Re: [SLUG] SATA, hdparm raid resync

2004-05-24 Thread David Kempe
Glen Turner wrote: Yep. RAID re-sync is deliberately limited. The idea being that disk performance isn't affected too greatly whilst re-syncing the drive (so your application stays running, the reason you RAIDed in the first place). Under Linux 2.4 see proc/sys/dev/raid/speed_limit_max makes sense

Re: [SLUG] SATA, hdparm raid resync

2004-05-24 Thread Glen Turner
On Sat, 2004-05-22 at 08:43, David Kempe wrote: > Hey anyone have a simple explanation for this phenomenom? Yep. RAID re-sync is deliberately limited. The idea being that disk performance isn't affected too greatly whilst re-syncing the drive (so your application stays running, the reason you RAID

Re: [SLUG] SATA, hdparm raid resync

2004-05-22 Thread Benno
On Sat May 22, 2004 at 09:13:53 +1000, David Kempe wrote: >Hey anyone have a simple explanation for this phenomenom? >I have 2 * 120Gb SATA drives on an Intel ICH5 controller. >My hdparm scores for both drives are : > >scythe:~# hdparm -t /dev/hdc > >/dev/hdc: > Timing buffered disk reads: 168 MB

Re: [SLUG] SATA, hdparm raid resync

2004-05-22 Thread James Gray
On Sat, 22 May 2004 09:13 am, David Kempe wrote: > Hey anyone have a simple explanation for this phenomenom? > I have 2 * 120Gb SATA drives on an Intel ICH5 controller. > My hdparm scores for both drives are : > > scythe:~# hdparm -t /dev/hdc > > /dev/hdc: > Timing buffered disk reads: 168 MB in

Re: [SLUG] SATA, hdparm raid resync

2004-05-21 Thread Alec Thomas
David, This is very probably because both of your drives are on the same IDE channel. Try having one on hda and one on hdc. Regards, Alec On Sat, May 22, 2004 at 09:13:53AM +1000, David Kempe wrote: > Hey anyone have a simple explanation for this phenomenom? > I have 2 * 120Gb SATA drives on an

Re: [SLUG] SATA, hdparm raid resync

2004-05-21 Thread David Kempe
[EMAIL PROTECTED] wrote: Why does the output for hdd display hda? i pasted the wrong thing and changed it :) its meant to be hdd in the output as well :) dave -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html

Re: [SLUG] SATA, hdparm raid resync

2004-05-21 Thread mlh
On Sat, 22 May 2004 09:13:53 +1000 David Kempe <[EMAIL PROTECTED]> wrote: > > scythe:~# hdparm -t /dev/hdd > > /dev/hda: > Timing buffered disk reads: 168 MB in 3.00 seconds = 55.93 MB/sec Why does the output for hdd display hda? -- SLUG - Sydney Linux User's Group Mailing List - http:/

[SLUG] SATA, hdparm raid resync

2004-05-21 Thread David Kempe
Hey anyone have a simple explanation for this phenomenom? I have 2 * 120Gb SATA drives on an Intel ICH5 controller. My hdparm scores for both drives are : scythe:~# hdparm -t /dev/hdc /dev/hdc: Timing buffered disk reads: 168 MB in 3.02 seconds = 55.55 MB/sec scythe:~# hdparm -t /dev/hdd /dev/h