[linux-lvm] Remove a LUN from a LVM mirror cause logical volume not response

[Hal Martin]

I don't have experience doing exactly what you're doing, but have you
checked that multipath is failing over correctly when your SAN is
missing a LUN?

Can you post the output of that command with '-vvvv' added?

-Hal

On Mon, Oct 24, 2011 at 8:48 AM, Matecki, Lukas <Lukas.Matecki at lvr.de> wrote:
> Second try this time with the right subject, sry Monday -.-
>
> Hallo List,
>
> We are using LVM with SAN and multipathd. I try to setup mirroring with LVM. So I do pv create on a mpath device. vgcreate, add the pv to the vg, create a lv and setup a mirror with this:
>
> lvconvert -m1 vg<name>/lv<name> /dev/mapper/mpath0 --mirrorlog core
>
> My intention is to create a logical volume which can handle SAN Disk failure.
>
> But in this shown setup i get a error (unavailable logical volume) when one of the san LUNS is missing.
>
> Can this system work or did i need to setup a mdadm device before pvcreate ?
>
> Hope you can help me because Redhat can't... them sitting two weeks on this error / miss configuration without any solution...
>
> Greetings
>
> Luke
>
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