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 SIOS DataKeeper driver could not be started since the system is running an unsupported version of the operating system.
Required OS Version: %t%2.%3 Build %4
Current OS Version: %t%5.%6 Build %7
16 Warning The mirrored state of a Source volume has been changed. Unable to write data to the Target Can’t successfully send the data packet to the target and receive a reply. 
16 Warning The mirrored state of a Source volume has been changed. Source was unable to complete volume write Temporarily cannot add a write request to the Async Queue. Temporarily out of Non Paged Memory
16 Warning The mirrored state of a Source volume has been changed. The High Water mark has been reached in the Async Write Queue The number of writes in the Async Queue has reached the High Water Mark. Mirror must Pause and the Resync to catch up. Typically occurs during periods of peak write activity on the source volume.
16 Warning The mirrored state of a Source volume has been changed. Mirror Deleted. Mirror was deleted
16 Warning The mirrored state of a Source volume has been changed. Mirror in Mirror state on boot Normal message when a Source system boots up
16 Warning The mirrored state of a Source volume has been changed. Mirror in Resync Pending state on boot. Typically occurs when the original Source system fails. The original Target system becomes the new Source of the mirror while the original source is down. When the original Source system comes back up, it sees that the original Target system is now the Source. The orginal Source system becomes the new Target. A partial resync will be performed.
16 Warning The mirrored state of a Source volume has been changed. The Low Water mark has been reached in the Async Write Queue If the mirror pauses due to hitting the high water mark or because of running out of non paged memory, when all entries in the Async queue have been freed, the mirror state transitions from the Paused state into the Resync state and a partial resync begins.
16 Warning The mirrored state of a Source volume has been changed. Resync after re-connecting with the Target. Normal message when Source and Target reconect after they have been disconnected.
16 Warning The mirrored state of a Source volume has been changed. Automatic Partial Resync Initiated
16 Warning The mirrored state of a Source volume has been changed. Mirror Resynchronization.
16 Warning The mirrored state of a Source volume has been changed. Merge of target bitmap failed
16 Warning The mirrored state of a Source volume has been changed. Resync Failure
16 Warning The mirrored state of a Source volume has been changed. Unable to send packet request to the Target. Problem sending write requests to the Target volume.
16 Warning The mirrored state of a Source volume has been changed. Resync after re-connecting with the Target.
16 Warning The mirrored state of a Source volume has been changed. Cannot start target thread – mirror is in Source mode.
16 Warning The mirrored state of a Source volume has been changed. Mirror Resynchronization.
17 Error An invalid attempt was made to change the state of a Source volume. The volume will remain in state %3.
18 Error A partition that is currently involved in a mirror has been modified.
As a result, the mirror will be broken.
Volume Device: %t%1
Volume Letter: %t%2
Current State: %t%3
In the future, please break all mirrors on a physical disk before
re-partitioning that disk in order to ensure the integrity of data
on the mirrored volumes.
19 Warning The driver has determined that the file system is invalid.
20 Warning The mirrored state of a Target volume has been changed. Mirror Resynchronization.
20 Warning The mirrored state of a Target volume has been changed. Mirror Resynchronization.
20 Warning The mirrored state of a Target volume has been changed. Mirror Deleted. No targets remain.
20 Warning The mirrored state of a Target volume has been changed. Mirror Resynchronization.
20 Warning The mirrored state of a Target volume has been changed. Mirror Resynchronization.
21 Warning The mirror role of the volume has been changed. Mirror Resynchronization.
22 Warning Unable to connect to the target machine for this volume. Mirror Resynchronization.
23 Warning The mirror role of the volume has been changed. Mirror Created. System has become the Source of the mirror as a result of a Create Mirror command.
23 Warning The mirror role of the volume has been changed. Mirror Created. System has become the Source of the mirror as a result of a Create Mirror command.
23 Warning The mirror role of the volume has been changed. Mirror Deleted. No targets remain. System is no longer the Source of the mirror as a result of a Delete Mirror command.
23 Warning The mirror role of the volume has been changed. Mirror Created. System has become the Target of the mirror as a result of a Create Mirror command.
23 Warning The mirror role of the volume has been changed. Mirror Deleted. No targets remain. System is no longer the Target of the mirror as a result of a Delete Mirror command.
33 Error Unable to connect to the target machine for this volume. Related to Event 167 – Cannot lock Target Volume (Check Distributed Link Tracking service, Firewall)
34 Error An error occurred while writing a connection header to the target. The will be broken.
The error code above is a driver status value.
35 Warning Writes to this volume will no longer be mirrored to the target. The mirror will be broken.
37 Error A write to the local (source) disk has failed.
38 Error A write to the local (source) disk has been cancelled.
Cancelling of writes is not supported for mirrored drives.
39 Error The DataKeeper driver failed to queue a volume write.
40 Error Cannot create a mirror on the drive where persistent bitmap files are stored.
Mirror creation has been terminated. To create a mirror on this volume, change the BitmapBaseDir value in the ExtMirr driver Parameters
registry key to use a different drive, and reboot.
48 Warning The mirror has been deleted.
49 Warning The mirror has been deleted. However, since the delete was performed during a mirror resynchronization, or before a previously-interrupted resynchronizaion was ever completed, the contents of the volume may be corrupted. The source and target volumes are not in sync. If a mirror is deleted during a RESYNC, the data on the target volume may not be in a sound state. Reformat target volume.
50 Warning The mirror has been commanded to failover.
55 Error Error 5 creating GUI pipe One system can’t connect to the named pipe on another system due to incorrect NIC Metric. A weighted value must be assigned to all NICs bound by the TCP/IP protocol, even “disabled” NICs.
Change the NIC binding order.
The binding order can be located in the Control Panel > All Control Panel Items > Network and Sharing Center:

Select Organize > Layout > Menu Bar > Advanced > Advanced Settings > change the binding order

Note: The lower the number, the higher the priority the NIC is. The NIC that the GUI is going to connect to (which is the first in the binding order) should to be the lowest metric assigned. The metric numbers need to be assigned the same between the systems.
55 Error Error 5 creating GUI pipe DataKeeper has problems connecting to both servers in the cluster. In the Event Viewer, messages appear stating “Error 5 creating GUI pipe”.


The user is not part of the local administrator group of each system.
  • On each system go to “Users and Groups”.
  • Then, go under Groups and then Administrators.
  • Add the user that you are using for the DataKeeper Service to the Administrators group on each server that you have in the cluster.
58 Error An error occurred while writing a keep-alive packet over the network. Error Code 0×102 Temporary Network interruption to Target system – Info only – no action required
59 Error An error occurred while writing a keep-alive packet over
the network. The mirror will be BROKEN.
64 Error An error occurred while writing a keep-alive packet over
the network. The mirror will be PAUSED.
65 Error An error occurred while writing data to the target over the
network. The mirror will be BROKEN.
66 Error An error occurred while writing data to the target over the
network. The mirror will be PAUSED.
67 Error An error occurred while attempting to read the response from the target
machine over the network. The mirror will be broken.
68 Error The target machine has reported an error in writing the sent data to
its disk. The mirror will be broken.
69 Warning A network error occured while transmitting data to the target machine.
An attempt will be made to reconnect with the target system without
losing any mirrored write. The mirror will not be broken at this time.
70 Error There was an error after attempting to reconnect to the target system.
The mirror will be broken.
71 Info Successfully recovered from a network failure.
72 Error Error creating a volume named pipe.
73 Error Error connecting to the existing volume named pipe,
although the Target Control Thread is alive. The
EM service will attempt to restart the volume pipe.
96 Info A mirror resynchronization has begun.
97 Info The mirror resynchronization has completed successfully.
98 Warning During Resynchronization, a large number of passes to update the mirror has been made due to incoming writes. In order to ensure that the resynchronization will complete soon, please stop all write access to the volume. This can occur if there is a process constantly writing to the Source volume. Even if it is only writing a small amount, as soon DK makes one pass through the bitmap file, more bits are marked dirty and another pass is required.
99 Info The mirror resynchronization has failed.
100 Error The mirror resynchronization has been aborted due to
a mirror state change.
101 Error The mirror resynchronization has been aborted due to
an error reading a block from the source volume.
128 Warning This volume was not shutdown cleanly. As a result, the mirror could not
be continued.
An automatic mirror resynchronization will be performed to ensure that the
source and target are in sync.
129 Warning The mirror on this volume could not be continued as the
volume was not in None state at the time of a system shutdown.
An automatic mirror resynchronization will be performed to ensure that the
source and target are in sync.
130 Warning A continue of the mirror on this volume could not be performed as the
volume was not in None state. This could be due to writes received during
boot before a connection could be made to the target machine.
An automatic mirror resynchronization will be performed to ensure that the
source and target are in sync.
131 Warning SIOS DataKeeper was told to continue a mirror on this volume during a
system boot, but the registry value ““AutoResyncOnBoot”“ was set to 2. This
indicates that the volume should always be resynchronized in the event of
a system reboot.
As a result, an automatic mirror resynchronization will be performed to
ensure that the source and target are in sync.
132 Warning SIOS Datakeeper was told to continue a mirror on this volume, but the
registry value ““AutoResyncOnContinue”“ was set to 2. This indicates that
the volume should always be resynchronized when continued.
As a result, an automatic mirror resynchronization will be performed to
ensure that the source and target are in sync.
133 Info The mirroring of this volume will be continued.
134 Info The mirroring of this volume will be continued.
135 Info A mirror will be created for this volume.
136 Warning A continue of the mirror could not be performed because the target
drive was out of sync with the source.
An automatic mirror resynchronization will be performed to ensure
that the source and target are in sync.
Volume Device: %t%1
137 Error The target side of the mirror creation has failed. There was an error creating the thread to handle the mirroring activities.
Error Code: 0xC0000055
Target volume is locked or corrupt. See if the volume is calling for a chkdsk or if a process has an open handle to the volume. (Check for Anti Virus sw)
144 Warning The volume could not be locked as requested. There was an error locking the volume.
Error Code: 0xC0000055
Target volume is locked or may be corrupt. See if the volume is calling for a CHKDSK in the event log or if a process has an open handle to the volume. (e.g. Check for Anti-virus software)
145 Error The volume could not be opened to lock it. There was an error opening the volume 0xC000022 or 0xC000000D 0xC000000D – Verify sector size of volume is 512 bytes
146 Info The volume has been locked as requested There was no error locking the volume. Standard message when locking a target volume (mirror create, lock volume command)
147 Warning The volume has been unlocked as requested There was no error unlocking the volume Standard message when unlocking a target volume (mirror delete, unlock target command)
148 Warning The volume has not been unlocked as requested There was an error opening the volume. The error code above is a driver status value.
Error Code : 0xC000026E
149 Info Open handles have been detected on this volume while trying to lock it. The EM driver will attempt to get an exclusive lock on this volume. Applications with open handles to this volume might report file corruption. Initial attempt to lock the volume so it can become the target – Information only
150 Error An invalid attempt to establish a mirror occurred. Both systems were found to be Source. This may have been due to all of LifeKeeper’s Comm Paths being disconnected, the reconnected later, or by bringing the mirror into service on each of the systems individually without being able to contact the other system. The mirror has been paused, or left in its current non-mirroring state. To re-establish the mirror, reboot the system which should become target and manually continue the mirror from the source while the other is booting. Otherwise, delete the mirror on both systems and manually recreate it. This is a SPLIT-BRAIN scenario where both systems believe they are the SOURCE of the mirror. Resolve using the DK GUI or the LK GUI
15 1 The target volume could not be accessed/locked during mirror creation.
This could be because other processes have open handles on this volume, or the filesystem is corrupted.
152 Info During the process of locking the target volume the driver has responded to IOCTL_DISK_IS_WRITABLE with a status code STATUS_MEDIA_WRITE_PROTECTED. The media is now write protected. Normal message for a Target volume during bootup
153 Warning The user has deleted the drive letter assignment from a volume that is part of a mirror. Unless the drive letter mapping is re-established, this mirror will not be in a usable state. Current Role: Target The volume letter currently defined in a DataKeeper mirror has been deleted from the OS. The mirror can no longer function.
154 The DataKeeper driver could not open the registry key.
155 Error The DataKeeper driver could not query the registry value. Volume Device:
Registry Value: MirrorRole
Error Code: 0xC0000034
156 Info Unable to get filesystem info (FSCTL_GET_NTFS_VOLUME_DATA).
160 Info BEFORE %t%1
161 Info AFTER %t%1
162 Warning Unable to allocate storage for RemoteTargetInfo structure.
163 Error The source system for this mirror has been changed. Previous Source: 192.168.3.90
New Source: 192.168.3.91
164 Error Unable to allocate storage during mirror creation.
165 Info Cannot unlock target volume during resync, or until a previously-interrupted resync has been completed. User attempted to unlock the target volume during a resync operation. This is not allowed as the data on the target volume is potentially unusable. Allow the resync to complete.
166 Warning The remote system reports that a different machine is now the
source for its mirror. The local mirror will be paused. To
re-establish the mirror with this system as source, delete the
current active mirror to the remote system, and continue the mirror from
this system.
167 Error Unable to connect to the volume port 0xC0000055 In DK prior to v7.1.2, there was a TDI disconnect issue where we often saw this problem. In that scenario, DK was deadlocked waiting for the target to respond. However, the target already resonpended to the source in a 0 byte reply which the source system doesn’t recognize. Reboot target system.
167 Error Unable to connect to the volume port Failed Operation = Connect
0xC0000120 – Port 10011
0xC0000236 – Port 0
0xC000023C – Port 10011
0xC000023D – Port 10011
This could be Port 0 or Port 100xx. If port 0, then problem on dispatch port (9999 by default). Verify SRC and TRG are communicating via same dispatch port. Verify no port 9999 conflict on Target. Also check to see if there is a leftover piece of the mirror still configured via GETMIRRORVOLINFO (seen during Switchover when mirror is recreating): Use SOLUTION 465 to troubleshoot
167 Error Unable to connect to the volume port Failed Operation = Read
0xC0000120 – Port 10011
0xC000020D – Port 10011
167 Error Unable to connect to the volume port Failed Operation = Targ Err
Port 0
Port 10004
This could be Port 0 or Port 100xx. If port 0, then problem on dispatch port (9999 by default). Verify SRC and TRG are communicating via same dispatch port. Verify no port 9999 conflict on Target. Also check to see if there is a leftover piece of the mirror still configured via GETMIRRORVOLINFO (seen during Switchover when mirror is recreating): Use SOLUTION 465 to troubleshoot
168 Error Unable to initialize mirror on the target machine. Failed Operation: Dispatch Port Connect:
Error Code: 0xC0000120
Error Code: 0xC0000236
Dispatch Port = 9999 by default. Reboot Target, verify no port conflict on 9999 on Target – for 0xC0000236, check for ClearSwitchover event id 200 on TARGET
168 Error Unable to initialize mirror on the target machine. Failed Operation: Target reports error
Error Code: 0xC0000236
ErrorCode: 0xC0000055
ErrorCode: 0xC000100x
0055 is a semaphore timeout and DK is usually locked… saw that with TDI disconnect issues (TDI disconnect issues were resolved in DK v7.1.2)
168 Error Unable to initialize mirror on the target machine. Failed Operation: Named Pipe Connect
Error Code: 0xC00000BE
168 Error Unable to initialize mirror on the target machine. Failed operation: Read Response
Error Code: 0xC0000120
168 Error Unable to initialize mirror on the target machine. Failed operation: Named Pipe Connect look for Event ID 200 on Target side to see if CLEARSWITCHOVER FLAG is set
169 Warning Unable to create bitmap to track writes on the target volume. This volume will not be able to be unlocked in read-write mode until a successful bitmap creation occurs, following a full or partial resync with the source, or following a reboot.
176 Error Unable to allocate memory for bitmap – mirror creation has failed
177 Error Unable to create persistent file for bitmap. The persistent bitmap for this mirror will be marked Invalid. Error Code 0xC0000022
Error Code: 0xC000007F
Error Code: 0xC0000034
178 Warning Unable to delete persistent bitmap file.
179 Error Unable to create BitmapWrite thread. The persistent bitmap for this mirror will be marked Invalid.
180 Error The BitmapBaseDir value is not found in the ExtMirr\Parameters registry key, or the value found is not a valid path. Persistent Bitmap file creation will be disabled.
The BitmapBaseDir value should be a REG_SZ value that contains the full path to the directory where persistent bitmaps should be created – normally the Bitmaps directory in the DataKeeper install directory.
181 Error Unable to set the BitmapFileEnabled flag.
182 Error Unable to set the BitmapFileValid flag.
183 Error Unable to read data from the persistent bitmap file.
184 Error Unable to write data to the persistent bitmap file.
185 Error Unable to allocate memory to report target dirty bitmap. Mirror will be paused on the source system.
186 Error Unable to receive target’s dirty bitmap list. Error Code: 0×102 (Status timeout)
Error Code: 0xC0000240
During initialization of resync, there was a communication error retrieving the list of dirty blocks from the target system.  Usually due to bad network.  C00000240 is STATUS_REQUEST_ABORTED – this just comes from the TCP driver.
187 Error Unable to allocate memory to read bitmap file. The persistent bitmap for this mirror has been marked invalid.
188 Error Unable to determine sector size or filesystem cluster size for disk where bitmap files are stored. The persistent bitmap for this device cannot be created. Please verify that the BitmapBaseDir registry value in the ExtMirr driver Parameters key is set to the correct path. BitmapBaseDir is currently set to >. Occurs during CREATE MIRROR Check to make sure user is logged in with domain admin privileges. Saw this where customer was a Domain User with Local Admin rights. Bitmap file never got created until we logged in with Domain Admin privs. Sequence is Event 188, 177, 210
189 Error Failover was detected on this volume. The Persistent Bitmap file was not in a valid state when the system went down, so a full resync will be performed.
192 Error ending disk write tracking during switchover of volume %2. Remaining mirror creation will require full resync.
196 Warning An attempt to merge the bitmap from a writable target was made, but the bitmap
bitmap file for one or more targets was not valid. Bits cannot be saved – a
full resync to all targets is required after switchover.
197 Warning An attempt to merge the bitmap from a writable target was made, but the target
was not successfully queried for its bitmap file report, possibly due to a
network failure. A full resync to all targets will be required after
switchover.
198 Warning The drive letter (2:) was unassigned from the volume containing DataKeeper bitmap files.
199 Error Mirror creation failed due to an error creating the persistent bitmap file.
200 Error Target-side mirror creation failed due to the switchover flag being set for this volume (G:). Use the CLEARSWITCHOVER option in EmCmd to clear this flag. Use the CLEARSWITCHOVER option in EmCmd to clear this flag.
201 Info
202 Info The DataKeeper driver has detected that networking is now available.
203 Error Mirror switchover failed due to the error below. Reason: Unable to lock volume
Reason: Unable to delete mirrors
204 Error Target Dispatch thread detected a conflict on port 000000000100300001000000CC00A0CD000000000000000000000000000000000000000000000000. This port may be in use by some other service or application. Reboot system or see if there is a port conflict on Dispatch Port (9999 by default)
205 Info Creating bitmap file in default location for volume P:\ for target 192.168.1.206 Info only – no action required
206 Info Creating bitmap file on shared volume I:\ for target 80.80.90.135. Info only – no action required
207 Error Unable to determine sector size or filesystem cluster size for shared disk. The persistent bitmap for this volume to the target machine listed below cannot be created.
208 Error Unable to allocate memory during persistent bitmap file creation. The persistent bitmap for this volume to the target machine listed below cannot be created.
209 Error The persistent bitmap file for this mirror is invalid, but there was an error creating the shared invalid file. All writes to this volume will be failed until the system is rebooted.
210 Error There was an error writing to or reading from the persistent bitmap file for this mirror. The persistent bitmap file will not be used.
211 Error The shared volume is now being used by another system. This system will block access to the volume, and any mirrors that were in place will be deleted.
212 Info Successfully created new bitmap file for volume I:\ for target 80.80.90.135.
213 Info Pending multi-target switchover to source for volume I: complete.
214 Error Ending disk write tracking during switchover of volume %2. Remaining mirror creation will require full resync.
215 Error Write tracking is off during switchover of volume %2. Creating mirror to target %3 with full resync.
216 Info Conditional mirror create fails for volume Q due to incorrect role.
217 Info Correct role for conditional mirror create on volume S
218 Cannot restore mirror for volume %2 on shared target.
219 Warning A full resync of volume I to target IP 80.80.90.135 is needed. FULL RESYNC
220 Info Resync of volume to target IP 80.80.90.135 starting with 524288 bytes to resync. PARTIAL RESYNC Info only – no action required
222 Error Volume ? is being removed from the system while still part of a mirror
223 Warning Mirror was Paused due to system shutdown; reverting state to Mirroring to
avoid split brain
225 Error Target volume size is smaller than source.
226 Error Global bitmap volume %2 has not been detected yet. Mirror source threads may hang if this volume does not exist. Check to make sure that the BitmapBaseDir registry entry specifies a valid volume for storage of bitmaps.
227 Error Snapshot %3 operation for volume %2 failed with status %4. Disabling snapshot and locking volume.
228 Info Snapshot successfully enabled for volume %2
229 Info Snapshot for volume %2 disabled.
230 Warning Request to initiate snapshot on target %2 volume %3 failed. Mirror was not in the mirroring state at the time of the request.
231 Warning “Request to initiate snapshot on target %2 volume %3 failed with status %4.
232 Warning Unable to read Snapshot Device from registry for volume %2.
233 Warning Invalid Snapshot Device registry value for volume %2. Line %3.
234 Warning Cannot enable snapshot for volume %2 – volume size is 0.
235 Warning Cannot enable snapshot for volume %2 – bitmap allocation failed – out of memory.
236 Warning Cannot enable snapshot for volume %2 – snapshot thread creation failed with status %3.
237 Warning While disabling snapshot for volume %2, unable to lock volume (status %3).
238 Error Volume %2: Mirror role is Source, but no targets found in the registry. Changing role to None and forcing full resync.
239 Info Wrote the following string to SharedOwner file on volume %2:
240 Info Read the following string from SharedOwner file on volume %2:
241 Warning Data read from the shared owner file on volume %2 was unexpected – does not appear to be a string.
242 Warning Data to be written to the shared owner file on volume %2 was unexpected – does not appear to be a string.
243 Error Cannot claim ownership of shared volume %2 – Unable to start the Shared Owner watch thread, status %3.
244 Error Cannot claim ownership of shared volume %2 – unable to create Shared Owner file, status %3.
245 Error Cannot claim ownership of shared volume %2 – unable to get our ComputerName, status %3.
246 Error Cannot claim ownership of shared volume %2 – unable to allocate buffer for shared file I/O, status %3.
247 Error Failed to read or write Shared Owner file for shared volume %2. Status %3.
248 Error During volume lock of shared volume %2, failed to initiate thread to modify Shared Owner file, status %3.
249 Error Unable to unlock shared volume %2, failed to claim shared owner file, status %3.
250 Warning Unable to allocate target sequence tracking array. This is not a major error but may result in a full resync in the event of a failover.
251 Info Successfully allocated target sequence tracking array.
252 Warning Unable to allocate target sequence tracking list entry. This is not a major error but may result in a full resync to some targets in the event of a failover.
253 Error An invalid packet payload of type %2 was encountered.
254 Error A received packet payload goes over the end of the total packet size.
255 Error The data received in the packet payload was not in the expected form.
256 Warning Received a duplicate packet payload of type %2.
257 Warning Unable to allocate a flush header – this may indicate a memory shortage. It is not a critical DataKeeper error.
258 Warning DataKeeper sequence number tracking encountered a condition that could lead to a full resync.
259 Warning DataKeeper sequence number tracking encountered a condition that could lead to a full resync to the given target.
260 Warning DataKeeper sequence number tracking encountered a condition that requires a full resync.
261 Warning DataKeeper sequence number tracking encountered a condition that requires a full resync to the given target.
262 Error An invalid response packet was received from the target system. A display of the relevant sequence numbers is given below.
263 Error Unable to set the value for the mirror.
264 Error The state of this mirror changed to a Non-Mirroring state, but the cluster was not notified within the specified timeout. All pending writes to this volume will be failed, and the volume will be locked.
265 Error The state of this mirror changed to a Non-Mirroring state, but the attempt to notify the cluster failed. All pending writes to this volume will be failed, and the volume will be locked.
266 Warning An invalid attempt to establish a mirror occurred. The volume on the remote system is now a Target for a different Source system.
267 Warning Mirror create fails for shared volume %2 – ineligible to become a target.
268 Warning Unable to allocate storage for SavedBitmapInfo structure during switchover.
269 Warning Unable to allocate an MDL packet in the current chaining loop (#%2). This may indicate a memory shortage. It is not a critical DataKeeper error.
270 Error Unable to initialize RemoteTargetInfo structure.
271 Error Unexpected device removal during mirror initialization – aborting mirror creation.
272 Error An invalid attempt to establish a mirror occurred. Both systems were found to be Source.
273 Error Source and target volume sector sizes don’t match.
274 Error Unexpected device removal – driver was not previously notified to clean up.
275 Info Initiate switchover to source for volume %2.
276 Error Switchover to source for volume %2 failed – %3.
277 Error An invalid attempt to establish a mirror occurred. Both systems were found to be Source.
278 Error At the last reboot, there were writes on volume %2 which were not tracked in a persistent bitmap. A full resync of this volume is required.
279 Info Incoming writes are being temporarily blocked in order to allow mirror resync to complete.
280 Info Resync complete – unblocking writes.
281 Error The resync unblock timer expired – unblocking writes and terminating resync.
288 Error The state of this mirror changed to a Non-Mirroring state, but the cluster was not notified within the specified timeout. The volume will be unlocked and writes resumed. Use the DataKeeper GUI “Pause and Unlock All Mirrors” to unlock target volumes. Increase the size of the volume on each target system to be greater than or equal to the size of the source system’s volume. Finally, use the DataKeeper GUI “Continue and Lock All Mirrors” to reconnect the mirror – a partial resync will occur. It is recommended that future resize operations follow the guidelines described in the “DataKeeper Volume Resize” topic of the Technical Documentation located at docs.us.sios.com.
289 Error DataKeeper has detected that volume %2 was not paused by the user prior to increasing the size of the volume on the source system. This mirror will be paused and must be manually reconnected after the target system’s volume has been resized to match the source system’s volume.
290 Error DataKeeper has detected that volume %2 was resized on the source system during resync. This mirror will be paused and must be manually reconnected after the source system’s volume has been reduced in size to be smaller than or equal to the size of the target volume. To recover, reduce the size of the volume on the source system. Then use the DataKeeper GUI “Continue and Lock All Mirrors” to reconnect the mirror – a partial resync will occur. After the resync completes, you can increase the size of both volumes by following the guidelines described in the “DataKeeper Volume Resize” topic of the Technical Documentation located at docs.us.sios.com. If the source system volume cannot be reduced in size, this mirror must be deleted and recreated.
291 Error DataKeeper has detected that volume %2 was not paused by the user prior to resizing the source volume. This mirror will be paused and must be manually reconnected after you resolve the volume size mismatch. See the System event log messages on the target system for more information on how to recover. It is recommended that future resize operations follow the guidelines described in the “DataKeeper Volume Resize” topic of the Technical Documentation located at docs.us.sios.com.
292 Error The volume which contains DataKeeper bitmap files has not been registered yet. DataKeeper mirrors will not function until the bitmap volume is present. BitmapBaseDir is set to %2.
293 Info Wait for the DataKeeper bitmap volume has expired – allowing mirrors to become active.
294 Info DataKeeper bitmap volume %2 has been registered.
295 Error Failed to update the bitmap file location registry value for the mirror. Bitmap file will be closed and marked as invalid.
296 Error Failed to retrieve the ExtMirrBase environment variable from the registry. Mirrors will not be operational. Please verify that ExtMirrBase is defined in HKLM\\System\\CurrentControlSet\\Control\\Session Manager\\Environment, and reboot this system.

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