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SubjectRe: Reproducable hard locks in 2.2.17. IDE related

Why don't you try my patches ontop and thin see what happens.
Then you are claiming heavy loads.

Go grab the smart-suite off of source-forge and see if you crapped out the
drives.


On Fri, 22 Sep 2000, Carsten Lang wrote:

> Hi Alan,
>
> > Uncorrectable error is the drive.
> >
>
> i don't think that we can blame the disks!
> I have 3 different drives, which produce this error after 24 hrs under heavy load.
>
> I'm very sure, that the whole IDE-stuff is broken under heavy load conditions, but i
> can't find out, what happens exactly in this case.

Yes and if you do not use the latest drivers that are backported, you can
not recover.

> > > Sep 21 23:55:44 fs1 kernel: hdb: timeout waiting for DMA
> > > Sep 21 23:55:44 fs1 kernel: hdb: irq timeout: status=0xd0 { Busy }
> > > Sep 21 23:55:44 fs1 kernel: hda: DMA disabled

This is the following problem

hda: Maxtor 71626 AP, 1554MB w/128kB Cache, CHS=789/64/63, DMA
hdb: Maxtor 91021U2, 9641MB w/512kB Cache, CHS=1229/255/63, (U)DMA
hdc: Maxtor 91021U2, 9641MB w/512kB Cache, CHS=19590/16/63, (U)DMA

We do not set the master drive to be the slower one.

DMA mode 2 and UDMA mode 2 on a via core in master/slave order can get
flaky.

> Perhaps some timeouts are not set correctly or the specs include some errors, but
> it is very strange behaviour, that with kernel 2.0.36 there was never such a problem
> with heavy loaded systems and after switching to 2.2.16 / 2.2.17 the system dies
> after a short time!!!

> I would like to help if i can, but i'm no kernel developer; all i can do is to provide
> a very heavy loaded machine (video-sequencing) with three different drives.
> I hope they haven't been destroyed by the driver, but i'm sure the drivers behaviour
> let them think they have large amounts of bad blocks.

Dude if your drives are toast because of what I did and not the stock
kernel, I will besure that the OEM replaces them.

If you have junk hardware and under an powered system and high loads cause
the spindle to slow, this is a problem that was created by not match you
hardware power needs.

> BTW: The drives were new! And checked... And ok with 2.0.38!!!!

Do they do DMA correctly?
2.0.38 does not handle heavy IO like a patched 2.2 or 2.4, because it
can't.

Cheers,

Andre Hedrick
The Linux ATA/IDE guy



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