Promise Technology FASTtrak100 TX User Manual page 26

Selecting Array Type
1. Under the Definition section of this menu, highlight the Array # for which you
want to assign a RAID level.
2. Use the [Space] key to cycle through three array types: Performance (RAID 0
Striping), Security (RAID 1 Mirroring, RAID 0+1 Striping/Mirroring (for 4 drives),
or Capacity (Spanning)). See page 70 about RAID levels.
FastBuild (tm) Utility 1.xx (c) 1995-2001 Promise Technology, Inc.
Array No RAID Mode
Array 1 Stripe
Stripe Block: 64 KB
Channel:ID
1 : Master
1 : Slave
2 : Master
[ ] Up [ ] Down [ESC] Exit [Space] Select [Ctrl-Y] Save
Selecting Stripe Block
For RAID 0 and RAID 0+1 arrays you may manually select the "stripe block size." Use
the Spacebar to scroll through choices progressing as follows (1, 2, 4, 8, 16 . . .
1024).
The size selected affects how FastTrak100 sends and retrieves data blocks from the
drives. You will need to perform your own testing to determine how the data block
size is affecting your particular use of the array. In general, a larger block size is
better when handling large data transfers (such as in A/V editing or graphics) while a
smaller block size is better when handling e-mail and other common server data. The
default is 64K.
Gigabyte Boundary
The Gigabyte Boundary feature is designed for mirrored arrays (RAID 1 or
RAID 0+1) 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, a 20.5 GB drive would be rounded down to 20
GB). This can be helpful in the event that a drive fails and an exact replacement model
FastTrak100 TX/LP™ Series User Manual
[ Define Array Definition Menu ]
Total Drv
2
[ Drive Assignments ]
Drive Model
QUANTUMCR8.4A
QUANTUMCR8.4A
QUANTUMCR8.4A
[ Keys Available ]
Capacity(MB)
16126
Gigabyte Boundary: ON
Capacity (MB)
8063
8063
8063
22
Status
Functional
Assignment
Y
N
Y