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Chapter 3: FastBuild Utility
19
Define Array Definition Menu
Selecting an Array from the Define Array Menu brings up the Define Array
Definition Menu screen (below). First, choose the RAID Level you want. In the
Define Array Definition Menu section, press the Spacebar to cycle through array
types:
•
RAID 0 (Striping)
•
RAID 1 (Mirroring)
•
RAID 0+1 (Striping / Mirroring)
•
RAID 5 (Data / Parity Striping)
•
JBOD (Single Drive)
See the explanations on the following pages for more information about each
RAID Level and the options that come with them.
Gigabyte Boundary
– The Gigabyte Boundary feature is designed for fault
tolerant arrays (RAID 1, 0+1 and 5) in which a drive has failed and the user
cannot replace the drive with the same capacity or larger. Instead, the Gigabyte
Boundary feature permits the installation of a replacement drive that is slightly
smaller (within 1 gigabyte) than the remaining working drive (for example, an
80.5 GB drive would be rounded down to 80 GB). This can be helpful in the event
that a drive fails and an exact replacement model is no longer available.
For the Gigabyte Boundary feature to work, the Gigabyte Boundary feature must
be set to ON when the original array is created. When enabled, the Gigabyte
Boundary feature rounds the drive capacity of all drives to the common whole GB
drive size. For example, with the Gigabyte Boundary feature enabled, the
remaining working drives can be 80.5 GB and the replacement drive can be 80.3,
since all are rounded down to 80GB. This permits the smaller drive to be used.
Please note that users will lose a small amount of available storage capacity from
each drive in order to arrive at a common drive size.
FastBuild Array Utility 2.xx (c) 2002-2005 Promise Technology, Inc.
[ Define Array Definition Menu ]
Array No
RAID Level
Total Drv
Status
Array 1
RAID 5
3
Functional
Stripe Block: 64 KB
Initialize Array: ON
Gigabyte Boundary: ON
[ Drive Assignments ]
Channel ID
Drive Model
Capacity (MB)
Assignment
1:
SEAGATEST380023AS
80630
Array 1
2:
SEAGATEST380023AS
80630
Array 1
3:
SEAGATEST380023AS
80630
Array 1
4:
SEAGATEST380023AS
80630
Free
[ Keys Available ]
[ ] Up [ ] Down
[Space] Change Option
[ESC] Exit
[Ctrl-Y] Save