HP StorageWorks Continuous Access EVA Administrator Guide (T3687-96043, December 2005)

6 Troubleshooting
This chapter provides troubleshooting guidance for arrays and links between multiple sites.
Synchronizin
g replication manager log files
The replicati
on manager server and host agents generate log fi les for job events. These detailed event
log files can be
helpful to HP suppor t personnel when troubleshooting replication jobs. Ensure the
usefulness o
f these logs by synchronizing the array clocks to the management server (see Synchronize
management servers and arrays).
Troubleshooting the environment
When p roblems occur in remote replication op erations, inspect the environment for changes. Fo r
example, look for changes in:
• Intersite network performance or bandwidth
• Application users or versions
• Number and type of applications
• Array configuration, including disk losses and subsequent reconstruction
Troubleshooting the SAN
• Use IP network analyzers to examine network performance.
• For each s
witchinafabric,confirm that all host ports are on the correct fabrics.
• For each array, confirm that all c ontroller ports are on the correct fabric.
• Check performance on each switch por t.
Troubleshooting arrays
Use HP Command View EVA or the replication manager to check a rray status. If either array is not
displayed, there could be a zoning problem. If both arrays are displayed, examine the source array first:
• Are all ports working?
• Are D R groups replicating?
• Are the source virtual disks presented correctly?
Then check the status of the destination array:
• Are all ports working?
• Are destination virtual disks and DR groups available?
When a destination array is offline
HP recommends that you suspend DR groups when the destination array is offline. This prevents potential
issues such as loss of host access to source virtual disks if the source array is restarted while the
destination array is unavailable. By design the array does not present virtual disks to host servers if it
cannot determine the source/destination status of the remote virtual disk.
If ho
sts lose access to source virtual disks af ter the array is powered off and on, consider the possibility
that the destination array is offline. To confirm, check the controller event log for the event code
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