lkml.org 
[lkml]   [2002]   [Jan]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: aic7xxx bus speed
Date
From
>Hi
>I've an aic7899: Ultra160 Wide scsi controller with a few disks
>under an alpha ds20 running.
>Now I'm having troubles getting 160MB/s bus speed on the
>actual kernels (2.4.18pre2/2.5.2pre9). On the kernel 2.2.18 and
>the redhat kernels 2.4.3-12, 2.4.9-13 I get full speed of 160MB/s.
>But on the new kernel I get just 80MB/s per bus.

You probably have IBM drives that say they are SCSI-2 yet can do
160 speeds. There is a check in the driver that prevents it from
negotiating from SCSI-2 drives so as to not blow up on SCSI-2 devices
that don't support the new negotiation message type. I have a fix
to work around IBM's mistake in the next driver release.

--
Justin
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:23    [from the cache]
©2003-2011 Jasper Spaans