[CentOS] disk device lvm iscsi questions ....

Hal Martin hal.martin at gmail.com
Wed Nov 7 15:55:51 UTC 2012


Götz,

Did you remove the devices as well? I was working with an HP MSA and
unless you removed the devices from multipath before the firmware
update I ran into the errors you're seeing. It's because the old
devices are still known to multipath, but don't map to a LUN on the
target anymore.

https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Online_Storage_Reconfiguration_Guide/removing_devices.html

-Hal

On Tue, Nov 6, 2012 at 5:14 AM, Götz Reinicke - IT Koordinator
<goetz.reinicke at filmakademie.de> wrote:
> Hi,
>
> I have an iscsistorage which I attached to a new centos 6.3 server. I
> added logic volumes as usual, the block devices (sdb & sdc) showed up in
> dmesg; I can mount and access the stored files.
>
> Now we did an firmware software update to that storage (while
> unmounted/detached from the fileserver) and after reboot of the storage
> and reatache the iscsi nodes I do get new devices. (sdd & sde)
>
> The last time I remember a simple vgchange -ay changed all neede
> settings so that I can mount and use the volumes as expected.
>
> But this time I do get an IO error like
>
>   /dev/sun7110to_dali_LUN_3/lvol0: read failed after 0 of 4096 at
> 1610608476160: Eingabe-/Ausgabefehler
>
> but also:
>
>   1 logical volume(s) in volume group "sun7110to_dali_LUN_3" now active
>
> What might be messed up? What can I try do get the storage/filesystems
> back online?
>
>         Thanks for any sugesstion and regards . Götz
>
>
> --
> Götz Reinicke - IT-Koordinator - Filmakademie Baden-Württemberg GmbH
>
>
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