Re: CPU usage on debian (was: Re: Memory usage on debian)
On Sun, Jan 26, 2003 at 03:03:10AM -0600, Ron Johnson wrote:
> On Sat, 2003-01-25 at 21:42, Pigeon wrote:
> > On Sat, Jan 25, 2003 at 12:20:56AM -0800, Paul Johnson wrote:
> > > On Fri, Jan 24, 2003 at 10:21:12PM +0000, Pigeon wrote:
> [snip]
> > Now, I have a UDMA66 HD, which on buffered disk reads in hdparm -t
> > gives rates of about 28Mb/s, both with the onboard VIA controller and
> > a CMD680 PCI card. I also have a Quantum Viking 4.5 SCSI drive and
> > Initio INIC-950P (9100UW) SCSI card. This only gives me around 10Mb/s
> > in hdparm -t. Seems a bit slow to me. hdparm -T gives over 200Mb/s for
> > any drive.
>
> Well, 4.5GB SCSI drives are pretty old, and 10MB/s is SCSI-2's *exact*
> max speed, so maybe you're maxing out the Viking.
I thought it was 10MHz transfer rate over a 16-bit bus (68-pin cable),
giving 20Mb/s. No? It does seem suspiciously close to the "quantum" of
SCSI speed though. Is there a decent utility that allows me to see
what transfer mode it's using, and tweak it, in the manner of hdparm
and UDMA settings? I've had a look at scsiinfo but it doesn't seem to
be able to tell me what speed the SCSI bus is being driven at.
The card itself claims 40Mb/s synchronous; I had expected to get up to
20Mb/s from the Viking. A faster and larger SCSI drive is next on my
wish list; it's good that SCSI gear is finally becoming available
without having to pay a fortune for it.
Pigeon
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