[DRBD-user] LVM and DRBD

Etienne Pretorius etiennep at kingsley.co.za
Wed Feb 16 15:49:41 CET 2011

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


Thank you Roland,

I think you are right, also thank you for trying.

Etienne

On 16/02/2011 16:26, Roland Friedwagner wrote:
> IMHO this has nothing to do with drbd.
> It is probably a problem with your LVM.
>
> You may add "r|/dev/dm-.*|" to your lvm filter list.
> But this should be equal as your current lvm filter
> filter = [ "a|drbd.*|", "a|md.*|", "r|.*|" ]
> ignores it already.
>
> But you get /dev/dm-3 as PV for VG vm and dm-3 is the same
> as /dev/system/drbd.
>
> So clean up you lvm cache (to be sure)
> rm /etc/lvm/cache/.cache
>
> Do vgscan -vvv (3vvv!) and you can also see how the regexes of you
> filter gets applied.
>
> And final check your distros lvm.conf in initrd.
> You may to have to recreate initrd if you change the lvm filter.
> And keep a backup boot entry, because you may miss your root fs on
> reboot when it does exclude your system VG.
>
> Am Mittwoch 16 Februar 2011 schrieb Etienne Pretorius:
>> Hello Roland,
>>
>> I attached the output to this email.
>>
>> I noticed that DRBD is started at the end of the boot process but LVM
>> is obviously started before that.
>> That means that I have to rescan for volume groups after DRBD has
>> started, but it still does not explain why I can not use the device
>> after the reboot.
>>
>> I have made the changes to drdb.res as you have requested.
>>
>> Thank you.
>> Etienne Pretorius
>
>




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