Adaptec AHA-2742T User Manual - Page 103

When to Use Extended Translation

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AHA-2740 Series User's Manual When to Use Extended Translation With DOS Version 5 Only NetWare 386 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 Do not use extended translation on drives formatted with two or more partitions for different operating systems. Use standard translation. The sum of the DOS partitions will be 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 AT&T®/USL™ all versions, SCO® v3.2.4 (or later) and ISC v3.0 (or later). Using Fdisk To install a new disk, or to re-partition 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 partition 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 will round up to the nearest whole multiple of 8 MBytes. D-4 Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. C (Page D-4) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93

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When to Use Extended Translation
With DOS Version 5 Only
NetWare 386 and the newer versions of UNIX do not share the
1024 cylinder limit of DOS and do not require extended transla-
tion to support large disk drives.
Drives With Mixed Partitions
Do not use extended translation on drives formatted with two or
more partitions for different operating systems. Use standard trans-
lation. The sum of the DOS partitions will be 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 AT&T
®
/USL
all versions, SCO
®
v3.2.4
(or later) and ISC v3.0 (or later).
Using Fdisk
To install a new disk, or to re-partition 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 parti-
tion 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
will
round up to the nearest whole multiple of 8 MBytes.
Adaptec AHA-2740 Series User’s Manual
Stock Number:
510381-00
/
Rev. C
(Page D-4)
Print Spec Number:
491709-00 Rev C
Current Date:
9/1/93
ECN Date:
9/14/93
AHA-2740 Series User’s Manual
D-4