HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Maintenance and Service Guide (EK-G80MS-SA. C01, March 2005)

Common Replacement Information and Procedures
83HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software
Maintenance and Service Guide
Handling storagesets, mirrorsets, stripesets, RAIDsets and
JBODs
The following subsections provide information on handling complex storageset,
mirrorset, stripeset, RAIDset and JBOD issues.
Replacing failed storageset members
If a disk drive fails in a RAIDset or mirrorset, array controllers automatically
place the disk drive into the failedset. If the spareset contains a replacement disk
drive that satisfies the storageset replacement policy, the array controllers
automatically replace the failed member with the replacement disk drive. If the
spareset is empty or does not contain a satisfactory disk drive, the array
controllers simply reduce the storageset so that the storageset can operate without
one of the members. The storageset remains in this reduced state until the spareset
contains a satisfactory disk drive. If the array controllers sense a satisfactory disk
drive in the spareset, the array controllers automatically place the disk drive into
the storageset and restores the storageset to normal. Therefore, replacing a failed
storageset member means putting a satisfactory disk drive into the spareset.
Note: For supported replacement procedures, see the “Replacing a disk drive” section
that starts on page 94.
Note: Depending on the system load and the number of drives installed, you may
need to wait 1 to 5 minutes between the removal and installation of a replacement
disk in order for the replacement procedure to complete properly.
Tip: With ACS 8.8- x , all disk drives with model numbers beginning with B (for
example, B
00721937 ) use auto-read-reallocate (ARRE) functionality. ARRE allows
drives to resolve recoverable errors and properly handle block replacements.