[linux-lvm] pvscan/vgscan/lvscan error
Dave Wysochanski
dwysocha at redhat.com
Wed Feb 28 18:02:39 UTC 2007
On Sun, 2007-02-18 at 20:05 +0100, Jordi Prats wrote:
> Hello,
> I've found more errors using lvm commands. This time using vgdisplay and
> lvdisplay:
>
> # vgdisplay
> /dev/sdb: read failed after 0 of 4096 at 0: Input/output error
> /dev/sde: read failed after 0 of 4096 at 0: Input/output error
> /dev/sdf: read failed after 0 of 4096 at 0: Input/output error
> /dev/sdg: read failed after 0 of 4096 at 0: Input/output error
> /dev/sdi: read failed after 0 of 4096 at 0: Input/output error
> /dev/sdk: read failed after 0 of 4096 at 0: Input/output error
> /dev/sdl: read failed after 0 of 4096 at 0: Input/output error
> /dev/sdp: read failed after 0 of 4096 at 0: Input/output error
> --- Volume group ---
> (...)
>
> # lvdisplay
> /dev/sdb: read failed after 0 of 4096 at 0: Input/output error
> /dev/sde: read failed after 0 of 4096 at 0: Input/output error
> /dev/sdf: read failed after 0 of 4096 at 0: Input/output error
> /dev/sdg: read failed after 0 of 4096 at 0: Input/output error
> /dev/sdi: read failed after 0 of 4096 at 0: Input/output error
> /dev/sdk: read failed after 0 of 4096 at 0: Input/output error
> /dev/sdl: read failed after 0 of 4096 at 0: Input/output error
> /dev/sdp: read failed after 0 of 4096 at 0: Input/output error
> --- Logical volume ---
> (...)
>
> I don't know what is causing this. Anyone can help me with this problem?
>
> Thank you!
> Jordi
>
What kind of storage do you have?
This might happen if you have an active/passive storage array. The
passive paths won't accept I/O, but will show up in a device list. LVM
(and other processes/threads) tries to do I/O to all devices (unless
they are filtered out in /etc/lvm.conf), and so you get I/O errors.
> Jordi Prats wrote:
> > Hi all,
> > I've found that all vgscan is giving me an error. This is the output:
> >
> > # vgscan -v
> > Wiping cache of LVM-capable devices
> > Wiping internal VG cache
> > Reading all physical volumes. This may take a while...
> > Finding all volume groups
> > /dev/dm-4: read failed after 0 of 4096 at 12989693952: Input/output error
> > /dev/dm-4: read failed after 0 of 4096 at 0: Input/output error
> > Finding volume group "padicat"
> > Found volume group "padicat" using metadata type lvm2
> > Finding volume group "vg_bbdd"
> > Found volume group "vg_bbdd" using metadata type lvm2
> > Finding volume group "vg_ordal"
> > Found volume group "vg_ordal" using metadata type lvm2
> >
> > Any idea what this "Input/output error" on /dev/dm-4 does it means? What
> > is causing this error?
> >
> > Thank you!
> >
>
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