ZIP drives ain't zipping

ZIP drives ain't zipping

Post by Harold J Wol » Sat, 02 Dec 1995 04:00:00

Iomega SCSI Woes
About a month ago, I purchased an Adaptec 2940 (PCI/SCSI) adapter.
Upgraded to kernel revision 1.3.15 to get the required support and .....
It seems to work OK for a Exabyte 8500 tape drive under Linux.
(I can tar out and back in).
I just purchased an IOMEGA ZIP 100 Drive and it mostly worked under WFWG 3.11
(it kind of barfed when I tried to copy a 14 MB file to the ZIP drive.).
The actual symptom was an eternal write (> 30 minutes).  I realize these thing
amajiggies are slow but really !  It took < 1 minute to copy the file on
my my C: drive.  It worked fine for smaller files.
I ran the low level format program (via a CTRL-A on bootup) and that seemed
to run forever (> 4 hours) after which I reset the system and it really
never formatted it anyway since I found a README.TXT file on the ZIP disk after
installing the EZ-SCSI stuff for Windows.

It doesn't work under Linux.  It is being partially detected.
Yes, I have tried it both with and without a cartridge in the drive.
No difference.  Shown below is the output of dmesg or var/adm/messages when
I boot my system. The line missing is (I think)

Detected scsi disk sda at scsi0, channel 0, id 5, lun 0

I seek someone who may have experienced the same under Linux and has
enlightened themselves with the correct and proper technical knowledge
to circumvent this problem.

                                  Clueless in Framingham

iaic7xxx_detect: devconfig 0x80, devstatus 0x5
aic78xx: Reading SEEPROM... done
aic7870: extended translation enabled
AIC7870 (PCI-bus):
    irq 9
    bus release time 40 bclks
    data fifo threshold 100%
        scsi id 7
        scsi selection timeout 256 ms
        scsi bus reset at power-on enabled
        scsi bus parity enabled
        scsi bus termination (low byte) enabled
aic7xxx: Downloading sequencer code..done.
Resetting the SCSI bus...
scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 2.0/2.0/2.0
scsi : 1 host.
aic7xxx: Scanning channel A for devices.
aic7xxx: target 0 now synchronous at 4.0Mb/s, offset = 0xb
  Vendor: EXABYTE   Model: EXB-8500SMBANXH1  Rev: 0458
  Type:   Sequential-Access                  ANSI SCSI revision: 02
Detected scsi tape st0 at scsi0, channel 0, id 0, lun 0
aic7xxx: target 5 refusing syncronous negotiation. Using asyncronous transfers
  Vendor: IOMEGA    Model: ZIP 100           Rev: C.18
  Type:   Direct-Access                      ANSI SCSI revision: 02

----- missing line ---------

scsi : detected 1 SCSI tape total.

Other relvant info:

cat /proc/pci
PCI devices found:
  Bus  0, device  14, function  0:
    VGA compatible controller: ATI Mach 32 (rev 1).
      Medium devsel.  IRQ 9.  
      Non-prefetchable 32 bit memory at 0xa0000000.
  Bus  0, device   6, function  0:
    SCSI storage controller: Adaptec 2940 (rev 3).
      Medium devsel.  Fast back-to-back capable.  IRQ 9.  Master Capable.  Latency=64.  Min Gnt=8.Max Lat=8.
      I/O at 0xfc00.
      Non-prefetchable 32 bit memory at 0xffbff000.
  Bus  0, device   2, function  0:
    Non-VGA device: Intel 82378IB (rev 0).
      Medium devsel.  Master Capable.  No bursts.  
  Bus  0, device   1, function  0:
    IDE controller: SMC FDC 37C665 (rev 1).
      Fast devsel.  
      I/O at 0x1f0.
      I/O at 0x3f4.
  Bus  0, device   0, function  0:
    Host bridge: Intel 82434LX Mercury/Neptune (rev 3).
      Slow devsel.  Master Capable.  Latency=64.  

cat /proc/scsi/scsi
Attached devices:
Channel: 00 Id: 00 Lun: 00
  Vendor: EXABYTE  Model: EXB-8500SMBANXH1 Rev: 0458
  Type:   Sequential-Access                ANSI SCSI revision: 02
Channel: 00 Id: 05 Lun: 00
  Vendor: IOMEGA   Model: ZIP 100          Rev: C.18
  Type:   Direct-Access                    ANSI SCSI revision: 02


1. How do you unzip a .zip file if you ain't got zip?

Well this is a compressed tar file, first rename it to zip.tar.Z, then
uncompress zip.tar.Z, then tar -tvf | more (have a look to see what happens
before you expand it), if it opens into a directory issue tar -xvf zip.tar,
if it just expands into files without a preceeding directory, make a
directory called zipsrc, move the zip.tar file into it THEN issue tar -xvf

You can check the manpages for tar & uncompress for extra info, I would
expect that you will find the zip 'C' sources inside the tar, you will then
have to compile then for your flavour of unix.


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