# Re: Problem with scan quality using UMAX Astra 1220S

From: Rod Pike (rodneyp@utanet.at)
Date: Thu Nov 16 2000 - 15:13:27 PST

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  On Mon, Nov 13, 2000 at 10:44:16PM +0100, Oliver Rauch wrote:
  > Rod Pike wrote:
  >
  > > > I have no idea about ide2scsi emulation. I'm not compiling my own kernel here
  > > > so it's configured however RH6.2 ships it.
  > > >
  > > > That's it for the common info between for the two machines.
  > > >
  > > > The computer that is giving problems is as follows
  > > > AMD-K6-2 550 ( 550 MHz )
  > > > 128M RAM
  > > >
  > > > The computer that is giving a cleaner scan is as follows
  > > > AMD-K6-2 333 ( 333 MHz )
  > > > 64M RAM
  > > >
  > > I throttled my 550 MHz computer back to a 333 MHz to match my other machine and
  > > isolated the scanner on the SCSI buss. I ensured both the scanner and the SCSI
  > > interface were the only terminated devices on the buss. I also scanned with
  > > two different cables. Still no improvement.
  > >
  > > Any suggestions on where I can go from here? I think I've ruled out a hardware
  > > problem.
  >
  > Hi Rod,
  >
  > some ideas:
  > 1) did you change the order of the pci devices (swap the scsi controller
  > with another pci device?)

  I'm currently using an ISA interface but I got the same results from a
  SCSI interface

  >
  > 2) do you use the most recent bios for the 550MHz Mainboard?

  I'm using the most recent supported BIOS update ( 1007.A for my P5A )
  there are beta BIOS available but I prefer to stay away from them.

  >
  > 3) Is the voltage of the 550MHz CPU correct?
  > Does the mainboard list the Amd K6-2/550 as supported CPU?

  Yes and yes.

  >
  > Are you able to put the 330MHz CPU into the 550 Mhz Board?
  > (Be careful, the my work with different voltage settings)!!

  I would like to avoid doing this but I used to have the 330 MHz CPU in
  this motherboard and I believe the scanning behaved the same way.

  As I can get good scans running TWAIN, I'm doubtful that I have a
  hardware problem.

  Are there any ways of tweaking the SCSI driver properties?

  Cheers,
  Rod

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