Re: [linux-lvm] pv_move_pe() error again :/

From: "Heinz J . Mauelshagen" <mauelshagen@sistina.com>
To: linux-lvm@sistina.com
Subject: Re: [linux-lvm] pv_move_pe() error again :/
Date: Tue, 11 Sep 2001 16:31:20 +0200	[thread overview]
Message-ID: <20010911163120.F20767@sistina.com> (raw)
In-Reply-To: <20010910173851.A3751@vestdata.no>; from lvm@ragnark.vestdata.no on Mon, Sep 10, 2001 at 05:38:51PM +0200

On Mon, Sep 10, 2001 at 05:38:51PM +0200, Ragnar Kjørstad wrote:
> On Mon, Sep 10, 2001 at 01:27:09PM +0200, Heinz J . Mauelshagen wrote:
> > But I wonder, why in your case the locking of the PE failed. Are you able to 
> > reporduce your case and provide the error code?
> 
> It was reproducable at the time - now the disk in question has been
> replaced. If it's interesting enough, I can make a phone call and see if
> I can get the broken disk back.
> 
> The error_occured in the pe_lock() call at the beginning of the
> move-operation - the one that I commented out in patch.
> 
> This is the kernel-log from the time (well, I think it was from the time
> I ran pe_move):
> Sep  6 18:10:01 argus kernel: hdd: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> Sep  6 18:10:01 argus kernel: hdd: dma_intr: error=0x10 { SectorIdNotFound }, LBAsect=155058176, sector=0
> Sep  6 18:10:01 argus kernel: lvm -- lvm_blk_ioctl: unknown command 587
> Sep  6 18:10:01 argus kernel: hdd: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> Sep  6 18:10:01 argus kernel: hdd: dma_intr: error=0x10 { SectorIdNotFound }, LBAsect=155058176, sector=0
> Sep  6 18:10:01 argus kernel: lvm -- lvm_blk_ioctl: unknown command 587
> 
> and:
> 
> Sep  6 18:15:51 argus kernel: lvm -- lvm_blk_ioctl: unknown command 587
> Sep  6 18:15:55 argus last message repeated 213 times
> Sep  6 18:15:55 argus kernel: hdd: read_intr: status=0x59 { DriveReady SeekComplete DataRequest E rror }
> Sep  6 18:15:55 argus kernel: hdd: read_intr: error=0x40 { UncorrectableError }, LBAsect=11801433 2, sector=118014332
> Sep  6 18:15:55 argus kernel: end_request: I/O error, dev 16:40 (hdd), sector 118014332

Ragnar, the block ioctl error the lvm driver shows is not related to the locking
of a physical extent, because that is achived by the PE_LOCK_UNLOCK ioctl
(0x50 BTW) using the character ioctl function.
Wasn't able to find that ioctl grepping the kernel sources.
Could it be some application checking devices regularly like a desktop
CD-ROM tool or something?

I gues your problem was just the dying disk and therefore temporarily avoiding
the read() check in pv_move_pe() should have catched this one as well.

Regards,
Heinz    -- The LVM Guy --

> 
> The kernel is standard 2.4.8 without the LVM-patches. The usersspace
> tools are version 1.0.1-rc2.
> 
> 
> 
> 
> -- 
> Ragnar Kjørstad
> Big Storage
> 
> _______________________________________________
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> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen@Sistina.com                           +49 2626 141200
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