Installing and Configuring SCSI Drivers 3-5
• EXTENDED BIOS TRANSLATION FOR DOS
DRIVES > 1GB. This option determines whether
extended translation is available for SCSI hard-disk
drives with capacities greater than 1 gigabyte (GB).
The default setting is ENABLED.
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 8GB under the MS-DOS operating system
with a maximum partition size of 2 GB.
Extended BIOS translation is used only with
MS-DOS 5.0 or later. It is not necessary to enable
this if you are using another operating system such
as Novell NetWare.
When you partition a hard-disk drive larger than
1GB, use the MS-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.
• DISPLAY <CTRL><A> MESSAGE DURING BIOS INI-
TIALIZATION. This option determines whether the
Press <CTRL><A> for SCSISelect (TM)
Utility! message appears on your screen during
system bootup. 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.
• MULTIPLE LUN SUPPORT. This option determines
whether your system supports booting from a SCSI
device that has multiple LUNs. The default setting is
DISABLED. Enable this option if your boot device has
multiple LUNs.
• BIOS SUPPORT FOR BOOTABLE CD-ROM. This option
determines whether the host adapter BIOS provides
support for booting from a CD-ROM drive. The
default setting is ENABLED.
• BIOS SUPPORT FOR INT 13 EXTENSIONS. This option
determines whether the host adapter BIOS supports
disks with more than 1024 cylinders. The default set-
ting is ENABLED.
• SUPPORT FOR ULTRA SCSI SPEED. This option
determines whether the host adapter supports the fast
transfer rates (20.0 to 40.0 megabits per second
[Mbps]). The default setting is ENABLED.
Starting the SCSISelect Utility
You can start the SCSISelect utility by pressing
<CTRL><A> when the following prompt appears briefly
at boot time:
Press <CTRL><A> for SCSISelect (TM)
Utility!
The first menu displays the CONFIGURE/VIEW HOST
ADAPTER SETTINGS and SCSI DISK UTILITIES options.
Using SCSISelect Menus
SCSISelect uses menus to list options you can select. To
select an option, use the up- and down-arrow keys to
move the cursor to the option; then press <ENTER>.
In some cases, selecting an option displays another menu.
You can return to the previous menu at any time by press-
ing <ESC>. To restore the original SCSISelect default
values, press <F6>.
Using the SCSI Disk Utilities
To access the SCSI disk utilities, select the SCSI DISK
UTILITIES option from the menu that appears when you
start SCSISelect. Once the option is selected, SCSISelect
immediately scans the SCSI bus (to determine the
devices installed) and displays a list of all SCSI IDs and
the devices assigned to each ID.
CAUTION: 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.
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