Dell PowerEdge 2300 User Manual page 42

3-6 Dell PowerEdge 2300 Systems User's Guide
operations on the SCSI bus while the SCSI device is temporarily disconnected.
The default setting is Yes.
Leave Enable Disconnection set to Yes if two or more SCSI devices are con-
nected to the host adapter. This optimizes SCSI bus performance. If only one
SCSI device is connected to the host adapter, set Enable Disconnection to No to
achieve slightly better performance.
Initiate Wide Negotiation — This option determines whether the host adapter
attempts 16-bit data transfer instead of 8-bit data transfer. The default setting is
Yes.
NOTE: Some 8-bit SCSI devices may have trouble handling wide negotiation,
which may result in erratic behavior or a hang condition. For these devices, set
Initiate Wide Negotiation to No.
When this option is set to Yes, the host adapter attempts 16-bit transfer. When
this option is set to No, 8-bit data transfer is used unless the SCSI device itself
requests wide negotiation. The effective transfer rate is doubled when 16-bit data
transfer is used because the data path for wide SCSI is twice the size of normal
8-bit SCSI.
Send Start Unit Command — This option determines whether the start unit
command is sent to the SCSI device during the boot routine. The default setting
is Yes.
Setting this option to Yes reduces the load on your computer's power supply by
allowing the host adapter to start SCSI devices one at a time when you boot your
computer. When this option is set to No, the devices are allowed to start at the
same time. Most devices require you to set a jumper before they can respond to
this command.
NOTE: For many devices, if Send Start Unit Command is set to Yes, the boot rou-
tine time will vary depending on how long it takes each drive to start.
BIOS Multiple LUN Support — This option provides support for peripherals that
contain multiple SCSI devices, such as autoloading tape drives and CD-ROM
changers.
Include in BIOS Scan — This option enables you to set whether the system BIOS
scans this device during system startup. The default setting is Yes.
The advanced host adapter settings should not be changed unless absolutely neces-
sary. These values are set by Dell, and changing them may cause conflicts with the
SCSI devices.
Host Adapter BIOS — This option enables or disables the host adapter BIOS. The
default setting is Enabled.
NOTE: Several SCSI Select options are not valid unless the host adapter BIOS is
enabled.