Adaptec 131U2 Hardware Guide - Page 68

Additional Options

Page 68 highlights

AAA-130U2 Series Installation and Hardware Guide s Enable Disconnection-When set to Yes, allows the SCSI device to disconnect from the SCSI bus (sometimes called Disconnect/Reconnect). Leave the setting at Yes if two or more SCSI devices are connected to the AAA-131U2/133U2. If only one SCSI device is connected, changing the setting to No results in slightly better performance. s Initiate Wide Negotiation-When set to Yes, the AAA-131U2/ 133U2 attempts 16-bit data transfer (wide negotiation). When set to No, the AAA-131U2/133U2 uses 8-bit data transfer unless the SCSI device requests wide negotiation. For Ultra2 SCSI devices, make sure this option is set to Yes. Note: Set Initiate Wide Negotiation to No if you have an 8-bit SCSI device that hangs or exhibits other performance problems. s Send Start Unit Command-When set to Yes, sends the Start Unit Command to the SCSI device at bootup. s Include in BIOS Scan-When set to Yes, the AAA-131U2/ 133U2 BIOS includes the device as part of its BIOS scan at bootup. Leave this setting at Yes for all hard disks that are part of an array. Additional Options s Array1000U2 BIOS-When set to Enabled, the AAA-131U2/ 133U2 BIOS is installed and all Int13 (except bootable CD-ROM) devices are supported at boot time. When set to Disabled, the AAA-131U2/133U2 BIOS is not installed. s BIOS Support for Bootable CD-ROM-When set to Enabled, the AAA-131U2/133U2 BIOS allows booting from a CD-ROM drive. Ì A-6

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A-6
AAA-130U2 Series Installation and Hardware Guide
Enable Disconnection
—When set to Yes, allows the SCSI
device to disconnect from the SCSI bus (sometimes called
Disconnect/Reconnect). Leave the setting at Yes if two or more
SCSI devices are connected to the AAA-131U2/133U2. If only
one SCSI device is connected, changing the setting to No
results in slightly better performance.
Initiate Wide Negotiation
—When set to Yes, the AAA-131U2/
133U2 attempts 16-bit data transfer (wide negotiation). When
set to No, the AAA-131U2/133U2 uses 8-bit data transfer
unless the SCSI device requests wide negotiation. For Ultra2
SCSI devices, make sure this option is set to Yes.
Note:
Set Initiate Wide Negotiation to
No
if you have
an 8-bit SCSI device that hangs or exhibits other
performance problems.
Send Start Unit Command
—When set to Yes, sends the Start
Unit Command to the SCSI device at bootup.
Include in BIOS Scan
—When set to Yes, the AAA-131U2/
133U2 BIOS includes the device as part of its BIOS scan at
bootup. Leave this setting at Yes for all hard disks that are part
of an array.
Additional Options
Array1000U2 BIOS
—When set to Enabled, the AAA-131U2/
133U2 BIOS is installed and all Int13 (except bootable
CD-ROM) devices are supported at boot time. When set to
Disabled, the AAA-131U2/133U2 BIOS is not installed.
BIOS Support for Bootable CD-ROM
—When set to Enabled,
the AAA-131U2/133U2 BIOS allows booting from a CD-ROM
drive.