SCSI Device Settings
The SCSI device settings allow you to configure certain
parameters for each device on the SCSI bus. To configure
a specific device, you must know the SCSI ID assigned to
that device. If you are not sure of the SCSI ID, see
“Using the SCSI Disk Utilities” found later in this
section.
•
Initiate Sync Negotiation. This option determines
whether the host adapter initiates synchronous data
transfer negotiation (sync negotiation) between itself
and the device. The default setting is Yes.
The host adapter always responds to sync negotia-
tion if the SCSI device initiates it. If neither the host
adapter nor the SCSI device initiates sync negotia-
tion, data is transferred asynchronously.
Normally, you should leave the Initiate Sync Negoti-
ation setting enabled, because most SCSI devices
support sync negotiation and because it allows for
faster data transfer.
NOTE: Some older SCSI-1 devices do not support
sync negotiation. This may cause your computer to
operate erratically or hang if Initiate Sync Negotia-
tion is set to Yes. Set Initiate Sync Negotiation to No
for these devices.
•
Maximum Sync Transfer Rate. This option sets the
maximum synchronous data transfer rate that the
host adapter supports. The host adapter supports
rates up to the maximum of 40 megabytes per second
(MB/sec). The default setting is 40 MB/sec (the
maximum).
If the host adapter is set to not negotiate for synchro-
nous data transfer, the maximum synchronous
transfer rate is the maximum rate that the host
adapter accepts from the device during negotiation.
(This is standard SCSI protocol.)
•
Enable Disconnection. This option (sometimes
called disconnect/reconnect) determines whether the
host adapter allows the SCSI device to disconnect
from the SCSI bus. Enabling disconnection allows
the host adapter to perform other operations on the
SCSI bus while the SCSI device is temporarily dis-
connected. The default setting is Yes.
Leave Enable Disconnection set to Yes if two or
more SCSI devices are connected to the host adapter.
This optimizes SCSI bus performance. If only one