Re: hdparm
Gary L. Hennigan wrote:
> Alexander <vulture@abac.com> writes:
> | Timing buffered disk reads: 32 MB in 6.87 seconds = 4.66 MB/sec
> |
> | Buffer-cache reads? Uh... explain that to me please, this particular UDMA
> | can't go past 33 MB/s.
>
> The fastest disks manufactured are currently the
> 10,000RPM drives, e.g., Seagate Cheetah, and their peak performance is
> 20MB/s, and that's peak, which means probably only when
> reading/writing data on the outter tracks would you ever get that
> rate.
Right.
Here's what I get on an alpha box with a 4.3 GB Seagate Cheetah (running
Red Hat Linux, sorry!)
# /sbin/hdparm -t -T /dev/sda3
/dev/sda3:
Timing buffer-cache reads: 32 MB in 0.31 seconds =103.76 MB/sec
Timing buffered disk reads: 16 MB in 1.17 seconds =13.65 MB/sec
The system feels very fast.
--
Peter Galbraith, research scientist <GalbraithP@dfo-mpo.gc.ca>
Maurice Lamontagne Institute, Department of Fisheries and Oceans Canada
P.O. Box 1000, Mont-Joli Qc, G5H 3Z4 Canada. 418-775-0852 FAX: 775-0546
6623'rd Linux user at the Linux Counter -- http://counter.li.org/
--
Unsubscribe? mail -s unsubscribe debian-user-request@lists.debian.org < /dev/null
Reply to:
- References:
- Re: hdparm
- From: glhenni@cs.sandia.gov (Gary L. Hennigan)