16 May
2023
16 May
'23
6:57 p.m.
>> The biggest drive I remember seeing on OS/9
was 20MB or 40MB. I
>> don't remember the File Allocation Table size or format.
> Well, that would be "spot on", as the formatted capacity of an ST-251 was
> 40 Megabytes.
When used with
MS-DOS, prior to
MS-DOS 3.31, it would be partitioned as
> two 20MB, or as a 32MB plus an 8MB.
> (V3.31 was the first version of MS-DOS to support a partition larger than
> 32MB) That's how I used it on my DEC Rainbow under
MS-DOS 2.11 and later 3.10b.
And recently under venix...
OEM versions of MS-DOS, particularly 2.11 and 3.31 often had changes made
by the OEM. Many minor ones, but also some major ones.
I should have worded that, "V3.31 was the first version of MS-DOS to
support a partition larger than 32MB, WITHOUT vendor/OEM modifications"
Disk formats other than the primary ones were often added by OEMs, such as
80 track, and 3.5" prior to 3.20. There were numerous implementations of
3.5" drives starting with V2.11, many of which were not directly
compatible with the mainstream ones that started with V3.20.
--
Grumpy Ol' Fred cisin(a)xenosoft.com