Installation guide

G-8 DAC960PG/PJ Installation Guide
Rebuild: A SCSI disk drive is in a “rebuild” state...
While it is in the process of being rebuilt. During this process, data is
regenerated and written to the disk drive. This state is also referred to as
‘Write-Only’ (WRO).
Segment Size
The Segment Size function is set in conjunction with stripe size and
represents the size of the data “chunk” that will be read or written at one
time. Under DACCF, the segment size (also known as “cache line size”)
should be based on the stripe size you selected. The default segment size for
Mylex DAC960 controllers is 8K.
Session
Refers to the period of time between any two consecutive system shutdowns.
System shutdown may be either a power off/on, or a hardware reset.
Standard Disk Drive
This term refers to a hard disk drive with SCSI, IDE, or other interface, that
is attached to the host system through a standard disk controller.
Standby Replacement of Disks (“Hot Spare”)
The “Standby Replacement” (or “Hot Spare”) is one of the most important
features the controller provides to achieve automatic, non-stop service with a
high degree of fault-tolerance. The rebuild operation will be carried out by
the controller automatically when a SCSI disk drive fails and both of the
following conditions are true:
A “standby” SCSI disk drive of identical size is found attached to the
same controller;
All of the system drives that are dependent on the failed disk are
redundant system drives, e.g., RAID 1, RAID 3, RAID 5, RAID 0+1.