User guide

Causes and solutionsProblem
Causes:You cannot create FS pairs.
• There are not enough cache management devices.
• There are not enough resources depending on cache management devices.
• The conditions to create the pair are not fulfilled.
• The status of the specified volume is not shown because an FS pair is being deleted.
Solutions:
• Ensure that there are enough cache management devices to create the pairs.
For more information, see “Fast Snap cache management device requirements” (page 32).
• If cache management devices are running out, delete the unnecessary external volumes,
V-VOLs, or all the FS pairs related to the P-VOL.
• Fulfill the conditions to create the pair and try creating the pair again.
• Increase the resources depending on cache management devices. To do this, delete the
unnecessary external volumes, V-VOLs, or all the FS pairs related to the P-VOL. Delete them
until the following formula is satisfied:
The number of external volumes + the number of V-VOLs + the number
of P-VOLs of FS pair <= 59,136.
• Complete the following:
1. In the Local Replications window, confirm that the volume status has changed to “SMPL”
(the status is not shown).
2. Try the pair creation again.
• Run RAID Manager's inqraid command and verify that the volume is not used by FS, and
then try the pair creation again.
Causes:FS pairs are not shown in the
volume list.
• The pairs are not created.
• Displaying of the pairs is prohibited by the filtering function.
Solutions:
• Create the pairs.
• Change the settings in the Display Filter dialog box.
Cause: A volume is blocked because a failure occurred in the hard disk drive.An error occurred while
restoring the pair.
Solution: Delete the pair that is blocked, and contact HP Technical Support.
Causes:A volume is blocked.
• A failure occurred in two or more hard disk drives.
• The breaker was turned off once and then the power supply switched on.
Solution: Ask the HP Technical Support for assistance.
Cause: Access to the volume is rejected.A problem occurred in the host
application for monitoring the
volumes.
Solution:
1. Stop the host application monitoring the volumes.
2. Change all pair statuses to PSUS.
3. Start the monitoring application on the host.
To check whether the host has access to pair volumes, see “Pair status” (page 14).
Cause: Access to the volume is rejected.You booted/rebooted the host
server or ran the command for
Solution:
recognizing a device, but the
1. Stop the host application monitoring the volumes.
V-VOL is not correctly
recognized.
2. Split the pairs (“PSUS” status).
3. Reboot the host server or run a command that causes the system to recognize the device.
4. Start the host application monitoring the volumes.
General troubleshooting 65