Re: Software RAID-5 attempt to access beyond end of device...

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On Friday August 27, su@xxxxxxxxxxxxx wrote:
> Hello,
> 
> I have a problem with an Software RAID-5 at the top of 4 IDE-Drives
> connected via 2 Promise UltraTX2 (20268) IDE controller.

This is not a raid problem.  It is a problem with your filesystem or
your hardware.
I think you have reported this for both reiserfs and ext3, in which
can it is unlikely to be the filesystem.  I guess it could be in the
generic block layer...

> 
> FS is EXT3.
> Kernel 2.6.8.1	(problem occured with 2.6.7, update didn't helped)
> CPU: Pentium II 400
> Mainboard: Asus P2B-S
> 
> After 29% usage, I've got an Kernel oops and system stalls:
> -------- snip start -------------
> Aug 27 16:30:18 gharb kernel: attempt to access beyond end of device
> Aug 27 16:30:18 gharb kernel: md0: rw=1, want=6917529027856096120,
> limit=241215360

6917529027856096120 is 600000000CD0DB78 in hex.
0xCD0DB78 is 215014264 which is not beyond the end of the device.
It looks like  2 extra bits have been set at the top of the address.
This could be due to bad memory (though that is more commonly a
single-bit error, not a double bit error), or it could be the
filesystem send a bad request, possibly due to bad indexing
information that has previously been stored on disk.

I recommend running memtest for a while and confirming that it isn't a
hardware error, and then possibly following up on
linux-kernel@xxxxxxxxxxxxxxxx


NeilBrown

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