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SubjectRe: IDE DMA/irq timeouts
Date
Ive had a few problems with irq timeouts, they were specific to my hpt366
controller.

You might want to checkout your kernel archive under /people/hedrick at
patch it with the latest ide patch from there.
Also in that directory are some txt files displaying warning specific to a
couple of ide controllers.

>
> Hi,
>
> Since upgrading our servers to kernel version 2.2.10 and 2.2.12 I have
> noticed increasing instability with the hard discs.
>
> The servers I use (all single processor configurations) present the
> following errors:
>
> hdb: irq timeout: status=0xd0 { Busy }
> hda: DMA disabled
> ide0: reset: success
> hdb: irq timeout: status=0xd0 { Busy }
> ide0: reset: success
> hdb: irq timeout: status=0xd0 { Busy }
> ide0: reset: success
>
> and
>
> hdc: timeout waiting for DMA
> hdc: irq timeout: status=0xd0 { Busy }
> hdc: DMA disabled
> ide1: reset: success
>
> and
>
> hda: dma_intr: status=0x71 { DriveReady DeviceFault SeekComplete
Error }
> hda: dma_intr: error=0x10 { SectorIdNotFound }, LBAsect=3487119,
sector=1452
> hda: DMA disabled
> hdb: DMA disabled
> ide0: reset: success
>
>
> I originally suspected that this was a problem with the hard discs as the
> BIOS has never detected FUJITSU MPC3102AT hard discs correctly (the BIOS
> recognises them as 648Mb hard discs, where they are actually 9765Mb). But
> our recent experiences with two brand new (i.e. totally unused) MPC3102AT
> hard discs suggested that the fault may lie elsewhere.
>
> We installed the MPC3102AT into a computer, partitioned and formatted the
> disk. Running e2fsck on the disk displayed many disk errors and send
several
> inodes to lost and found. The same errors occurred on the second MPC3102AT
> hard disc. We placed the hard discs into another computer (a PII 333),
where
> the BIOS correctly recognised them this time, and exactly the same problem
> occurred. The kernel used in both cases was 2.2.12.
>
> The IRQ/DMA timeouts are problematic as they are seem to be related to
> some major disk corruption. The kernel doesn't report the disk errors
> until too late, and we end up losing a about 90Mb of data to lost+found.
>
> The hard discs we use are:
> FUJITSU MPC3102ATE,
> Maxtor 91080D5
> Maxtor 91010D6
> IBM-DTTA-371440
>
> The servers are:
> Gigabyte 6A-6BXD Intel 440BX AGP chipset (motherboard)
> Pentium II 400Mhz
> 512Mb RAM
> Intel EtherexpressPro 10/100
>
>
> The hdparm settings we use on all hard discs are:
>
> /dev/hdc:
> multcount = 16 (on)
> I/O support = 1 (32-bit)
> unmaskirq = 0 (off)
> using_dma = 1 (on)
> keepsettings = 0 (off)
> nowerr = 0 (off)
> readonly = 0 (off)
> readahead = 8 (on)
> geometry = 19590/16/63, sectors = 19746720, start = 0
>
> I've heard in the past that overclocking the CPU can cause the sort of
> problem that I am seeing. However the CPUs are not overclocked on any
> of the servers.
>
> Does anybody have any thoughts on this ?
>
>
> Regards,
>
>
> Nick Burrett.
>
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