Re: ProDOS Error $5A "Baked bit-map"

[shack@onyx.southwind.net (Randy Shackelford)]

John David Duncan (jdd@efn.org) wrote:
: I have a Laser 128 and RamFast.  Today, I discovered that one of my
: Appleworks files had been overwritten by nulls (Appleworks actually
: crashed trying to load it in).  Luckily, I have a backup copy of that
: file.

: Using Davex, I decided to delete the bad file and rename the backup.  When
: I tried this, though, I got prodos error $5A -- "baked bit-map" as the
: friendly davex error table says.  I then tested this hard drive with Mr.
: Fixit, but didn't see any terrible-looking errors.

: Any insight into what this error message means and what I can do about it?

Don't have my error chart to double check the error code, but sounds like the
error called "bit map disk address is impossible" in Apple's documentation.
That means there's a bit set in the bit map which corresponds to a nonexistent
block on that volume. You could take a block editor and write zeroes to the 
upper bit map blocks on the volume to cure it.
--
Randy Shackelford
shack@southwind.net