User`s guide

Appendix C: Using the Adaptec RAID Controller Utility ● 99
For the best device performance, don’t change the default settings.
Note: Default settings are shown in bold type.
Formatting and Verifying Disk Drives
You can use the disk utilities to low-level format or verify your disk
drives. (New disk drives are low-level formatted at the factory and do
not need to be low-level formatted again.)
Caution: Before you format a disk drive, back up all data.
Formatting destroys all data on a disk drive.
To format or verify a disk drive:
1 Start the Adaptec RAID Controller utility (see page 91).
2 Select the controller you want, press Enter.
3 Select Disk Utilities.
4 Select the disk drive you want, then press Enter.
5 Select Format Disk or Verify Disk Media.
Option Description
Maximum
Transfer Rate
Shows the maximum data transfer rate that the SCSI
channel supports.
Enable
Disconnection
When enabled, the SCSI device can disconnect from the
SCSI channel. Default is Ye s (enabled).
Initiate Wide
Negotiation
When enabled, the SCSI channel attempts 16-bit data
transfer instead of 8-bit data transfer. Default is Yes
(enabled).
QAS When enabled, QAS (Quick Arbitration and Selection) is
used to eliminate overhead and speed up data transfers on
the SCSI bus. Default is No (disabled).
Note—Adaptec recommends that you do not enable QAS
if you are using an enclosure that supports Ultra320
expanders.
Packetized When enabled, SCSI packetization (encapsulation) is used
to reduce overhead and speed data transfer. Default is Yes
(enabled).
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