Installation guide

Glossary
Manual No. 775064 G-9
Note
The standby rebuild will only happen on the SAME
Mylex RAID controller, never across Mylex RAID
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.
Striping
Refers to the storing of a sequential block of incoming data across multiple
SCSI drives in a group. For example, if there are 3 SCSI drives in a group,
the data will be separated into blocks and block 1 of the data will be stored
on SCSI drive 1, block 2 on SCSI drive 2, block 3 on SCSI drive 3, block 4
on SCSI drive 1, block 5 on SCSI drive 2 and so on. This storage method
increases the disk system throughput by ensuring a balanced load among all
drives.