HP A3550A - High Availability Disk Arrays Model 20 Storage Enclosure User Manual page 121

ÃÃ
Failing Continue after
component failure?
Disk module Yes
SP Yes
Fan pack Yes
Power supply Yes
SCSI-2 adapter/ *No
cable
4-14
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.
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.
I/O operations fail to all physical disk units configured on SP
attached to a failed SCSI-2 adapter/cable. The System
Administrator can transfer control to the other SP by host(s)
and array configuration changes. If the SCSI-2 adapter or
SCSI-2 cable fails, no I/O operations are possible between the
host and the array.