper for Windows Technical Documentation » Configuration » Network Adapter Settings
DataKeeper requires that “File and Printer Sharing for Microsoft Networks” be enabled on the network interfaces to make a NAMED PIPE connection and be able to run DataKeeper’s command line tool (EMCMD). To test if you can make a Named Pipe connection,…
Troubleshooting
SIOS DataKeeper for Windows Technical Documentation » Troubleshooting
The topics in this section contain important information about known issues and restrictions offering possible workarounds and/or solutions. ________________________________________________________________________________________________________________ Known Issues…
Network Disconnect
SIOS DataKeeper for Windows Technical Documentation » FAQs » Network Disconnect
Scenario #1 In a 2-Node, non-clustering configuration (1×1) replicating a 100TB volume between Source server and Target server over a WAN connection, the network goes down for twenty minutes. Question In this scenario, what would happen to the Mirror State with…
N-Shared-Disk Replicated to One
SIOS DataKeeper for Windows 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…
GETVOLUMEDRVSTATE
SIOS DataKeeper for Windows Technical Documentation » Administration » 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 N-Shared-Disk
SIOS DataKeeper for Windows Technical Documentation » User Guide » Getting Started » N-Shared-Disk Replicated to N-Shared-Disk
This configuration replicates data between sites where each site utilizes shared storage. 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 only the Source Server has access to the…
One-to-One
SIOS DataKeeper for Windows Technical Documentation » User Guide » Getting Started » One-to-One
This is a simple one source, one target configuration, mirroring Volume X across the network. In addition to providing a second physical copy of the data, DataKeeper also provides the ability to switch over the mirror which allows the data to become active on the…
Primary Server Shutdown
SIOS DataKeeper for Windows 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…
Creating a Mirror
SIOS DataKeeper for Windows 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…
Windows Server 2012 MMC Snap-in Crash
SIOS DataKeeper for Windows Technical Documentation » 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…
Using Microsoft iSCSI Target With DataKeeper on Windows 2012
SIOS DataKeeper for Windows 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. …
DataKeeper Target Snapshot
SIOS DataKeeper for Windows 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…
Using EMCMD with SIOS DataKeeper
SIOS DataKeeper for Windows Technical Documentation » Administration » Using EMCMD with SIOS DataKeeper
The EMCMD utility that ships with SIOS DataKeeper provides users with a command line method to manipulate the mirror. Because these scripts run in situations where the “normal” validation rules may not apply, EMCMD does not perform the same kinds of sanity…
Bitlocker Does Not Support DataKeeper
SIOS DataKeeper for Windows Technical Documentation » Troubleshooting » Restrictions » Bitlocker Does Not Support DataKeeper
According to Microsoft, Bitlocker is not supported to work with Software RAID configurations. Since DataKeeper is essentially a software RAID 1, Microsoft does not support Bitlocker working with DataKeeper. Note: EFS (Encrypting File System) and TDE (Transparent Disk…
High-Speed Storage Best Practices
SIOS DataKeeper for Windows 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…
Firewall Configurations
SIOS DataKeeper for Windows Technical Documentation » Configuration » Firewall Configurations
SIOS DataKeeper cannot function properly if the firewall settings for the source and target machines are not configured correctly. This means you will need to configure a rule for inbound and outbound connections on each server running SIOS DataKeeper as well as any…
Jobs
SIOS DataKeeper for Windows 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…
Upgrading SIOS DataKeeper Cluster Edition
NO TOC » 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…
Creating Mirrors With Shared Volumes
SIOS DataKeeper for Windows Technical Documentation » User Guide » Configuring Mirrors » Creating Mirrors With Shared Volumes
In order to properly configure DataKeeper in a shared volume configuration, use the DataKeeper GUI to connect to all systems where the shared volumes are configured. When connected, the DataKeeper GUI uses hardware signatures to automatically detect which volumes are…
Licensing
NO TOC » SIOS Protection Suite for Windows » SIOS Protection Suite Installation Guide » Installing SIOS Protection Suite » Licensing
Obtaining and Installing the License DataKeeper Cluster Edition requires a unique license for each server. The license is a run-time license which means that you can install it without the license, but the license must be installed before you can successfully start…
Network Bandwidth
SIOS DataKeeper for Windows 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…
Uninstalling SIOS DataKeeper Cluster Edition
NO TOC » DataKeeper Cluster Edition Installation Guide » Uninstalling SIOS DataKeeper Cluster Edition
Before Removing DataKeeper If planning to uninstall DataKeeper and reinstall a previous version, all jobs/mirrors must be deleted on each node prior to uninstalling. These will need to be recreated once software is reinstalled. Uninstall DataKeeper Cluster…
Volume Considerations
SIOS DataKeeper for Windows Technical Documentation » Introduction » 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…
Adding a Shared System
SIOS DataKeeper for Windows 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,…
Managing Mirrors
SIOS DataKeeper for Windows Technical Documentation » User Guide » Working With Mirrors » Managing Mirrors
From the Actions pane, you can select a job and manage all the mirrors in a job, or you can perform an action on a single mirror in a job. After selecting a job, you can: Pause and Unlock All Mirrors Continue and Lock All Mirrors Break All…
Using DataKeeper Cluster Edition to Enable Multi-Site Hyper-V Clusters
NO TOC » SIOS Protection Suite for Windows » 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;…
Deleting a Mirror
SIOS DataKeeper for Windows 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.
DKHEALTHCHECK
SIOS DataKeeper for Windows Technical Documentation » Administration » DKHEALTHCHECK
DKHealthCheck.exe, found in the \DKTools directory, is a tool that can provide basic mirror status and problem detection of mirror issues. SIOS Support may request that you run this tool as part of the Support process. Note: DKHEALTHCHECK output is captured by…
Resynchronization
SIOS DataKeeper for Windows Technical Documentation » Introduction » 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…
Access to Designated Volume Denied
SIOS DataKeeper for Windows Technical Documentation » 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…
Unextending a Hierarchy
NO TOC » SIOS Protection Suite for Windows » Administration » Working With Resource Hierarchies » Unextending a Hierarchy
The Unextend Resource Hierarchy option removes a complete hierarchy, including all of its resources, from a single server. This is different than the Delete Resource Hierarchy selection which removes a hierarchy from all servers. When using Unextend Resource…
DELETELOCALMIRRORONLY
SIOS DataKeeper for Windows Technical Documentation » Administration » Using EMCMD with SIOS DataKeeper » DELETELOCALMIRRORONLY
EMCMD DELETELOCALMIRRORONLY [] This command deletes the mirror only on the it is issued on. It handles the case when a mirror ends up with a target and no source or source and no target. The parameters are: This can be either the source or the…
Intensive I-O with Synchronous Replication
SIOS DataKeeper for Windows Technical Documentation » Troubleshooting » Restrictions » Intensive I-O with Synchronous Replication
Description Due to the nature of synchronous replication (blocking volume writes while waiting for a response from the target system), you may experience sluggish behavior with any applications that are writing to the mirrored volume. The frequency of these events…
CHKDSK Considerations
SIOS DataKeeper for Windows Technical Documentation » Administration » CHKDSK Considerations
If you must run CHKDSK on a volume that is being mirrored by SIOS DataKeeper, it is recommended that you first pause the mirror. After running CHKDSK, continue the mirror. A partial resync occurs (updating those writes generated by the CHKDSK) and mirroring will…
Mirror Properties
SIOS DataKeeper for Windows 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…
Managing Shared Volumes
SIOS DataKeeper for Windows Technical Documentation » User Guide » Working With Shared Volumes » Managing Shared Volumes
Once your mirrors have been created, DataKeeper allows you to manage your shared volumes. By choosing Manage Shared Volumes from the DataKeeper GUI, you can add another system, which is sharing a mirrored volume, to a job. It also allows you to remove a shared system…
Safe Creation of a Shared-Storage Volume Resource
SIOS DataKeeper for Windows 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…
Creating Mirrors With Multiple Targets
SIOS DataKeeper for Windows Technical Documentation » User Guide » Configuring Mirrors » Creating Mirrors With Multiple Targets
SIOS DataKeeper provides the ability to replicate data from a single source volume to one or more target volumes. In addition, DataKeeper also allows you to switch over control and make any of the target volumes become the source. Assuming you have already created a…
DataKeeper Event Log Notification
SIOS DataKeeper for Windows 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…
GETRESYNCSTATUS
SIOS DataKeeper for Windows Technical Documentation » Administration » Using EMCMD with SIOS DataKeeper » GETRESYNCSTATUS
EMCMD GETRESYNCSTATUS This command returns information indicating the overall status of a resync operation. The parameters are: This can be either the source or the target systems. The drive letter of the volume you want to set…
Disconnecting from a Server
SIOS DataKeeper for Windows Technical Documentation » User Guide » Setup » 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.
DELETEMIRROR
SIOS DataKeeper for Windows Technical Documentation » Administration » Using EMCMD with SIOS DataKeeper » DELETEMIRROR
EMCMD DELETEMIRROR [] This command deletes the mirror from both the source and the target if is a source. If is a target, it will delete the target side of the mirror only if the source system is down. The parameters are: This can be either the…
Performance Monitor Counters
SIOS DataKeeper for Windows Technical Documentation » Introduction » 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…
DKSUPPORT
SIOS DataKeeper for Windows 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,…
READREGISTRY
SIOS DataKeeper for Windows Technical Documentation » Administration » Using EMCMD with SIOS DataKeeper » READREGISTRY
EMCMD READREGISTRY This command tells the SIOS DataKeeper driver to re-read its registry settings. The parameters are: This can be either the source system or the target system. The drive letter of the mirror for which you want…
Add-DataKeeperJobPair
SIOS DataKeeper for Windows Technical Documentation » Administration » Using DKPwrShell with SIOS DataKeeper » Add-DataKeeperJobPair
This cmdlet will add a node pair to an existing DataKeeper Job. It is used to expand the nodes and volumes contained within an existing job. For example, if a job exists for a volume between nodes A and B, and you want to add node C, run AddDataKeeperJobPair…
Creation of iSCSI Virtual Disks
SIOS DataKeeper for Windows 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…
GETEXTENDEDVOLUMEINFO
SIOS DataKeeper for Windows Technical Documentation » Administration » 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.…
CREATEMIRROR
SIOS DataKeeper for Windows Technical Documentation » Administration » 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…
Registry Entries
SIOS DataKeeper for Windows Technical Documentation » Administration » Registry Entries
The following registry entries are associated with the SIOS DataKeeper service or driver and can be viewed using Regedt32. The first section contains entries that may be modified; the second section contains entries that are for viewing only and should not be…
Windows Server 2012 iSCSI Target Role Does Not Support Dynamic Disks
SIOS DataKeeper for Windows Technical Documentation » Troubleshooting » Known Issues and Workarounds » Windows Server 2012 Specific Issues » Windows Server 2012 iSCSI Target Role Does Not Support Dynamic Disks
Description The iSCSI Target Role only supports DataKeeper Volumes that are mirrors of Simple Volumes placed on Basic Disks. If any of your mirrors are using volumes such as Striped or Spanned volumes on a Dynamic Disk on either the source or target system, then you…
SETCONFIGURATION
SIOS DataKeeper for Windows Technical Documentation » Administration » Using EMCMD with SIOS DataKeeper » SETCONFIGURATION
EMCMD SETCONFIGURATION This command sets the net alert settings (also referred to as “volume attributes”) for the volume. The parameters are: This can be either the source or the target system. The drive letter of the…
Relocation of Intent Log
SIOS DataKeeper for Windows Technical Documentation » Introduction » 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…
Using the -proxy option with EMCMD
NO TOC » DataKeeper Cluster Edition Technical Documentation » 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 …
Setup of iSCSI Initiator on Windows 2012
SIOS DataKeeper for Windows 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…