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Re: Using 3.5" IDE drive with AIIe
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In article <8vlh7i$duo$1@merope.saaf.se>, Paul Schlyter <pausch@saaf.se> wrote:
>In article <975007562.807345@chakotay.ncc74656.org>,
>Scott Alfter <salfter@salfter.ncc74656.dyndns.org> wrote:
>> What's the problem here? ProDOS supports partition sizes up to 32 megs.
>> Split your 110-meg hard drive four ways and you're done.
>The problem is that ProDOS most certainly don't have built-in support
>for homemade IDE cards
True...I assumed that the original poster planned to use an off-the-shelf
IDE card, like one of SHH's cards (TurboIDE?) or the controller for an AE
Vulcan.
>Also, "partitioning" can be done in many ways -- it's merely a
>software convention of splitting up the HD into several logical
>areas. Does ProDOS support the PC conventions for partitioning
>harddisks, or does ProDOS use its own conventions?
I believe that, at least up to a point, it leaves partitioning to the
controller card. The RamFAST and Apple cards use the same type of partition
table as the Macintosh, but that's SCSI. CMS used hard partitioning that
was set by jumpers; this scheme was limited to drives of 64 megs or less.
As for what Apple II IDE controllers support, that's anybody's guess.
(Could be Mac-style, could be x86-style, could be something completely
different.)
>When the 5 MByte Corvus harddisks first appeared, it was usually
>partitioned into zillions of Apple DOS partitions, each 140 KBytes large,
>to mimic an Apple II DOS floppy -- that partitioning was certianly obtained
>in a way incompatible with the partitioning of most IDE harddisks today.
I can't say I've ever seen one of those, but I saw a hard drive hooked into
a CoCo about 16 or 17 years ago that divvied up the drive into a bunch of
tiny, floppy-sized partitions.
_/_
/ v \
(IIGS( Scott Alfter (remove Voyager's hull number for email address)
\_^_/ http://salfter.dyndns.org
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