Adaptec 2920C User Guide - Page 8

Additional Options: SCSI Device Configuration SCSI device settings allow you to configure parameters for each device on the SCSI bus. To configure a specific device, you must identify the SCSI ID assigned to that device. To determine the SCSI ID of a device, see Using the SCSI Disk Utilities on page 6. s Initiate Sync Negotiation - This option determines whether or not synchronous data transfer negotiation between the host adapter and a device is initiated by the host adapter. The default setting is Yes (Enabled). Set Initiate Sync Negotiation to No for devices that do not support Sync Negotiation. s Maximum Sync Transfer Rate - This option sets the maximum synchronous data transfer rate that the host adapter supports. The host adapter supports transfer rates of up to 10.0 MBytes/sec. If Initiate Sync Negotiation is set to No, then the maximum synchronous transfer rate is the maximum rate that the host adapter accepts from the device during negotiation. s Enable Disconnection - This option lets a SCSI device temporarily disconnect from the SCSI bus. This allows the host adapter to perform other operations while the SCSI device is disconnected. The default setting is Yes. Set Enable Disconnection to Yes if two or more SCSI devices are connected to the host adapter. s Send Start Unit Command - This option determines whether the Start Unit SCSI Command is sent to the device at bootup (most devices do not require this). The default setting is No. s BIOS Multiple LUN Support-This option determines whether booting from a SCSI device that has multiple LUNs is supported. The default setting is No (Disabled). Enable this option if your boot device has multiple LUNs. s Include in BIOS SCAN-This option determines whether or not the AHA-2920C will be included in the BIOS device scan during power up. The default setting is Yes. s Reset SCSIBus at IC Initialization-This option determines whether or not the SCSI bus will be reset and placed into an idle state after power up. The default value is enabled. Additional Options: Boot Device Options Boot device options allow you to specify the device from which to boot your computer. s Boot SCSI ID-This option specifies the SCSI ID of the boot device and must correspond to the ID of the boot device. The default setting is SCSI ID 0. s Boot LUN Number-This option allows you to specify which LUN to boot from on your boot device if the device has multiple LUNs (Logical Unit Numbers) and Multiple LUN Support is enabled. The default setting is LUN 0. Additional Options: Advanced Configuration Options Do not change the advanced configuration options unless absolutely necessary. s Plug and Play SCAM Support - This option allows the host adapter to automatically assign SCSI IDs to SCSI devices that support the SCAM protocol. The default setting is Disabled. Most non-SCAM devices tolerate the SCAM protocol, so you can enable this option even if you have a non-SCAM device. s Host Adapter BIOS - This option enables or disables the host adapter BIOS. The default setting is Enabled. Several SCSISelect options are not valid unless the host adapter BIOS is enabled. Make sure that the BIOS is enabled if you want to boot from a SCSI disk drive connected to the host adapter. Disable the BIOS if device drivers control the devices on the SCSI bus and do not require BIOS functionality. 8