HP A3550A - High Availability Disk Arrays Model 20 Storage Enclosure User Manual page 115

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Failing Continue after
component failure?
Disk module Yes (9.04)
Yes (10.x)
SP *No (9.04)
Yes (10.x)
Fan pack Yes (9.04)
Yes (10.x)
Power supply Yes (9.04)
Yes (10.x)
SCSI-2 adapter/ *No (9.04)
cable *No (10.x)
4-8
What happens and how to recover
Applications continue running. System Administrator or service
provider replaces module.
Provides the same features as the basic configuration, but with
better performance and higher availability. Applications can
continue to run after the failure of a single disk module.
HP-UX 9.04
If one SP fails, the System Administrator must reassign
ownership of the failed SP's LUNs to the operational SP by
using Grid Manager. Also, the path to the operational SP must
be used and can be changed by using LVM. Once these
changes have been made, access to all LUNs on the array is
possible.
HP-UX 10.x
If one SP fails, ownership of the failed SP's LUNs can transfer
automatically to the remaining operational SP. If a primary and
an alternate path have been configured in LVM, LVM switches
automatically to the alternate path. These operations are
transparent to the user.
Applications continue running. System Administrator or service
provider replaces module.
If a redundant power supply module is present, applications
continue running; otherwise, disk array fails. Service provider
replaces power supply. The System Administrator restarts the
operating system if necessary.
If the SCSI-2 adapter fails, no I/O operations are possible
between the host and the array. Authorized service provider
replaces adapter or cable and System Administrator restarts
operating system and applications. If the SCSI-2 adapter fails,
no I/O operations are possible between the host and the array.