Mylex eXtremeRAID 1100, Installation Manual

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Glossary
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A “Standby” disk can be created in one of two ways:
3. When a user runs RAID EzAssist, all disks attached to the controller
that are NOT configured into any drive group will be automatically
labeled as “standby” drives.
3. A disk may also be added (attached at a later time) to a running system
and labeled as standby by using the “DAC1164 Software Kit” (see
appropriate chapters for DAC1164 utilities for a particular operating
system).
During the automatic rebuild process, system activity continues as normal.
System performance may degrade slightly during the rebuild process.
☛
Note
The standby rebuild will only happen on the SAME
DAC1164 controller, never across DAC1164
controllers.
To use the standby rebuild feature, you should always maintain a standby
SCSI disk in your system. When a disk fails, the standby disk will
automatically replace the failed drive and the data will be rebuilt. The system
administrator can disconnect and remove the bad disk and replace it with a
new disk. The administrator can then make this new disk a standby.
Stripe Order
The order in which SCSI disk drives appear within a drive group. This order
must be maintained, and is critical to the controller’s ability to ‘Rebuild’
failed drives.
Stripe Size
The stripe size is defined as the size, in kilobytes (1024 bytes) of a single I/O
operation. A stripe of data (data residing in actual physical disk sectors,
which are logically ordered first to last) is divided over all disks in the drive
group.
Stripe Width
The number of striped SCSI drives within a drive group.