# Re: scsi command queuing

From: Henning Meier-Geinitz (hmg-ml@gmx.de)
Date: Fri Jun 30 2000 - 10:59:17 PDT

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  Hi,

  On Thu, Jun 29, 2000 at 12:13:23AM +0200, Oliver Rauch wrote:
  > Henning Meier-Geinitz wrote:
  >
  > > Same here. I looked at the scanning times when the backend does nothing but
  > > getting data from the scanner and ignoring it. There was no big change in
  > > scanning time (about 5 %). With the original SCSI adapter the Mustek
  > > scanners are about twice as slow as with Windows despite large (4 MB) SCSI
  > > buffers and tweaking the Linux SCSI driver.
  >
  > 4 MB images are not the problem of the umax backend.

  I am not talking about image size but about SCSI buffer size. With most
  Mustek scanners and the Mustek SCSI adapters the scan stops after each read
  command and backtracking occurs. So I am trying to scan with large buffers.
  Standard is 1 MB at the moment. The scan speed is dependant from the
  resolution and image with (but not from length).

  Bye,
  Henning

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