C Troubleshooting - HP StorageWorks MPX200 Solution Manual

C Troubleshooting

Table 14 on page 169 lists some problems that may occur with the data migration service and provides
a possible reason or solution for each.
Table 14 Troubleshooting
The show array command either:
• Does not show any array entities.
OR
• Does not show all the controller ports zoned
in with the HP MPX200 router.
The migration add command does not show
any source or destination array.
The migration add command fails to start a
job.
Setting the array bandwidth does not cause any
change in the data transfer rate in show perf
output.
Migration failover to active path does not occur.
A migration job goes into running state, halts at
the Running (0% complete) state for awhile, and
then fails.
Problem Cause and Solution
Ensure that the zoning is correctly set up on the switches.
Ensure that the show targets command is not showing
any entry for the array. If show targets is showing an
entry for the target array, it means that the HP MPX200
router is zoned correctly, but no data LUNs are mapped to
the HP MPX200 router ports. Add masking for the required
data LUNs so that they are seen by the HP MPX200 router.
For more information, see
By default, the target type attribute for an array is Unknown.
Use the set array command to set it appropriately.
Verify that the arrays are still visible and online.
Array bandwidth is a "source-only" feature. Make sure that
the bandwidth setting has been configured on the array that
contains the source LUN. If the setting is configured on the
array holding the destination LUN, no effect is seen.
Ensure that both the HP MPX200 router ports are correctly
masked for the LUN under consideration, and that both
controllers are correctly zoned with both the HP MPX200
router Fibre Channel ports.
Make sure that the controller ports zoned for the accessing
source and destination array LUNs also own the respective
LUNs. In other words, if the source LUN is being accessed
by the HP MPX200 router through a controller port belong-
ing to Controller A while the LUN is actually owned by
Controller B, the HP MPX200 router allows you to configure
a migration job but is not able to do any data access oper-
ations for that LUN.
MPX200 Multifunction Router Data Migration
"show targets" on page 141.
169