Re: HighPoint 374

[Svetoslav Slavtchev]

> 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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