[DRBD-user] formatting a DRBD resource

Digimer lists at alteeve.ca
Fri Jan 31 01:55:14 CET 2014

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

I knew there had to be a more sensible way. :P

On 30/01/14 07:05 PM, Arnold Krille wrote:
> Or you could just do a "pvdestroy /dev/drbd/by-res/<name>" on the host...
> Sorry for the tofu..
> Digimer <lists at alteeve.ca> schrieb:
>     On 29/01/14 06:40 PM, Paul O'Rorke wrote:
>         Hi all,
>         a quick question. I have a DRBD resource that was once used as a
>         drive
>         for a Linux machine that used LVM. I want to create a new VM (KVM
>         based) that uses this resource. I can start the installation OK
>         - the
>         installer 'sees' the 300GB drive (/dev/drbd/by-res/<resource>)
>         but when
>         I try using the partition manager in the Debian (guest) installer it
>         complains that there is already LVM data on there and it won't
>         allow me
>         to use the drive without first cleaning up the LVM config on there.
>         Is it possible to mount the resource in the host and use the command
>         line LVM tools to 'clean' that up? I was thinking that maybe I could
>         use *dd* to clone a new clean resource of the same size but that
>         seems
>         silly.
>         Does anyone have any suggestions for 'formatting' this resource
>         so that
>         it looks again like a clean un-partitioned disk?
>         Thanks in advance.
>     Simplest would be to write zeros to the device;
>     dd if=/dev/zero of=/dev/drbd/by-res/<resource> bs=4M
>     If you know that the LVM metadata is at the first or end of the drive,
>     you can limit the dd to count=X or use of offset to hit the end of the
>     resource.
> --
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> gesendet.

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