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SubjectRe: HighPoint 374
Date
BTW, isn't m0 supposed to reduce perfomance?

[root@fulanito wd1200jb]# time dd if=/dev/zero of=filling count=20000
bs=65536
20000+0 records in
20000+0 records out
real 0m33.763s
user 0m0.200s
sys 0m10.920s
[root@fulanito wd1200jb]# hdparm -m4 /dev/hdk

/dev/hdk:
setting multcount to 4
multcount = 4 (on)
[root@fulanito wd1200jb]# time dd if=/dev/zero of=filling count=20000
bs=65536
20000+0 records in
20000+0 records out
real 0m30.321s
user 0m0.150s
sys 0m10.630s
[root@fulanito wd1200jb]# hdparm -m0 /dev/hdk

/dev/hdk:
setting multcount to 0
multcount = 0 (off)
[root@fulanito wd1200jb]# time dd if=/dev/zero of=filling count=20000
bs=65536
20000+0 records in
20000+0 records out
real 0m30.749s
user 0m0.130s
sys 0m10.900s
[root@fulanito wd1200jb]#

----- Original Message -----
From: "Svetoslav Slavtchev" <svetljo@gmx.de>
To: "Tomi Orava" <Tomi.Orava@ncircle.nullnet.fi>
Cc: <linux-kernel@vger.kernel.org>
Sent: Monday, October 20, 2003 11:03
Subject: Re: HighPoint 374

> >
> >
> > >> Are you capable of trying if the hdparm -m0 trick
> > >> works for you ?
> > >
> > > you mean the fs corruption on soft raid or the interupts problem ?
> > > i dumped the raid setup as i couldn't find a way to debug it
> > > and my drives are pretty full again, but i'll try to free some space
> >
> > I meant the interrupt problem, because if that problem exists
> > there doesn't seem to be a reasonable way to figure out what
> > is the reason for the filesystem corruption.
> >
> > > for the interupts
> > > with test7-bk8 , acpi=off pci=noacpi &
> > > hdparm -m0 -d1 -X69 /dev/hd[a,e,g]
> > > hdparm -m16 -d1 -X69 /dev/hd[a,e,g]
> > > i don't see timeouts
> > > if i omit -m i do see them sometimes
> >
> > Ok, so if I understood you correctly, the interrupt problem
> > persists _only_ if you leave the multiple sector setting on
> > its default setting ? If you explicitly disable it, or set
> > it to maximum it works fine ? Does it work with any value ?
>
> -m4 & -m8 seems to work OK
> each time 3 runs of the dd test
> 1 to hda
> 2 to hde
>
> TCQ not activated
>
>
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