When To Use Extended Translation; Drives With Mixed Partitions; Using Fdisk; Extended Translation Questions And Answers - Adaptec AHA-3940 User Manual

AHA-3940/3940W User's Guide

When to Use Extended Translation

NetWare 386 (versions 3.0 and above) and the newer versions of
UNIX do not share the 1024 cylinder limit of DOS and do not require
extended translation to support large disk drives.

Drives With Mixed Partitions

Use standard translation, not extended translation, on drives for-
matted with two or more partitions for different operating systems.
Partitions for UNIX and NetWare can be larger than 1 GByte when
using standard translation.
Note:
The term UNIX, as used here, includes all versions of
AT&T/USL UNIX, SCO v3.2.4 (or later), and ISC v3.0 (or later).

Using Fdisk

To install a new disk, or to repartition an existing disk, use the fdisk
DOS utility as you normally would. The cylinder size increases to
8 MBytes when you enable extended translation. The size of the par-
tition you request must therefore be a multiple of 8 MBytes. If you
request a partition size that is not a multiple of 8 MBytes, fdisk
rounds up to the nearest whole multiple of 8 MBytes.

Extended Translation Questions and Answers

What happens if I enable extended translation with SCSI drives smaller than 1 GByte?
Drives handled by the BIOS use extended translation if their format-
ted capacity is greater than 1 GByte. Drives smaller than 1 GByte of
formatted capacity use standard translation regardless of whether
extended translation is enabled.
What if more than two hard disk drives are connected to the host adapter channel?
Under MS-DOS 5.0 or above, each AHA-3940/3940W host adapter
can support up to eight drives without additional software. To do
this you must enable BIOS Support for More Than 2 Drives in
SCSISelect. (This option is Disabled by default.)
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Current Date: 8/24/94

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