Re: Repairing corrupted IIgs hardisk?

["William Garber" <willy46pa@garberstreet.com>]

"Michael J. Mahon" <mjmahon@aol.com> wrote in message t56dnejBrK4Ug-_anZ2dnUVZ_jidnZ2d@comcast.com">news:t56dnejBrK4Ug-_anZ2dnUVZ_jidnZ2d@comcast.com...
: Mitchell Spector wrote:
: > "Michael J. Mahon" <mjmahon@aol.com> wrote:
: >
: >
: >>A2Pro wrote:
: >>
: >>>Hi!
: >>>
: >>>Mitchell Spector wrote:
: >>><--- snip --->
: >>>
: >>>>   Is there any other software worth trying, perhaps something
: >>>>like Universe Master?
: >>>
: >>><--- snip --->
: >>>
: >>>    I was going to suggest Glen Bredon's "MR.FIXIT" but it probably
: >>>won't be any help if the partition map is a mess as "MR.FIXIT" works
: >>>on partitions.  But it wouldn't hurt to try as long as you stay with
: >>>the 'test' option.
: >>
: >>I agree that it sounds like the partition table is damaged.
: >>
: >>If you could just re-write the partition table, you might find
: >>your disk intact...
: >
: >
: >     I tried Universe Master, Deliverance and Mr. Fixit, all proved
: > futile since they will only work on partitions you can *SEE*. If
: > for the partition is not visible to ProDOS, it's not visible to these
: > repair utilities. ProSel-16's volume repair option proved equally
: > as useless. Rather distrubing, I though they were more robust.
: >
: >     In the end I just gave up and re-partitioned and formatted
: > the drive, restoring from a 6 month old backup off Zip disks.
: > Not sure where the fault lies--SCSI devices improperly set up,
: > damaged internal SCSI cable, ZipGS instability, or even a faulty
: > motherboard. Whatever the case may be, even though I lost
: > only a small amount data this time, it still leaves me with little
: > confidence in storing data on the GS.
: >
: >     I really need to take the whole thing apart and get it stable
: > again, I think a new ROM 3 motherboard is a good place to
: > start. Coming up on 20 years I've owned my GS, not about to
: > give up on it yet. :)
:
: Right.
:
: You can't use any tools that work "on" partitions to work on
: the partition map, since the partition map is only accessible
: as raw disk sectors.
:
: Programs that can partition disks access them as raw disks,
: and would be a good starting point for a partition map repair
: program.
:
: In the case you had, I think I would have tried simply re-partitioning
: the disk *exactly* as it had been partitioned originally.  Odds are
: good that the partitions would then be accessible, at least for the
: purpose of creating a current backup.
:
: Then I would have proceded just as you did, but restoring from the
: new backup, then checking all partitions for correct data structures.
:
: Hopefully, recovery of the last six months worth is not too onerous...
:
: -michael

I caught this thread a bit too late to make this suggestion, but,
when I did have a RamFast SCSI and the Apple SCSI cards, I was
aware of the Apple SCSI cards and the RamFast SCSI cards drives
not being interchangeable. Perhaps this is the case here, and,
as stated above, it is a bit late to test whether I remember it
correctly. Maybe someone else has had this happen, as well.

William Garber
Email Address - willy46pa@garberstreet.com
Alt. Email - willy46pa@comcast.net
Web address - http://www.garberstreet.com