[net.micro.mac] OOOPs, need floppy disk utility

jah@briar.UUCP (Julie Harazduk) (08/14/86)

On a single floppy disk, I had two folders.  One of them contained 3 MacDraw
images.  I selected the first (one click on icon with mouse) and used the
pulldown menu to "print" (not inside the MacDraw application).  It seemed
like a nice shortcut, until it crashed.  My floppy was in the disk drive
when all this happened.  The mouse froze and there was no keyboard response,
so I powered down (the floppy ejected) and then powered up.  I rebooted the
system from the hard disk system floppy and then attempted to read my original
disk.  The error message was as follows:

	
	System error.   This disk is unreadable.
	Do you want to initialize?

I answered "EJECT."  I tried to get some help from the systems people around
here but we don't have any utilities to read unformatted disks.  I suspect
that one of the files on the disk is corrupted (the one I tried to Print),
but I don't think all of them are.

Does anybody out there have a utility that either: helps read unformatted
disks, or finds the next file on the disk?  Even a diagnostic utility that
can explain what's wrong?  I'd rather not through it away.

	Thanks in advance,
	Julie A. Harazduk  {ihnp4|seismo}!philabs!jah

baron@runx.OZ (Jason Haines) (08/24/86)

The problem of unmountable disks caused by a crash can usually be fixed by
using a program like Copy ][ Mac to sector copy the damaged disk. Usually,
the error status indicator on Copy ][ Mac shows one or two sectors have been
clobbered. Copy ][ Mac reacts by writing out zeroes to the respective sectors
on the target disk. 

9 times out of ten you will find that the duplicate disk (with errors removed)
will mount properly.

jason ( baron@runx.oz && jasonh@psych44.su )