Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Tomasz Chmielewski schrieb:
> It seems to me that for some reason it's not possible to create a
> physical volume on a DRBD device (at least on my machine, that is).
>
> Below, we can see that running "pvcreate" succeeds and than fails, then
> it succeeds again etc.:
>
> # pvcreate -d -v /dev/drbd0
> Set up physical volume for "/dev/drbd0" with 976544952 available
> sectors
> Zeroing start of device /dev/drbd0
> Physical volume "/dev/drbd0" successfully created
>
> # pvcreate -d -v /dev/drbd0
> Wiping cache of LVM-capable devices
> Set up physical volume for "/dev/drbd0" with 976544952 available
> sectors
> Zeroing start of device /dev/drbd0
> Failed to write physical volume "/dev/drbd0"
Looks like LVM doesn't like unpartitioned DRBD devices?
I added a partition to /dev/drbd0 with fdisk.
Then, I added a drive mapping with kpartx.
It works fine now.
# kpartx -a -v /dev/drbd0
add map drbd0p1 : 0 976543092 linear /dev/drbd0 63
# pvcreate -d -v /dev/mapper/drbd0p1
Set up physical volume for "/dev/mapper/drbd0p1" with 976542708
available sectors
Zeroing start of device /dev/mapper/drbd0p1
Physical volume "/dev/mapper/drbd0p1" successfully created
Anyway, why does it fail if I want to set up LVM on raw DRBD device? A
bug or a feature?
--
Tomasz Chmielewski
http://wpkg.org