IBM OPTIONS, Руководство пользователя

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– Boot Only: Only the removable-media drive designated as the startup
device is treated as a hard disk.
– All Disks: All removable-media drives supported by the BIOS are treated
as hard disks.
– Disabled: No removable-media drives are treated as hard disk drives. In
this situation, device drivers are needed because the drives are not
controlled by the BIOS.
Attention: If the SCSI adapter BIOS controls a removable-media SCSI
device, do not remove the media while the drive is on or you might lose
data. If you want to be able to remove media while the device is on, install
your removable-media device driver and set this option to Disabled.
v
Extended BIOS translation for DOS drives > 1 GB - This option determines
whether extended the translation scheme is available for SCSI hard disks
with capacities greater than 1 GB. The standard translation scheme for SCSI
adapters provides a maximum accessible capability of 1 GB. The initial
setting is Enabled.
– This option is valid only if the SCSI adapter BIOS is set to Enabled.
– Do not select Enable for this option with NetWare, OS/2, Windows NT,
or UNIX. This option is only used with DOS 5.0 or later.
Attention: 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.
– When set to Enabled, the adapter supports disk drives up to 8 GB under
DOS with a maximum partition size of 2 GB.
– When you partition a disk larger than 1 GB, use the DOS FDISK utility
program 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 number that is a multiple of 8 MB.
v
Display <Ctrl-A> message during BIOS initialization - This option
determines whether the
Press <Ctrl> <A> for SCSISelect (TM) Utility!
message is displayed on your screen during system start up. The initial
setting is Enabled. This option is valid only if the SCSI adapter BIOS is
Enabled
. If this setting is set to Disabled, you can still invoke the SCSISelect
by pressing Ctrl+A after the SCSI adapter BIOS banner appears.
v
Multiple logical unit (LUN) support - This option determines whether
starting up from a SCSI device that has multiple LUNs is supported. The
initial setting is Disabled. Select Enable for this option if your startup
device has multiple LUNs. This option is valid only if the SCSI adapter BIOS
is set to Enabled.
v
BIOS support for more than two drives - This option determines whether
the SCSI adapter BIOS provides support for two to eight hard disk drives.
This feature is supported by DOS 5.0 and later. The initial setting is Enabled.
Appendix B. Using SCSISelect
B-5