Dell PowerEdge 6400 - Manual (Page 61)

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BIOS Multiple LUN Support — Provides support for peripherals that contain multiple SCSI devices, such as autoloading tape drives and
CD-ROM changers.
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Include in BIOS Scan — Enables you to set whether the system BIOS scans this device during system start-up. The default is Yes.
Advanced Host Adapter Settings
The advanced host adapter settings should not be changed unless absolutely necessary. These values are set by Dell, and changing them may
cause conflicts with the SCSI devices.
l Reset SCSI Bus at IC Initialization — Enables the SCSI bus to be reset when the controller is initialized. The default is Enabled.
l Display <Ctrl><a> Message During BIOS Initialization — Determines whether the Press <CTRL><A> for SCSISelect (TM)
Utility! message appears on your screen during system start-up. The default setting is Enabled. If this setting is disabled, you can still
run the SCSISelect utility by pressing <Ctrl><a> after the host adapter BIOS banner appears.
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Support Removable Disks Under BIOS As Fixed Disks — Controls which removable-media drives are supported by the host adapter
BIOS. The default for the AIC-7880 host adapter is Boot Only. The default for the AIC-7899 host adapter is Disabled. The following choices
are available.
NOTICE: If a removable-media SCSI device is controlled by the host adapter BIOS, do not remove the media while the drive is on or
you may lose data. If you want to be able to remove media while the drive is on, install your removable-media device driver and set
this option to Disabled.
l Boot Only — Only the removable-media drive designated as the boot device is treated as a hard-disk drive.
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All Disks — All removable-media drives supported by the BIOS are treated as hard-disk drives.
l 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.
l Extended BIOS Translation For DOS Drives > 1 GB — Determines whether extended translation is available for SCSI hard-disk drives
with capacities greater than 1 gigabyte (GB). The default is Enabled.
NOTICE: Back up your hard-disk drive before you change the translation scheme. 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 GB. To support hard-disk
drives larger than 1 GB, the 78xx series host adapters include an extended translation scheme that supports hard-disk drives as large
as 8 GB, with a maximum partition size of 2 GB under the DOS operating system.
It is not necessary to enable the Extended BIOS Translation setting if you are using another operating system, such as Novell
NetWare.
When you partition a hard-disk drive larger than 1 GB, use the DOS fdisk utility as you normally would. Because the cylinder size
increases to 8 MB under extended translation, the partition size you choose must be a multiple of 8 MB. If you request a size that is not
a multiple of 8 MB, fdisk rounds up to the nearest whole multiple of 8 MB.
l Verbose/Silent Mode — Displays the host adapter information during system start-up. The default is Enabled.
l Host Adapter BIOS — Enables or disables the host adapter BIOS. The default is Enabled.
If you are booting from a SCSI hard-disk drive connected to the host adapter, the BIOS must be enabled. You should disable the host
adapter BIOS if the system never boots to any devices connected to the host adapter.
l Domain Validation — Instructs the host adapter not to accept a negotiated speed until a validation test is successfully performed. After
determining the speed that a target device is capable of, the host adapter sends a Write Buffer command to the target device. The data
transfer occurs at the full speed initially. The initiator reads and tests the data, and identifies any parity or cyclic redundancy check (CRC)
errors. If the test fails, the initiator lowers its speed and repeats the test. In this manner, a compatible speed will be found and locked in
before user data transfers begin. The default is Enabled.
l BIOS Support For Bootable CD-ROM — Determines whether the host adapter BIOS provides support for booting from a CD-ROM drive.
The default is Enabled.
l BIOS Support For Int13 Extensions — Determines whether the host adapter BIOS supports disks with more than 1024 cylinders. The
default is Enabled.
Starting the SCSISelect Utility
NOTE: The setting for BIOS Multiple LUN Support must be Enabled if a tape autoloader is connected.
NOTE: Several SCSISelect options are not valid unless the host adapter BIOS is enabled.