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3-6 Dell PowerEdge 4350 Systems Users Guide
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Boot Device Options allows you to specify the device from which to boot your
system:
Boot Target ID This option specifies the SCSI ID of the device from which you
boot your system. SCSI IDs are set for the hard-disk drive according to the drives
location on the backplane board for the SCSI ID of each drive location. The default
for Boot Target ID is 0.
Boot LUN Number If your boot device has multiple logical unit numbers
(LUNs) and BIOS Multiple LUN Support is Yes (the default is No), see
Advanced Host Adapter Settings found later in this section. This option allows
you to specify a particular LUN from which to boot on your boot device. The
default is 0.
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SCSI Device/Configuration Settings allows 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 SCSI Disk
Utilities found earlier 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 is Yes.
Synch negotiation is a SCSI feature that allows the host adapter and its attached
SCSI devices to transfer data in synchronous mode. Synchronous data transfer is
faster than asynchronous data transfer.
The host adapter always responds to sync negotiation if the SCSI device initiates
it. If neither the host adapter nor the SCSI device initiates sync negotiation, data
is transferred asynchronously.
Normally, you should leave Initiate Sync Negotiation enabled (a setting of Yes),
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 Negotiation
is set to
Yes
. Set
Initiate Sync Negotiation
to
No
for these devices.
Maximum Sync Transfer Rate (MB/sec) This option sets the maximum syn-
chronous data transfer rate that the host adapter supports. The host adapter
supports rates up to 80 megabytes per second (MB/sec). The default for the
Adaptec AIC-7860 host adapter is 20; the default for the AIC-7890 and 2940U2W
host adapters is 80.
If the host adapter is set so that it does not negotiate for synchronous data trans-
fer, the maximum synchronous transfer rate is the maximum rate that the host
adapter accepts from the device during negotiation. (This is standard SCSI
protocol.)
3502Ebk0.book Page 6 Friday, November 13, 1998 10:00 AM