Specifications

2–56 Compaq StorageWorks HSG80 Array Controller ACS Version 8.5 Maintenance and Service Guide
Replacing a Failed Storageset Member
If a disk drive fails in a RAIDset or mirrorset, the controller automatically places it into
the failedset. If the spareset contains a replacement drive that satisfies the storageset
replacement policy, the controller automatically replaces the failed member with the
replacement drive. If the spareset is empty or does not contain a satisfactory drive, the
controller simply “reduces” the storageset so that it can operate without one of its
members.
The storageset remains in this “reduced” state until the spareset contains a satisfactory
drive. If the controller senses a satisfactory drive in the spareset, it automatically places
the drive into the storageset and restores the storageset to normal. Therefore, replacing a
failed storageset member means putting a satisfactory drive into the spareset.
Removing a Failed RAIDset or Mirrorset Member
Use the following steps to remove a failed RAIDset or mirrorset member:
1. Connect a PC or terminal to the controller maintenance port that accesses the reduced
RAIDset or mirrorset.
2. Enable AUTOSPARE with the following command:
SET FAILEDSET AUTOSPARE
With AUTOSPARE enabled, any new disk drive—one that has not been in an array
before—inserted into the Port-Target-LUN (PTL) location of a failed disk drive is
automatically initialized and placed into the spareset.
3. Remove the failed disk drive.
Installing the New Member
Use the following instruction to install a new member:
NOTE: The controller automatically initializes a new disk drive and places it into the spareset.
As soon as the disk drive becomes a member of the spareset, the controller automatically uses
it to restore the reduced RAIDset or mirrorset. If initialization of the new disk drive fails, it is
placed into the failedset.
Insert a new disk drive that satisfies the replacement policy of the reduced storageset
into the PTL location of the failed disk drive.