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Re: HFS floppy to PRODOS FST copy corruption: FOLLOWUP
Everything edited for reading purposes:
Recap of suggestions:
---------------------
Nathan Mates suggested:
----------------------
> >-Sirius 8meg RAM card
> >-Apple HighSpeed DMA SCSI card
>
1) > Hmmmm. Some people noted strange interactions between those two.
> Would you care to try disabling DMA on the HS SCSI card and repeating
> problems? [If this does fix the problem, I'll lean towards warning
> people against this combo in the FAQ.]
2) > I'm not totally sure that GSHK is the most reliable indicator of
> damage... some people have reported that it fails to open known good
> .SHK files on their systems while Shrinkit 3.4 works fine. This
> appears to be very transient-- all the files they pointed out to me
> uncompressed fine on my GS. Do you have Shrinkit 3.4 around to test
> on these files.
3) > Filesize has not been affected by the HFS FST bug, only the
> calculation of which block on disk to read. Thus, the file sizes will
> be right,but the contents won't.
4) > Have you tried a shiftboot to the Finder before this copy? There
> may be something trashing the Finder's buffers while copying. [Fairly
> unlikely, but I'm trying to test all possibilities.]
Somebody else suggested:
------------------------
1) > Hi,
>
> The Apple High Speed SCSI card must be configured to work with the
> Sirus at 8MB. To do this, open up the computer and look at the Apple
> card. Find the bank of 4 DIP switches and move switch number 1 to the
> "open" (ie. up) postion. That should completely solve your problems.
> Otherwise, GSHK other programs will have trouble when accessing the
> hard drive.
>
> Good luck.
Peter F Handel suggested:
------------------------
1) > Try using ProSel 16's "K-Compare Files" feature in the second
> Utilities menu (this should work with a HFS disk). I'd be curious to
> see if the files are identical or if only one or two bytes are off.
> If the latter is the case, you might have a bad ram chip - I believe
> Glen Bredon mentioned in the documentation for Rx-Gs (or Gs-Rx?) that
> his Rx-Gs flagged differences in the stored checksums of his files and
> their actual checksums after he optimized his drive, which was caused
> by a bad ram chip. If so, try using one of theram card checkers, such
> as the one that came with AppleWorks GS.
>
> By the way, does anyone know why only the "Compare Files" feature in
> ProSel 16 v8.84 doesn't support file browsing ("?" etc.) like all the
> other features do? I use it quite frequently, and having to manually
> type long pathnames/filenames gets kinda annoying.
>
>
> Thanks,
> Pete
Joe Walters suggested:
----------------------
> >I installed System 6.0.1, the GUPP patch and the HFS patch found in
> >"patchhfs.shk". (tips found on the excellent Nathan Mates webpages)
>
> I believe that the HFS patch is part of GUPP so perhaps you should try
> removing it and going with just the GUPP.
>
> If that doesn't work then try an unpatched version. If that works then
> contact Nathan asap!
>
> Kind Regards,
Greg J. Buchner suggested:
--------------------------
> > -Sirius 8meg RAM card
> > -Apple HighSpeed DMA SCSI card
>
1) > I'd have to say that it is these two cards that are causing your
> problem, IF you are using DMA on the SCSI card and don't have a
> ramdisk set up on the ramcard. The Apple HS SCSI card can only
> do DMA with the first 4MB of memory. Anything after that and
> supposedly you can have problems.
> I have an AE GS-Ram+ with 6MB on it and was told that I would have
> problems if I didn't turn off the DMA on my HS SCSI card. I opted
> to try a different route and set up a 2MB ramdisk on my GS so that
> there would only be 4MB for the card to directly access as memory.
> It seems to be working just fine for me.
>
> It would seem to me that you have three options:
> 1. turn off DMA on the SCSI card and have slower HD access
> 2. set up a ramdisk to limit your memory to 4MB on the ramcard
> and give yourself less memory on your GS
> 3. get a Ramfact SCSI card, which as I understand it, would
> still have the DMA problem, but would be just has fast as
> the Apple HS SCSI card that had DMA turned on.
> Hope this helps, although it's probably not an answer you wanted
> to hear.
>
> Greg B.
Tests and solution:
-------------------
test 1: Only Gupp installed: still having the problem
test 2: GUPP and Patchfs installed: still having the problem
test 3: Turned off DMA on the Apple HighSpeed DMA SCSI card:
--------> EVERYTHING WORKS FINE !!!!!!! <----------
So, like 3 suggestions stated:
this Sirius Card is NOT 8Mb DMA compatible with the Apple HighSpeed DMA
SCSI card.
Luckily it doesn't seem to slow down disk transfers too much to be annoyed
about
not being able to use the DMA feature.
Anyway: Many thanks for all the suggestions, I appreciate.
Kind regards.
Now I only need to find me an Ensoniq chip.... the one one the motherboard
is bad..... sigh....
(I know it's not socketed, but I already repaired Sun 3 system boards, so
that isn't a problem)
Thanks again all.
--
--------------------------
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--------------------------