ICP RS Series User Manual page 130

130
After selecting Configure Host Drives, ICPCON displays a list of already existing Host
Drives. With a new system this list will show no entries. In this example there is already one
Host Drive available. It's name is "RAID 5" and it is an RAID 5 Array Drive (with approx.
17GB capacity). The status is "ready". I.e., this Host drive is fully available and redundant.
The following states for RAID Host Drives are possible:
"Idle" State
This state is characterized by the fact that the redundant information of the disk array has
never been entirely created. The disk array is in this state after its first configuration and
until you quit ICPCON. If an error should occur while the array is in the build state, the array
returns to the idle state (exception: if during build mode the dedicated drive of RAID 4 fails,
the mode changes to fail).
"Build" State
After the disk array has been configured for the first time, it assumes the build state as soon
as you quit ICPCON. While the array is in the build state, redundancy information is calcu-
lated and stored to the hard disks of the array.
"Ready" State
The disk array is fully operational when in the ready state. All redundant information is pre-
sent, that is, a hard disk can fail without impairing the functionality of the disk array. This is
the normal state of a disk array. The state ready/expand indicates, that the RAID level and/or
capacity are currently migrated/expanded.
"Fail" State
The disk array changes to the fail state whenever a Logical Drive fails. Redundancy informa-
tion is still present, thus allowing the remaining hard disks to continue working. This state
should be eliminated as soon as possible by replacing the defective hard disk. If a so-called
Hot Fix drive has previously been assigned to a disk array with ICPCON, the controller will
automatically replace the defective drive and start the reconstruction of the data and the
redundant information. Therefore, under these circumstances the fail state is only tempo-
rary and will be eliminated by the controller itself.