AHA2790UW has speed-limit problems ?

[Matti Aarnio]

Doug Ledford <dledford at dialnet.net> replies:
> Matti Aarnio wrote:
> > Hello,
> >   Some days ago I sent a plea for fix to <linux-scsi at vger.rutgers.edu>
> > list.  As it turns out, my problem seem to relate on the chassis internal
> > ultra-wide cable, and to the devices attached to it.
....
> >   Four Ultra-Wide (SingleEnded) disks on high quality cable inside
....
> > Now my RAID0 write throughput has dropped from 12.odd MB/sec to 7.odd
> > MB/sec speed.
> 
> I take it these drives aren't speed demons on their own?  FWIW, I see 25.odd
> MB/sec sustained writes on a 4 drive RAID0 array here.

	Oh they are reasonable, the RAID0 PAIR runs at 12+ MB/sec, but the
	system has also two stand-alone disks.
	( root: 2G, /home: 4G, /usr/src: 9+9 GB RAID0 pair )

> -- 
>  Doug Ledford  <dledford at dialnet.net>

/Matti Aarnio <matti.aarnio at sonera.fi>

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