Installation guide

Glossary
Manual No. 775064 G-7
until a change is made either by using a system level utility or after a rebuild.
Each of the states is described below:
Ready: A SCSI disk drive is in a “ready” state if it...
Is powered on; and
Is available to be configured during the current session but remains
unconfigured.
Online: A SCSI disk drive is in an “online” state if it...
Is powered on; and
Has been defined as a member of a drive group; and
Is operating properly.
Standby: A SCSI disk drive is in a “standby” state if it...
Is powered on; and
Is able to operate properly; and
Is defined as part of a group, as a standby device; and
Is NOT part of a logical drive.
OFFLINE: A SCSI disk drive is in an “offline” state if it...
Is not present; or
If it is present but not powered on; or
If it failed to operate properly and was taken offline by the controller.
When the controller detects a failure on a disk, it takes that disk offline by
changing its state to “offline.” A SCSI drive in an offline state does not
participate in any I/O activity. No commands are issued to offline drives.
Rebuild: A SCSI disk drive is in a “rebuild” state...
While it is in the process of being rebuilt. During this process, data is
regenerated and written to the disk drive. This state is also referred to as
‘Write-Only’ (WRO).