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Re: Tool for detecting partition superblocks needed



Hi Gaudenz

Thanks a lot for your response.

After quite a few tests I'm still stuck with a non-loading root
partition.

That is, I get to the first boot prompt from where I can choose to
start a CD, Linux or OS X. Both the CD and OS X can be booted. Linux
doesn't boot.

On Wed, Oct 01, 2008 at 05:35:45PM +0200, Gaudenz Steinlin wrote:
> Hi
> 
> On Wed, Oct 01, 2008 at 04:46:11PM +0200, Wolfgang Pfeiffer wrote:
> > Hi All
> > 
> > I can't e2fsck my root partition any more - looks seriously like that
> > partition went belly up on me. [ ... ]
> > 
> > Affected machine is a Powerbook5,8a

Typo. Should say: Powerbook5,8

> 
> If you are able to download and burn a CD, trying one of the Lenny beta CDs
> might help. They have a special rescue mode included. I'm not sure though if
> dumpe2fs is included.

Didn't help: neither dumpe2fs nor smartctl is on that CD ... strange
thing is, that OS X on its own partition, on the same drive, is still
booting. I even updated successfully OS X on its disk partition ... So
it's not clear to me yet whether this disk (hda) is really hosed or not.

Excerpt from the Debian install syslog, cut:

kernel: hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
kernel: hda: dma_intr: error=0x40 { UncorrectableError }, LBAsect=76724680, high=4, low=9615816, sector=76724680
kernel: ide: failed opcode was: unknown
kernel: end_request: I/O error, dev hda, sector 76724680
kernel: Buffer I/O error on device hda7, logical block 1
kernel: hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
kernel: hda: dma_intr: error=0x40 { UncorrectableError }, LBAsect=76724676, high=4, low=9615812, sector=76724676
kernel: ide: failed opcode was: unknown
kernel: end_request: I/O error, dev hda, sector 76724676
kernel: Buffer I/O error on device hda7, logical block 0
kernel: hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
kernel: hda: dma_intr: error=0x40 { UncorrectableError }, LBAsect=76724680, high=4, low=9615816, sector=76724680
kernel: ide: failed opcode was: unknown
kernel: end_request: I/O error, dev hda, sector 76724680

... and the errors on sectors 76724680 and 76724680 are reported again
and again ... and only these 2 sectors, IINM ..

Failing hda7 is the root partition. hda6, not being listed here, with
quite a few errors, was recoverable ... tho it's not quite clear
whether this hda6 errors started while I was playing with the Debian
Installer (Etch, IIRC) ...

IIRC:
the installer later on didn't even see hda7, whereas mac-fdisk did
(took quite some time for it to finish the detection ...).

"Apple Hardware Test" on the OS X install CD seems to hang/crash, or
simply does not load even after 15 Minutes or so ...

Oh, and I was playing with libfreevec, on Linux, before this happened ...

Whatever. If everyone else understands as much as I do, I'll try to
reinstall (ask me someone why I hate that idea ... :)

Thanks again, Gaudenz ... :)

Best Regards
Wolfgang

-- 
heelsbroke.blogspot.com


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