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SubjectRe: access beyond end of device errors in 2.2.13pre18 AND 2.2.5
Mark Hagger <> writes:

> kernel: attempt to access beyond end of device
> kernel: 08:0d: rw=0, want 77831577, limit=15638246

> This problem is really starting to get very worrying indeed, and I
> suspect is going to be a real pain to track down. But as it leads to
> file system corruption (and I've seen others reporting this in the
> list), surely this has to be tracked down pretty urgently? Especially
> since Redhat are now shipping 2.2.12 as their distribution kernel!

Alan Cox <> writes:

> Most cases we chased down turned out to be IDE problems, memory
> problems and the like which makes it
> _very_ hard to track down.

Well I do have a similar Problem with LVD Scsi drives (IBM DDRS)
connected to an 7890 Adaptec U2W controller (on board on Asus P2Bs);
Intel Pentium II 400MHz, 128MB RAM. Running kernel 2.2.5-22.

I suspected bad memory, so I changed it with a (similarily working)
module from another machine, but no avail.

I suspected a cable problem so I checked it.

I suspected the attached scanner and disconnected it, but no avail.

I suspected a low power supply and took 2 drives off, but no avail.

The message occurs only when doing backup on tape (the only heavy IO
situation for that machine).

Oct 27 02:00:21 iwr01 kernel: attempt to access beyond end of device
Oct 27 02:00:21 iwr01 kernel: 08:11: rw=0, want=2078145526, limit=8924076
The device numbers corresponds to /dev/sda11 but this partition did
never exist, fdisk shows correct values.

An e2fsck is needed to fix the filesystem, but things will come back some
days later.

I am a little helpless on this topic, (I will replace the whole
machine but the disks soon, just to be sure of no hardware defects).

What can I do to track the problem down?

Martin Schulz
Uni Karlsruhe, Institut f. wissenschaftliches Rechnen u. math. Modellbildung
Engesser Str. 6, 76128 Karlsruhe

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