Adaptec 2940UW PRO, Руководство пользователя, Страница: 27 / 38

17
Configuring the SCSI Card 2940UW Pro with SCSISelect
SCSI Device Configuration Options
Note:
To configure settings for a SCSI device, you must
know its SCSI ID (see Using SCSI Disk Utilities on page 20).
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Sync Transfer Rate (MBytes/sec) —Determines the maximum
synchronous data transfer rate the SCSI card supports. Use the
maximum value of 40.0. If your SCSI device is not Ultra SCSI,
select a transfer rate of 10.0.
■
Initiate Wide Negotiation —When set to Yes , the SCSI card
attempts 16-bit data transfer (wide negotiation). When set to
No , the SCSI card uses 8-bit data transfer unless the SCSI
device requests wide negotiation.
Note:
Set Initiate Wide Negotiation to No if you are
using an 8-bit SCSI device that hangs or exhibits other
performance problems with 16-bit data transfer.
■
Enable Disconnection —When set to Yes , allows the SCSI
device to disconnect from the SCSI bus. Leave the setting at
Yes if two or more SCSI devices are connected to the SCSI card.
If only one SCSI device is connected, changing the setting to
No results in slightly better performance.
■
Send Start Unit Command —When set to Yes , sends the Start
Unit Command to the SCSI device at bootup.
■
Enable Write Back Cache —When set to Yes , the disk write
cache on the selected device will be enabled. When set to No ,
the disk write cache will be disabled. When set to N/C , no
change will be made to the disk write cache; the SCSI card
recognizes the disk’s default setting and does not change it.
Enabling SCSI write cache will improve the overall
performance. The default setting is
N/C , but you can enable it
if the SCSI device supports the feature.
■
BIOS Multiple LUN Support —When set to Yes , the SCSI card
BIOS provides boot support for a SCSI device with multiple
LUNs. Leave this setting set to
No if your boot device does not
have multiple LUNs.
■
Include in BIOS Scan —When set to Yes , the SCSI card BIOS
includes the SCSI device as part of its BIOS scan at bootup.