> # mv file1  /zip/usr
> sd2(esp0:4:0): soft error (corrected), info = 1791975 (decimal), data =
> 00 00 00 00 17 01 00 00 00 00 3a 1e 01 39 79 01 00

I assume that sd2 (SCSI ID 4) is your JAZ disk (my ZIP, at least, only
works on IDs 5 and 6 (w/o tinkering, I haven't opened it yet) ;-).

I think that these soft errors are valid sense keys from the disk,
reporting soft, recovered errors.  The 1791975 and other "info = "
numbers are the block numbers for the errors.  This one is 800-some
MB into the JAZ.

> sd2(esp0:4:0): medium error,           info = 1857631 (decimal), data =
> 00 00 00 00 14 00 00 00 00 3b d5 01 31 7e 64 00
> mv: xpaint/color.c: input/output error, info = 1857949 (decimal), data =
> 00 00 00 00 14 00 00 00 00 3b d7 01 31 7e 64 00

These looks like real bad blocks or hard errors--the disk drive tried
several times to read the blocks, but was unable to recover the error.
The extra data might be useful if you had a manual on the JAZ drive--I
think it's all vendor-specific.

It's possible that the SCSI driver could be screwing something up and
confusing the drive, but these look like reasonable errors--especially
for a removable disk (which in my experience are not nearly as reliable
as fixed disks).

-allen

-- 
              Allen Briggs - end killing - briggs@macbsd.com