User`s guide

C-2

AHA-3940U/3940UW/3940UWD User’s Guide

Stock Number: 511041-00, Rev. B Page: C-2

Print Spec Number: 494569-00

Current Date: 2/14/97 ECN Date: 2/17/97

Caution:

Be sure to back up your disk drive before you

change the translation method on a disk drive. All data is

erased when you change from one translation scheme to

another.

When Not to Use Extended Translation

■

NetWare and the newer versions of UNIX do not share the

1024 cylinder limit of DOS and do not require extended trans-

lation to support large disk drives.

■

Drives are sometimes formatted with two or more partitions

for different operating systems. Use standard translation when

the sum of the DOS partitions is less than 1 GByte. Partitions

for UNIX and NetWare can be larger than 1 GByte when using

standard translation.

Note:

UNIX is understood to be SCO v3.2.4 (or later), SCO

UnixWare all versions, and SCO Open Server.

Installing or Repartitioning Disks

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 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.

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