Re: Disk Repair

[GUDATH@EZINFO.VMSMAIL.ETHZ.CH (Henrik 'Ratte' Gudat)]

In <4vq3m4$85f@news.ysu.edu> be404@yfn.ysu.edu writes:

> I have a 5.25in ProDos disk on which track 0002 has been trashed.  I don't
> know enough about it to reconstruct the track.  I have inspected the disk
> with a track and sector editor and the files are intact.  The directory
> tracks are fine. Only track 0002 is bad.
> 
> Any suggestions would be greatly appreciated.

> Adalbert Goertz responds >>>>>>>>>>>>
> 
> I have the same problem with a 20SC hard drive. Any suggeestion as to how to
> repair this HD?
> What would cause this in the first place?

Dr. b0z0 replies ->

It depends on how the block got trashed:
- if it's physically damaged ("bad block"), you might want to try a low-level
  disk copier such as Copy ][+. Maybe it can rebuild the block or portions of
it.
- if it got trashed by a software bug (or virus), you have a real problem.
  You can try finding the beginning of each file and then write your own disk
catalog from scratch. You need a thorough understanding of the layout of ProDOS
disks, though.

In either case, I'd meet Mr. Fixit and see if it can recover
some of the pointers.  It's one of the greatest programs out there. Don't leave
home without!

--
Synergetix