Accusys ExaRAID GUI - Manual (Page 93)

Using the RAID GUI
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• BANISH: The partition is lost (the member disk is removed or faulty)
and it results in a degraded logical disk. The data on the banish
partition will be out of sync with data on other partitions. The data on
the banish partition can’t be used after recovery.
• REBUILD: The member disk of the partition has been added to the
logical disk, and the partition is rebuilding the data.
• UNTRUST: The member disk of the partition has been added to the
logical disk, but the data on the partition cannot be trusted. It can
become trusted if the logical disk can rebuild the data on the
partition.
• Partition state transition
The corresponding events and state transitions of a partition are shown in
the table below:
Before logical disk recovery, make sure the following:
• There are enough hard disks in the disk group.
• No background tasks in progress, such as disk rebuilding or RAID
reconfiguration.
From To
Disk is failed or removed .
OPTIMAL
FAULTY: for faulty logical disk
BANISH: for degraded logical disk
REBUILD BANISH
UNTRUST BANISH
Lost member disk is replaced by a new disk for disk rebuilding.
FAULTY UNTRUST (The logical disk is not recoverable.)
BANISH
UNTRUST
(and later to REBUILD)
Lost member disk is restored to a disk group by the ARU.
FAULTY OPTIMAL
BANISH
UNTRUST
(and later to REBUILD)
Force to recover a logical disk by the ARU.
UNTRUST OPTIMAL
Force to recover a logical disk by the ARU.
UNTRUST REBUILD
The partition completes data rebuilding.
REBUILD OPTIMAL
Table 2-12 State transition