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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…

Event Log Considerations

SIOS DataKeeper for Windows 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

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…

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…

System Event Log – Create Mirror Failed in the GUI

SIOS DataKeeper for Windows Technical Documentation » 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.

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…

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 –…

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…

DataKeeper Volume Resize

SIOS DataKeeper for Windows Technical Documentation » User Guide » Working With Mirrors » DataKeeper Volume Resize

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 performed. Note: This resize procedure should be performed on only one volume at a time. !WARNING …

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

Setting Up SIOS DataKeeper

SIOS DataKeeper for Windows Technical Documentation » User Guide » Setup » Setting Up SIOS DataKeeper

Setting Up SIOS DataKeeper Follow these steps to start using SIOS DataKeeper: Connect to the servers you wish to configure for replication. You can select Connect to Server from the Action pull down menu, right-click on the job folder in the left panel tree…

DataKeeper Volume Resize Restriction

SIOS DataKeeper for Windows Technical Documentation » Troubleshooting » Restrictions » DataKeeper Volume Resize Restriction

The DataKeeper volume resize procedure should be performed on only one volume at a time.

SIOS DataKeeper for Windows

SIOS DataKeeper for Windows

Your information resource for SIOS DataKeeper Standard Edition SIOS Technology Corp. maintains documentation for all supported versions of SIOS DataKeeper Standard Edition. We welcome your suggestions and feedback. To help us continue to improve our documentation,…

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…

Using DKPwrShell with SIOS DataKeeper

SIOS DataKeeper for Windows Technical Documentation » Administration » 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…

SIOS DataKeeper for Windows Technical Documentation

SIOS DataKeeper for Windows Technical Documentation

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…

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. …

Antivirus Software Exclusion List for LifeKeeper and DataKeeper for Windows

SIOS DataKeeper for Windows Technical Documentation » 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…

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…

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,…

Administration

SIOS DataKeeper for Windows Technical Documentation » Administration

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

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:…

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…

Failed to Create Mirror

SIOS DataKeeper for Windows Technical Documentation » 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…

MaxResyncPasses Value

SIOS DataKeeper for Windows Technical Documentation » 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…

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…

UPDATEVOLUMEINFO

SIOS DataKeeper for Windows Technical Documentation » Administration » 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…

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…

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…

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 Antivirus…

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…

Performance Tuning

SIOS DataKeeper for Windows 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…

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…

Configuration

SIOS DataKeeper for Windows Technical Documentation » Configuration

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

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…

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…

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 and edited using Regedt32. *No values in any DataKeeper registry key should be modified unless they are listed here. Registry Entries that MAY be…

Mirror State Definitions

SIOS DataKeeper for Windows Technical Documentation » Administration » 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…

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…

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…

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…

Break

SIOS DataKeeper for Windows 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…

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 –…

Replacing a Target

SIOS DataKeeper for Windows 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…

Unable to Determine Previous Install Path

SIOS DataKeeper for Windows Technical Documentation » Troubleshooting » Known Issues and Workarounds » Unable to Determine Previous Install Path

Installation – Fatal Error: Unable to Determine Previous Install Path Error/Message Fatal Error: Unable to determine previous install path. DataKeeper cannot be uninstalled or reinstalled. Description When performing a “Repair” or…

CLEANUPMIRROR

SIOS DataKeeper for Windows Technical Documentation » Administration » Using EMCMD with SIOS DataKeeper » CLEANUPMIRROR

C:\Program Files (x86)\SIOS\DataKeeper\Support>cleanupmirror This command can only be run locally on a node and will remove all remnants of the mirror. When to use: For mirrors that were not removed from WSFC or the DataKeeper GUI To remove mirror remnants…

Bandwidth Throttle

SIOS DataKeeper for Windows Technical Documentation » Configuration » WAN Considerations » Bandwidth Throttle

In bandwidth constrained networks, DataKeeper attempts to utilize all of the available network bandwidth. If DataKeeper is sharing the available bandwidth with other applications, you may wish to limit the amount of bandwidth DataKeeper is allowed to use. DataKeeper…

Video Solutions

SIOS DataKeeper for Windows Technical Documentation » Troubleshooting » 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…

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…

Restrictions

SIOS DataKeeper for Windows Technical Documentation » Troubleshooting » Restrictions

Included below are restrictions associated with DataKeeper and DataKeeper Cluster Edition as well as possible workarounds and/or solutions. __________________________________________________________________________________________________________________ Bitlocker…

Using Volume Shadow Copy

SIOS DataKeeper for Windows Technical Documentation » FAQs » Using Volume Shadow Copy

Question Can Volume Shadow Copy (VSS) be Used with DataKeeper Volumes? Answer VSS Shadow Copy can be enabled for DataKeeper volumes. However, the following guidelines apply: VSS snapshot images must not be stored on a DataKeeper volume. Storing VSS snapshots on…

Sector Size

SIOS DataKeeper for Windows Technical Documentation » Configuration » Sector Size

Beginning with DataKeeper Version 7.2.1, disks with sector size not equal to 512 bytes are supported. However, DataKeeper requires that the mirror source volume be configured on disk(s) whose sector size is the same as the disk(s) where the mirror target is configured.…

Manual Creation of a Mirror 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…

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…

Data Transfer Network Protocols

SIOS DataKeeper for Windows Technical Documentation » FAQs » Data Transfer Network Protocols

Question What are the network protocols used for SIOS DataKeeper Data Transfer? Answer SIOS DataKeeper uses named pipe communication and TCP Sockets.

Extensive Write Considerations

SIOS DataKeeper for Windows Technical Documentation » Administration » Extensive Write Considerations

SIOS DataKeeper allows a volume that is being resynced to be accessed and written to. During Resync, DataKeeper makes multiple passes through the bitmap, synchronizing the data corresponding to each dirty bit found. While this is happening, writes that occur on the…

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…

Introduction

SIOS DataKeeper for Windows Technical Documentation » Introduction

SIOS DataKeeper 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 across the network to one or more target servers. Features Some…

New-DataKeeperMirror

SIOS DataKeeper for Windows Technical Documentation » Administration » 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…

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…

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…

Resize or Grow Mirrored Volumes

SIOS DataKeeper for Windows Technical Documentation » FAQs » Resize or Grow Mirrored Volumes

Question Can you resize or grow mirrored volumes? Answer Yes, beginning with Version 7.4, users can extend and shrink their DataKeeper volumes dynamically while retaining mirror settings. See DataKeeper Volume Resize for more information.

New-DataKeeperJob

SIOS DataKeeper for Windows Technical Documentation » Administration » Using DKPwrShell with SIOS DataKeeper » New-DataKeeperJob

This cmdlet is used to create a DataKeeper job consisting of two nodes. Jobs created using this cmdlet will be added to the DataKeeper SnapIn the next time it is loaded. Parameters Parameter Type Required Position Notes JobName …

Using Disk Management

SIOS DataKeeper for Windows Technical Documentation » Administration » Using Disk Management

When using the Windows Disk Management utility to access SIOS DataKeeper volumes, please note the following: Using Disk Management to delete partitions that are being mirrored is not supported. Deleting a partition that is part of a SIOS DataKeeper mirror will yield…

Disable “Automatically manage paging file size for all drives”

SIOS DataKeeper for Windows Technical Documentation » Configuration » Disable “Automatically manage paging file size for all drives”

By default, Windows configures virtual memory so that page files are automatically created on volumes as the Operating System determines is best. This Virtual Memory setting is called “Automatically manage paging file size for all drives”. When this…

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…

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…

Understanding Replication

SIOS DataKeeper for Windows Technical Documentation » Introduction » Understanding Replication

How SIOS DataKeeper Works At the highest level, DataKeeper provides the ability to mirror a volume on one system (source) to a different volume on another system (target) across any network. When the mirror is created, all data on the source volume is initially…

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…

WAN Considerations

SIOS DataKeeper for Windows Technical Documentation » Configuration » WAN Considerations

Replicating data across the network to a remote server located miles away from the source server is the most common use of DataKeeper. Typically, this configuration relies on a WAN of some sort to provide the underlying network that DataKeeper uses to replicate the…

Initial Synchronization of Data Across the LAN or WAN

SIOS DataKeeper for Windows 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…

Reclaim Full Capacity of Target Drive

SIOS DataKeeper for Windows 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…

GETSERVICEINFO

SIOS DataKeeper for Windows Technical Documentation » Administration » 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…

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…

Get-DataKeeperVolumeInfo

SIOS DataKeeper for Windows Technical Documentation » Administration » Using DKPwrShell with SIOS DataKeeper » Get-DataKeeperVolumeInfo

This cmdlet is used to fetch information about a volume used in DataKeeper. It reports DataKeeper volume information. Parameters Parameter Type Required Position Notes Node String Yes 0 Use the Node parameter…

Setup

SIOS DataKeeper for Windows Technical Documentation » User Guide » Setup

Setting Up SIOS DataKeeper Follow these steps to start using SIOS DataKeeper: Connect to the servers you wish to configure for replication. You can select Connect to Server from the Action pull down menu, right-click on the job folder in the left panel tree…

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…

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…

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…

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…

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…

Network Adapter Settings

SIOS DataKeeper for Windows Technical Documentation » Configuration » Network Adapter Settings

!These paths may not work for some platforms (Windows 2012 R2, 2016, 2019), but to ensure the GUI operates properly be sure to have “Client for Microsoft Networks” and “File and Printer Sharing” enabled. DataKeeper requires that “File…

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…

STOPSERVICE

SIOS DataKeeper for Windows Technical Documentation » Administration » Using EMCMD with SIOS DataKeeper » STOPSERVICE

EMCMD STOPSERVICE This command stops the DataKeeper service. When the command is successful, it will return a status of 1072.

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.…

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…

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…

Working With Mirrors

SIOS DataKeeper for Windows Technical Documentation » User Guide » Working With Mirrors

Managing Mirrors Pause and Unlock Continue and Lock Partial Resync Break Resync Deleting a Mirror Replacing a Target DataKeeper Volume Resize Mirror Properties Changing the Compression Level of an Existing Mirror

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.

Resource Tag Name Restrictions

Resource Tag Name Restrictions

Tag Name Length All tags within DataKeeper may not exceed the 256 character limit. Valid “Special” Characters - _ . / However, the first character in a tag should not contain “.” or “/”. Invalid…

ISPOTENTIALMIRRORVOL

SIOS DataKeeper for Windows Technical Documentation » Administration » Using EMCMD with SIOS DataKeeper » ISPOTENTIALMIRRORVOL

EMCMD ISPOTENTIALMIRRORVOL This command checks to determine if a volume is a candidate for mirroring. The command may only be run on the local system. The parameters are: This should be the local system. The drive letter of the…

REGISTERCLUSTERVOLUME

SIOS DataKeeper for Windows Technical Documentation » Administration » 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.…

SQL FCI on Workgroup Clusters

SIOS DataKeeper for Windows Technical Documentation » 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 Standard Edition cannot be used to protect Microsoft SQL Server Failover Cluster Instances in a workgroup…

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…

Deleting a Job

SIOS DataKeeper for Windows 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…

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…

Renaming a Job

SIOS DataKeeper for Windows 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…