Force Computers PENT/CPCI-721, Installation Manual

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SCSI BIOS Advanced Configuration Options
PENT/CPCI-721 5 - 7
Advanced Configuration Options
The SCSI BIOS includes the following advanced configuration options.
Plug-and-Play Support
When Plug-and-Play support is enabled, the adapter automatically
assigns a SCSI ID to an attached SCSI device that supports the SCAM-1
protocol. Most non-SCAM devices tolerate SCAM protocol, so this
option can usually be enabled even in case of some non-SCAM devices.
However, in rare cases, an old SCSI-l device may not tolerate SCAM
and may cause the system to hang or operate erratically.
Support for Removable Disks
Setting the support for removable disks under BIOS as fixed disks con-
trols which removable-media drives are supported by the SCSI BIOS.
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 SCSI BIOS
are treated as hard drives.
• Disabled: No removable-media drives running under DOS are
treated as hard disk drives. In this situation, driver software is
needed, because the drives are not controlled by the SCSI BIOS.
Extended Translation Scheme for DOS Drives > 1 GByte
All current MS-DOS versions are limited to 1024 cylinders per drive.
The standard translation scheme for SCSI host adapters, using 64 heads
and 32 sectors, provides a maximum accessible capacity of 1 GByte. To
support disk drives larger than 1 GByte, the SCSI BIOS includes an
extended translation scheme that supports disk drives as large as 8
GBytes under MS-DOS. With extended translation enabled, drives han-
dled by the SCSI BIOS use extended translation if their formatted capac-
ity is greater than 1 GByte, and drives smaller than 1 GByte use
standard translation.