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I forgot to say, we're running kernel 2.4.3 + Sistina LVM patch 0.9.1b6.

> -----Original Message-----
> From: Michael S. Fischer
> Sent: Tuesday, April 03, 2001 5:09 PM
> To: 'mingo@redhat.com'; 'linux-kernel@vger.kernel.org'
> Subject: md driver doesn't notice disk going out
>
>
> Hello,
>
> We're testing lvm over md (RAID 1) for a database
> application. Part of our tests include simulating failure.
> So, we pulled the power on one of the drives, and the kernel
> reported...
>
> hdd: status error: status=0x00 { }
> hdd: drive not ready for command
> ...
> ide1: reset timed-out, status=0x80
> hdd: lost interrupt
> hdd: lost interrupt
> hdd: lost interrupt
> ...
>
> However, /proc/mdstat still reports:
>
> Personalities : [linear] [raid0] [raid1] [raid5]
> read_ahead 1024 sectors
> md1 : active raid1 hdd[1] hdb[0]
> 19925760 blocks [2/2] [UU]
>
> md0 : active raid1 hdc[1] hda[0]
> 19925760 blocks [2/2] [UU]
>
> It appears the md driver just didn't bother to notice -- and
> now all writes to the filesystem are blocked.
>
> In case it matters, here's our lvm config:
>
> --- Volume group ---
> VG Name data0_vg
> VG Access read/write
> VG Status available/resizable
> VG # 0
> MAX LV 256
> Cur LV 1
> Open LV 1
> MAX LV Size 255.99 GB
> Max PV 256
> Cur PV 2
> Act PV 2
> VG Size 38 GB
> PE Size 4 MB
> Total PE 9728
> Alloc PE / Size 7680 / 30 GB
> Free PE / Size 2048 / 8 GB
> VG UUID 6XH7Nq-JL9u-cbjw-rUoP-Kx9o-hlZN-LPhdmj
>
> --- Logical volume ---
> LV Name /dev/data0_vg/data0_lv
> VG Name data0_vg
> LV Write Access read/write
> LV Status available
> LV # 1
> # open 1
> LV Size 30 GB
> Current LE 7680
> Allocated LE 7680
> Stripes 2
> Stripe size (KByte) 16
> Allocation next free
> Read ahead sectors 120
> Block device 58:0
>
>
> --- Physical volumes ---
> PV Name (#) /dev/md0 (1)
> PV Status available / allocatable
> Total PE / Free PE 4864 / 1024
>
> PV Name (#) /dev/md1 (2)
> PV Status available / allocatable
> Total PE / Free PE 4864 / 1024
>
> Please CC: me on replies. Thanks.
>
> --
> Michael S. Fischer / michael at auctionwatch.com /
http://www.auctionwatch.com
Systems Engineer, AuctionWatch.com Inc. / Phone: +1 650 808 5842
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