|
[Date Prev] [Date Next] [Thread Prev] [Thread Next] [Date Index] [Thread Index]
|
RE: [PLUG] ATA100 vs ATA66
|
wow! changing the -X68/69 setting for the drives brought buffered disk
reads from 9.6Mb/s to 16.6Mb/s for the ultra66 drive and from 11.8Mb/s to
32.2MB/s for the ultra100. cache reads remained the same with the ultra100
performing slightly poorer than the ultra66.
-----Original Message-----
From: epike@isinet.com
To: plug@lists.phillylinux.org
Sent: 1/3/02 10:01 AM
Subject: Re: [PLUG] ATA100 vs ATA66
did you try hdparm -I /dev/hdX and hdparm -i /dev/hdX to see
if theyre at the correct udma modes. Personally I'd play
with hdparm especially the -d -W -c -X switches. This varies
with the disk and controller (and could crash the disk if
switched wrong).
on my computer I get readings with a promise ultra tx2 card of:
ultra 100 - peaks at around 24 mb/s
ultra 66 - around 12 mbs
also the linux I installed did not set it up optimally at boot,
so I had to put some hdparm statements in /etc/rc.d/rc.local
to speed up the disk manually. You should be able to switch
hdparm -X69 for udma100 and -X68 for udma66. But again that
depends on the disk & controller.
JOndZ
>
> I got an ATA100 card to replace the ATA66, hoping to get the added
advantage
> of the 30G ATA100 drive (2 drives, one is ATA100, the other ATA66).
However,
> the hdparm readings indicate that the buffered-cache reads decreased
in
> efficiency and the buffered disk reads pretty much stayed the same.
>
> All I did was switch the cards. Should I have to reconfigure the
kernel to
> load a different module? Does anyone have any experience doing this
type of
> thing?
>
> thanks
>
> Chris
>
> ______________________________________________________________________
> Philadelphia Linux Users Group - http://www.phillylinux.org
> Announcements-http://lists.phillylinux.org/mail/listinfo/plug-announce
> General Discussion - http://lists.phillylinux.org/mail/listinfo/plug
>
______________________________________________________________________
Philadelphia Linux Users Group - http://www.phillylinux.org
Announcements-http://lists.phillylinux.org/mail/listinfo/plug-announce
General Discussion - http://lists.phillylinux.org/mail/listinfo/plug
______________________________________________________________________
Philadelphia Linux Users Group - http://www.phillylinux.org
Announcements-http://lists.phillylinux.org/mail/listinfo/plug-announce
General Discussion - http://lists.phillylinux.org/mail/listinfo/plug
|
|