drbd-user March 2010 archive
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drbd-user: Re: [DRBD-user] kernel panic with rhel 5.4, drbd 8.3.

Re: [DRBD-user] kernel panic with rhel 5.4, drbd 8.3.2 (and 4k hard sector size on lower level device)

From: Lars Ellenberg <lars.ellenberg_at_nospam>
Date: Tue Mar 02 2010 - 15:16:30 GMT
To: atp <Andrew.Phillips@lmax.com>

On Fri, Feb 26, 2010 at 03:03:24PM +0000, atp wrote:
> Lars,
>
> The patch to 8.3.7 worked like a charm.

No, it just appears as if it did...

It will generate spurious io errors
the next time you switch to secondary,
causing drbd do detach ;-)

we are working on that, though.

> [root@drvms03 ~]# drbdadm attach vm1
> [ 3069.155936] block drbd0: Meta data's bdev logical_block_size = 4096 !
> = 512
> [ 3069.238533] block drbd0: Workaround engaged (has performance impact).
> [ 3069.317985] block drbd0: No usable activity log found.
>
> In case anyone else is searching for this solution, the storage array
> was a thecus 8800 pro with 4kb iscsi block size set causing the
> following kernel panic
>
> Unable to handle kernel NULL pointer dereference at 0000000000000000
> RIP:
> [<ffffffff8002de3c>] blk_recount_segments+0x74/0x36f
>
> Thanks again.
> Andy
>
> Andrew Phillips
> Head of Systems
>
> www.lmax.com
>
> Office: +44 203 1922509
> Mobile: +44 (0)7595 242 900
>
> LMAX | Level 2, Yellow Building | 1 Nicholas Road | London | W11 4AN

-- : Lars Ellenberg : LINBIT | Your Way to High Availability : DRBD/HA support and consulting http://www.linbit.com DRBD® and LINBIT® are registered trademarks of LINBIT, Austria. __ please don't Cc me, but send to list -- I'm subscribed _______________________________________________ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user