Chris Abrams <cja5@onetel.net.uk>,
In a message on 06 Feb 2003 15:52:25 +0000, wrote :
CA> Hi,
CA>
CA> I've just completed an installation of Red Hat Linux 8.0 on my laptop
CA> and everything is working fine except for the Iomega Parallel Port Zip
CA> 100 drive. I also have a HP Deskjet 720C printer connected to the
CA> pass-through port on the Zip. The first time I booted up, my printer was
CA> found and correctly configured. The zip drive was not found but I was
CA> able to get it working by using "modprobe imm". The zip drive and the
CA> printer appear to happily coexist together. The problem is with transfer
CA> speeds to and from the zip drive, which are incredibly slow. Previously
This is *unfortunately* normal. The parallel port Zip drives are just
plain slow. You can get better performance with an IDE Zip drive or
even better with a real SCSI Zip drive (with a supported SCSI card).
CA> I was using Mandrake Linux 8.1 and it configured the zip drive without
CA> any intervention from me and the transfer speeds were excellent. I
CA> believe the problem is related to the transfer speeds across my parallel
CA> port. After loading the imm module I checked the System log and this was
CA> the output:
CA>
CA> Feb 6 12:30:59 localhost kernel: SCSI subsystem driver Revision: 1.00
CA> Feb 6 12:30:59 localhost kernel: imm: Version 2.05 (for Linux 2.4.0)
CA> Feb 6 12:30:59 localhost kernel: imm: Found device at ID 6, Attempting
CA> to use EPP 32 bit
CA> Feb 6 12:30:59 localhost kernel: imm: Found device at ID 6, Attempting
CA> to use PS/2
CA> Feb 6 12:30:59 localhost kernel: imm: Communication established at
CA> 0x378 with ID 6 using PS/2
CA> Feb 6 12:30:59 localhost kernel: scsi0 : Iomega VPI2 (imm) interface
CA> Feb 6 12:31:01 localhost kernel: Vendor: IOMEGA Model: ZIP
CA> 100 Rev: J.67
CA> Feb 6 12:31:01 localhost kernel: Type:
CA> Direct-Access ANSI SCSI revision: 02
CA>
CA> I don't think I have an ECP/EPP parallel port but why does the system
CA> choose PS/2 to communicate with the zip drive? Could this be why
CA> transfer speeds are so slow? Is there any way I can improve transfer
CA> speeds to and from my Zip drive?
CA>
CA> My hardware is : Compaq Presario 1266 laptop with external monitor, USB
CA> keyboard, PS/2 wheelmouse; the CPU is an AMD K6-II and I have 160 MB
CA> RAM.
CA>
CA> I'd be very grateful if anyone has any suggestions.
An Adaptec SlimSCSI PCMCIA card and a true SCSI Zip drive will give you
better performance.
CA>
CA> Many thanks,
CA>
CA> Chris Abrams.
CA>
CA>
CA>
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CA>
CA>
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