ppa driver fails unaccountably

["Louis F. Melahn" <melahn@netway.com>]

I have an older Zip drive, which uses the ppa driver. I got it to work
using Potato on another PC, but on my machine I get the following
messages at boot time (when there is a disk in the drive):

parport0: PC-style at 0x378 [PCSPP]
ppa: Version 2.04 (for Linux 2.2.x)
ppa: Found device at ID 6, Attempting to use EPP 32 bit
ppa: Communication established with ID 6 using EPP 32 bit
scsi0 : Iomega VPI0 (ppa) interface
scsi : 1 host.
  Vendor: IOMEGA    Model: ZIP 100           Rev: D.13
  Type:   Direct-Access                      ANSI SCSI revision: 02
Detected scsi removable disk sda at scsi0, channel 0, id 6, lun 0
SCSI device sda: hdwr sector= 512 bytes. Sectors= 196608 [96 MB] [0.1
GB]
sda: Write Protect is off
 sda:SCSI disk error : host 0 channel 0 id 6 lun 0 return code =
27010000
 I/O error: dev 08:00, sector 0
 unable to read partition table

It is impossible to mount the drive, of course.

Now, this Zip drive used to work when I used Hamm, and it stopped
working when I upgraded to Slink (and continues to fail with Potato).
I'm assuming that this is because the ppa driver was updated in Slink.
Does anyone have any ideas as to what this means, and what I can do to
fix it?

Thanks,
L.M.