HP A3550A - High Availability Disk Arrays Model 20 Storage Enclosure User Manual page 106

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Failing Continue after
component failure?
Disk module Yes
SP Yes*
Fan failure Yes
within fan pack
Power supply Yes
SCSI-2 adapter/ No*
cable
What happens and how to recover
Provides the same features as the basic configuration
but with better performance and higher availability.
Applications continue running. System Administrator or
service provider replaces module.
If one SP fails, the System Administrator can access the
LUNs owned by the failed SP by accessing the
remaining operational SP with the other host. If a host
adapter fails, the System Administrator can access the
LUNs in the array with the other host adapter. The
System Administrator must change the path and SP
ownership of the LUNs for the failed SP or failed host
adapter by using LVM (applies to HP-UX 10.x and later)
and Grid Manager, respectively. There is no automatic
transfer of LUN ownership or path for this configuration
type.
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 and System
Administrator restarts the operating system, if necessary.
I/O operations fail to all physical disk units configured on
SP attached to a failed SCSI-2 adapter/cable. System
Administrator can transfer control to the other SP by
changing host(s) and array configurations.
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