HP XP1024 System Configuration Manual page 36

Error Condition
The logical devices are not recognized by
the host.
The host does not reboot properly after hard
shutdown.
Physical volumes cannot be created.
Logical volumes cannot be created.
A file system cannot be created.
36
Troubleshooting
Recommended Action
Verify that the READY indicator lights on the
disk array are ON.
Verify that fiber cables are correctly installed
and firmly connected.
Verify that the target IDs are properly
configured. The LUNs for each TID must
start at 0 and continue sequentially without
skipping any numbers.
Verify that the TIDs/WWNs on each bus
are unique. Do not install two devices with
the same ID on the same bus. Recheck the
buses for new devices.
Verify that LUSE devices are not intermixed
with normal LUNs on the same port.
Verify that the maximum number of LUSE
devices per port has not been exceeded.
Verify that the disk array host mode is set
correctly.For Tru64 v4, the emx_data.c
mappings can cause devices not to be
recognized.
Verify the data in the emx_data.c file
correctly maps each WWN to a TID
between 0 and 7. For Tru64 v4, make sure
TID 8 and above are not used.
If you power off the host without executing
the shutdown process, wait three minutes
to allow the disk array's internal timeout
process to purge queued commands. If
the host restarts while the disk array is
processing queued commands, the host may
not reboot successfully.
Verify that the disk array logical devices are
correctly formatted.
Verify that the volume capacity for OPEN-x
volumes is not greater than the maximum
capacity allowed. See
emulations for capacities.
Verify that the capacity of the volume group
is not less than the total capacity of the
partitioned logical volume.
Verify that logical volume name is a
character-type volume.
Disk array device