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SubjectRE: ata errors -> read-only root partition. Hardware issue?
Date


> -----Original Message-----
> From: linux-kernel-owner@vger.kernel.org
> [mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of
> jerome lacoste
> Sent: Wednesday, January 11, 2006 9:26 AM
> To: Alan Cox
> Cc: Robert Hancock; linux-kernel
> Subject: Re: ata errors -> read-only root partition. Hardware issue?
>
> On 1/11/06, jerome lacoste <jerome.lacoste@gmail.com> wrote:
> > On 1/11/06, Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> > > On Mer, 2006-01-11 at 09:30 +0100, jerome lacoste wrote:
> > > > - scan for bad blocks
> > >
> > > Read the entire disk (write will hide and clean up errors by
> > > reallocating)
> >
> > something like should be sufficient right?
> >
> > cat /dev/sdax > /dev/null
>
> I did something slightly different:
>
> root@manies:~# cat /dev/sda > /dev/null
> cat: /dev/sda: Input/output error
>
> and in dmesg, problems show again:
>
> ata3: status=0x51 { DriveReady SeekComplete Error }
> ata3: error=0x40 { UncorrectableError }
> ata3: status=0x51 { DriveReady SeekComplete Error }
> ata3: error=0x40 { UncorrectableError }
> ata3: status=0x51 { DriveReady SeekComplete Error }
> ata3: error=0x40 { UncorrectableError }
> ata3: status=0x51 { DriveReady SeekComplete Error }
> ata3: error=0x40 { UncorrectableError }
> ata3: status=0x51 { DriveReady SeekComplete Error }
> ata3: error=0x40 { UncorrectableError }
> SCSI error : <2 0 0 0> return code = 0x8000002
> sda: Current: sense key: Medium Error
> Additional sense: Unrecovered read error - auto reallocate failed
> end_request: I/O error, dev sda, sector 39088832 Buffer I/O
> error on device sda, logical block 4886104
> ata3: status=0x51 { DriveReady SeekComplete Error }
> ata3: error=0x40 { UncorrectableError }
> ....


If it is repeatable on the exact same block(s)/sector(s) every time,
and it reads lots of other blocks/sectors just fine, it is very
unlikely to be anything but a disk error.

Roger

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