Re: HighPoint 374

[Carlos Fernandez Sanz]

512 Mb, file was 1.3 Gb.

----- Original Message ----- 
From: "Svetoslav Slavtchev" <svetljo@xxxxxx>
To: "Carlos Fernandez Sanz" <cfs-lk@xxxxxxxxxx>
Cc: <Tomi.Orava@xxxxxxxxxxxxxxxxxx>; <linux-kernel@xxxxxxxxxxxxxxx>
Sent: Monday, October 20, 2003 21:14
Subject: Re: HighPoint 374


> > BTW, isn't m0 supposed to reduce perfomance?
>
> have to retest probably
>
> how much RAM do you have,
> isn't your test file to small
>
> svetljo
>
>
> > [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@xxxxxx>
> > To: "Tomi Orava" <Tomi.Orava@xxxxxxxxxxxxxxxxxx>
> > Cc: <linux-kernel@xxxxxxxxxxxxxxx>
> > 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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