Scsi-Specific Controller Settings - Adaptec SAS/SATA/SCSI RAID Controllers Installation And User Manual

SCSI-specific Controller Settings

In addition to the general settings listed on
specific settings that can be modified if required.
To modify SCSI-specific settings, select SCSI Configuration from the SCSISelect main menu.
SCSI Device Settings
You can use SCSISelect to modify some of the settings on the SCSI devices connected to your
SCSI controller.
To modify SCSI device settings, select SCSI Configuration from the SCSISelect main menu,
then select Additional Options. Devices are listed by SCSI ID. (To find the SCSI ID for a
specific device, see Formatting and Verifying Disk Drives on page
For the best device performance, don't change the default settings.
Note:
Default settings are shown in bold type.
Option Description
Maximum Shows the maximum data transfer rate that the SCSI channel supports.
Transfer Rate
Enable When enabled, the SCSI device can disconnect from the SCSI channel. Default is
Disconnection Yes (enabled).
Initiate Wide When enabled, the SCSI channel attempts 16-bit data transfer instead of 8-bit
Negotiation 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).
SCSI Channel Interface Settings
Note:
Default settings are shown in bold type.
Option Description
Controller SCSI Sets the controller's SCSI ID. Adaptec recommends that you leave the controller
Channel ID set to the default (7), which gives it the highest priority on the SCSI channel.
SCSI Parity When enabled, the controller verifies the accuracy of data transfer on the SCSI
Checking channel. Disable only if the controller is connected to any SCSI device that does
not support SCSI parity. Default is enabled.
Controller SCSI Sets termination on the controller. Adaptec recommends that you retain the
Channel default setting (auto mode).
Termination
Appendix C: Using the Adaptec RAID Configuration Utility
page 82, your Adaptec SCSI controller has SCSI-
84
85.)