Re: SCSI hard-drive partition questions

[Dennis Jenkins <dennis@usb.com>]

I have more info now:

	I attached the HD to my Mac.  Of course, the mac would not mount it.  I
ran the 'Penguin-18' program.  This is the program that loads a linux
kernel into ram, shuts down MacOS and executes the kernel's startup
code.  The program also has some diagnostic tools that will tell the
user all of the SCSI partitions.

	The drive had A single 40.1M partition of type 'APPLE PDOS'.  Note: If
you create a prodos partition using the standard MacOS software, the
type is 'Apple_ProDOS'.  The disk was missing the partition table
partition and the device driver partition.  Makes me wonder how Linux
would know about the single 40.1M partition.  Maybe if there is no valid
partition table as a stand alone partition, the drive is treated like
the raw device was a single partition.  Ie, in Linux, /dev/sda and
/dev/sda1 are different, even though at the sector level on the device
they are identical (no partitions, just a raw slice).  Does that make
sense?  Is everyone following me?  I hope so.  Anyway.

	My goal is to get the drive into a 32M ProDOS partition and an 8M HFS
partition, and to be able to mount the (available) partitions under
Prodos-8 and MacOS (and later, GS/OS).

	Maybe the ROM Ver B on my SCSI card just doesn't do partitions.  Can
anyone confirm that ROM B or C can or cannot handle partitions? 
Remember, this is NOT the high-speed SCSI card, just a normal SCSI card.

	Also, I downloaded GS/OS 5.0.4.  It did not like my SCSI card either. 
It would spontaneously reboot half-way through the boot process.  I can
not find any version of GS/OS prior to 5.0.4 on the internet.  Can
someone send me a .SDK file for a version prior so I can try it out?  I
really want to use the 'finder' to move files around on my HD.  FILER
just sucks after about 10 file copy/deletes.  

	I'm considering writing an 8 bit unix like shell for prodos so that I
can move/rename/delete files using wildcards.  Does such a thing exist
already?  I'm thinking of a .SYS file that would give the user a command
prompt.  He could type standard Unix commands, such as "cp, mv, rm, dd,
du, df, cat, find, grep", and maybe it will also include a small text
editor, similar to pico.  Maybe it will be scriptable with variables. 
Maybe I should just finish my other projects first before I start a new
one.

	Some much to do, so little time...

Dennis Jenkins wrote:
> 
> 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.

-- 
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.