Glossary
Manual No. 775029
G-29
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.
Sub-system Storage
A collection of disks providing data storage space to a system user.
Sustained Data Transfer Rate
A rate of data transfer defined for continuous operation at a maximum speed
level.
Synchronous data transfer
Data transmission synchronized to a defined time interval; faster than
asynchronous SCSI because there is no wait for acknowledgement of each
byte from the receiving device.
System Disk
The disk on which a system’s operating software is stored.
System Drives
See Logical Drives
Target ID
A target ID is the SCSI ID of a device attached to a DAC960 controller. Each
SCSI channel can have up to 15 attached SCSI devices (target ID from 0 to
6, and 8 to 15).
