Advanced Configuration - Adaptec AHA-2940UW/OF User Manual

– 10.0 MB/sec for Narrow SCSI
If the single-chip host adapter is configured so it will not
initiate synchronous data transfers (Initiate Sync Negotiation is
set to No), the maximum synchronous transfer rate is the
maximum rate the single-chip host adapter accepts from the
device during negotiation.
Enable Disconnection— This option determines whether the
single-chip host adapter will allow the SCSI device to
disconnect from the SCSI bus. When Enable Disconnection is
set to Yes, the single-chip host adapter can perform other
operations on the SCSI bus while the SCSI device is
temporarily disconnected. The default setting is Yes.
Initiate Wide Negotiation— This option determines whether
the single-chip host adapter attempts 16-bit data transfers
(Wide Negotiation) instead of 8-bit data transfers. The default
setting is Yes. (The Initiate Wide Negotiation option is only
displayed if the single-chip host adapter is connected to a Wide
SCSI bus.)
When Initiate Wide Negotiation is set to Yes, the single-chip
host adapter attempts 16-bit data transfers with the device.
When the option is set to No, the single-chip host adapter
performs 8-bit data transfers unless the SCSI device itself
requests Wide Negotiation.
Note:
handling Wide Negotiation while Initiate Wide
Negotiation is set to Yes, the computer may operate
erratically or hang. If you use these devices, set Initiate
Wide Negotiation to No.

Advanced Configuration

Reset SCSI Bus at Host Adapter Initialization— This option
allows you to enable or disable SCSI bus resets generated by
the single-chip host adapter during power-on initialization
and after a hard reset. The default setting is Yes. In most cases,
Reset SCSI Bus at Host Adapter Initialization should be set to
Yes.
If you use 8-bit SCSI devices that have trouble
Using SCSISelect
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