Re: Sharing HDs with Ramfast, HS SCSI, Mac?

[dempson@actrix.gen.nz (David Empson)]

In article <1994Mar28.102135.24665@mnemosyne.cs.du.edu>,
Chris Deschu <cdeschu@nyx10.cs.du.edu> wrote:
> 
> Hi,
> 	I've got a problem. I have a //gs with a RamFAST (latest ROM),
> and a Mac Plus. I have friends with //gs' with Apple High Speed SCSI
> cards. I've been sharing hard drives between the mac plus, and the
> //gs with the RamFAST card for a long time with no problems. However,
> I can't mount my hard drives on machines that have HS SCSI cards in
> them instead of ramfast. I have no problems hooking my drive up to other
> ramfast cards. This problem has been duplicated with several drives,
> and several of each type of scsi card. All drives partitioned by either
> a mac, or a ramfast will not work on a HS SCSI, and all drives that
> were partitioned on the HS SCSI have problems on the //gs, and won't
> work on the mac.

Well, I don't know what your problem is, because I have successfully
used drives partitioned on the Mac with the IIgs, at least on the HS
SCSI card, and possibly on the original Apple SCSI card as well.  I've
never used a RamFAST, though.

I've done this with several SyQuest SQ-44 cartridges, and with a
Rodime 60 MB drive.

I partitioned my Quantum 240MB drive on the IIgs (with my HS SCSI
card and Advanced Disk Utilities), and wrote a Macintosh driver to it,
but I haven't tried using it on a Mac yet.

> 	If anyone out there has the technical specs for any of
> these three, namely, the exact name and type both created and
> expected for partition map entries by each of these items?

Using Chinook SCSI Utilities, I can determine the following:

The ones I can see on my Quantum drive:

Apple_partition_map, status = $37
Apple_Driver, status = $7F for the used one, $37 for the rest.
Apple_PRODOS, status = $3F

[C.S.U. doesn't actually display the partition type for ProDOS
partitions - it displays the volume name, so I can't confirm the
partition type without doing a low-level dump.  I can't see my HFS
partition or any leftover free space, because C.S.U. only displays the
first nine partitions.]