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A-2
Glossary
automatic rebuild on replacement
In the event of a drive failure in a SAF-TE or SES enclosure
attached to a controller with no available hot spares, if rebuild on
replacement is enabled then when the failed drive is replaced with
a new drive, a rebuild will start automatically.
available space
Unused space on an initialized disk from which logical devices
(arrays) are created. When an array is deleted, the space that it
used is returned to the available space pool.
Also called available segment.
B
bad segment
Segment that is in an unknown state.
background consistency check
Option that forces the controller to constantly check all portions of
disks used by all arrays to see if the disks can return data from the
blocks. On a fully-redundant RAID 5 with no dead segments, the
controller will repair any data that it cannot read. See also
consistency check command.
battery
In the event of a power failure, a battery supplies power to
maintain data in the RAID controller’s cache, thereby permitting
any dirty data in the cache to be flushed to the drives when power
is restored. See also battery reconditioning, dirty data.
battery reconditioning
Periodic discharge/recharge that conditions the battery to attempt
to regain lost capacity. Does not apply to all types of battery.
blink
Command that blinks the drive LEDs of all hard disks in a selected
array or of a single selected hard disk.
bootable array
Array configured as the boot device.
UG.book Page 2 Saturday, October 26, 2002 12:08 PM