[comp.sys.mac.hardware] Summary of "Unusable Floppies"

smithc@thor.acc.stolaf.edu (Christopher A. Smithc) (01/25/91)

A few days ago I posted an article, pleading for help with a destructive FDHD 
SuperDrive, and the response was prompt and very helpful.  I was asked to 
post a summary since this is not a localised problem, so here are the 
results, and they DO work:

(1)  Clean the drive.  Radio Shack makes a cheap 3.5" drive cleaning kit; 
however, you need a program that can force the head of the disk drive to stay 
on the disk long enough for the cleaning to actually work.

(3)  Reformat the disk on an 800K drive and use it as such.  Just because the 
disk can't be formatted as a high density disk doesn't mean the disk is 
completely useless.  If worse comes to worse, the disks make great frisbess 
and coasters.

(3)  Get a copy of the "B.A.D." INIT from sumex-aim.stanford.edu.  The 
pathname of the file is:  /info-mac/init/bad-init-11.hqx.  Use anonymous ftp 
to get the file.

I did run BAD last night on a deceased high density disk.  First the Finder 
rejected the floppy, saying "Initialization failed!"  Then BAD kicked in and 
reformatted the disk, locking out bad sectors.  The disk is now usable, but 
it is not recommended that you store any valuable information a disk that 
previously had bad sectors.

Thanks for the help from everyone who responded!

Christopher A. Smith
St. Olaf College
INTERNET:  smithc@thor.acc.stolaf.edu