Re: SCSI hard-drive partition questions

["John King" <joki@eskimo.com>]

On ebay I bought some old SyQuest drives ($10-15 each) and disks ($5ish
each). Attach one to Mac one to IIgs.

I can exchange disks and data between them -- I think both ProDos and HFS.

For a while, until I hooked up a scanner (something is wrong I know), I
could even take a disk PC_formatted_SyQuest and directly copy PC to Prodos
in the Mac (old Classic II).


"Dennis Jenkins" <dennis@usb.com> wrote in message
3A8AC412.353AE7AB@usb.com">news:3A8AC412.353AE7AB@usb.com...
> Hello all,
> I'm having difficulty getting my hard-drive on my IIgs to be recognized
> when I remove it from the IIgs and attach it to my Mac LC-II.  For
> anyone to help me, I should start at the beginning:
>
> 0) I won an ebay auction for an Apple SCSI card.
> 1) I took a 40M Original Apple HD out of a spare mac and placed it in a
> SCSI enclosure.
> 2) I used Mac software (Apple HD SC Setup) to partition the drive:  32M
> prodos and 8M HFS.
>   The Mac recognized everything just fine.  I was able to copy lots of
> files into my ProDOS
>   partition using the Mac's Finder.
> 3) My SCSI card arrived, I plugged it into my IIgs.
> 4) I attached the 40M HD to my IIgs.
> 5) The computer failed to boot from the HD, so I booted prodos from a
> 800K floppy.
> 6) ProDOS did not recognize the partitions.  Ug.
> 7) I used 'filer' for format the drive.
> 8) I copied my files back to the drive, one at a time, using 'filer'.
> (that sucks)
> 9) I can boot from my HD.  Yippie!
> 10) 2 weeks later I decide that filer sucks, and since GS/OS doesn't
> like my SCSI rom,
>   I can't run GS/OS's finder.  So I attach the drive to my Mac.
> 11) The mac won't recognize it.
>
> I suspect that 'filer' formatted the first 32M of the device as a raw
> prodos device.  Ie,
> no partition table, no SCSI v4.3 driver partition, just 65534 blocks of
> prodos followed
> by 16386 blocks of junk.  (yes, I'm 2 blocks short of a full 32M.  I
> have no idea why filer did that.)
>
> I have never run the official apple II SCSI utilities on the device
> (but I did download them.  I will play with them soon).
>
> I want to be able to attach the HD to the IIgs or the Mac LC-II and
> have both computers recognize both the ProDOS and HFS partitions.  (I
> realize that until I get my ROM upgraded, I can't run GS/OS, hence no
> IIgs access to HFS).  However, the Mac wants a partition table and the
> IIgs SCSI card (rom ver B) appears to hate partition tables (I will
> check the device later to see if it really does have a partition table).
>
> I don't mind reformatting the whole thing, but I will need to back it
> up first.  I can probably attach it to my Linux box and use 'dd' to copy
> off the sectors that form the ProDOS partition.  I can then repartition
> the device so that the ProDOS partition has exactly 65534 blocks, and
> then DD the prodos filesystem back to the HD.)  If that doesn't work,
> I'll ShrinkIt everything that I currently have (about 3M of stuff) to
> 800K floppies.
>
> Any ideas, thoughts, suggestions, etc... ?
>
> --
> dennis@usb.com                           Universal Savings Bank.
>
> The three most dangerous things are a programmer with a soldering
> iron, a manager who codes, and a user who gets ideas.