RE: No SCSI Ultra 160 with Adaptec Controller
Tue, 23 Jan 2001 22:34:42 -0600

Hi Tom. Thanks for writing.

> Since this machine has Quantum drives I guess this is my
> problem. Does anyone
> know if this code is still actually necessary? It seems
> it's been there a
> while. It's disappointing to not get full performance out of
> the hardware you
> have.

Yes, that code is still necessary. There's a new aic7xxx driver by Justin
Gibbs at Adaptec which is now being beta tested which corrects this issue.
Something to note, however: the media transfer rate for those disks is at
most ~20MB/sec. Therefore, you only exceed the 80MB/sec bus speed if you
have more than 4 disks all doing maximum I/O at the same time. Since the
PowerApp.web 100 has at most 2 disks internally, you really shouldn't see
any significant performance difference.

Hope this helps.
Thanks for buying Dell!
Matt Domsch
Dell Linux Systems Group
Linux OS Development

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
Please read the FAQ at