Adaptec AHA-2930 Installation Guide - Page 11

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. s Support Removable Disks Under BIOS as Fixed Disks - This option controls which removablemedia drives are supported by the host adapter BIOS. The default setting is Boot Only. The following choices are available: - Boot Only - Only the removable-media drive designated as the boot device is treated as a hard disk drive. - All Disks - All removable-media drives supported by the BIOS are treated as hard disk drives. - Disabled - No removable-media drives are treated as hard disk drives. In this situation, software drivers are needed because the drives are not controlled by the BIOS. 10 Caution: If a removable-media SCSI device is controlled by the host adapter BIOS, wait until the drive is powered OFF to remove the media; otherwise you may lose data! If you need to be able to remove the media while the drive is on, install a removable-media device driver and set this option to Disabled. s Extended BIOS Translation for DOS Drives > 1 GByte - This option determines whether extended translation is available for SCSI hard disks with capacities greater than 1 GByte. The default setting is Enabled. Extended BIOS Translation for DOS Drives> 1 GByte is used only with MS-DOS 5.0 or above. You do not need to enable this option if you are using another operating system such as NetWare, OS/2, Windows NT, or UNIX. Caution: If you decide to change the translation scheme, back up your disk drives first! All data is erased when you change from one translation scheme to another. The standard translation scheme for SCSI host adapters provides a maximum accessible capacity of 1 GByte. To support disk drives larger than 1 GByte, the AHA-2930B includes an extended translation scheme. This scheme, under MS-DOS, supports 2 GByte partitions on disk drives as large as 8 GBytes. When you partition a disk under BIOS control larger than 1 GByte, use the MS-DOS fdisk utility. Because the cylinder size increases to 8 MBytes under extended translation, the partition size you choose must be a multiple of 8 MBytes. If you request a size that is not a multiple of 8 MBytes, fdisk rounds up to the nearest whole multiple of 8 MBytes.