[DRBD-user] LVM+DRBD+LVM

Alireza Nematollahi alirezan at redback.com
Tue Oct 14 19:27:28 CEST 2008

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


Could it be because you initiated the pvcreate command way too early and the DRBD resource was still in use?

________________________________
From: drbd-user-bounces at lists.linbit.com [mailto:drbd-user-bounces at lists.linbit.com] On Behalf Of Robinson, Eric
Sent: Sunday, October 12, 2008 8:39 AM
To: drbd-user at lists.linbit.com
Subject: [DRBD-user] LVM+DRBD+LVM

On two Centos 5.2 (2.6.18-92.1.10.el5) servers, I did the following:

created logical partition /dev/sda5
created PV, volume group VG01, and logical volume LV01
created drbd resource with the following options:
device     /dev/drbd0;
disk       /dev/vg01/lv01;
This worked fine. Server 1 is now primary, server 2 is secondary, both are up to date.

When trying to prepare my DRBD resource for use as a PV, I issued the command:

pvcreate /dev/drbd0

And got:

Failed to write physical volume "/dev/drbd0"

I ran:

parted -l

And got:

Number  Start   End     Size    Type      File system  Flags
 1      32.3kB  83.9GB  83.9GB  primary   ext3
 2      83.9GB  92.5GB  8587MB  primary   linux-swap
 3      92.5GB  92.6GB  123MB   primary   ext3         boot
 4      92.6GB  1198GB  1105GB  extended               lba
 5      92.6GB  1198GB  1105GB  logical
Error: Unable to open /dev/md0 - unrecognised disk label.
I ran fdisk, looked at the partition tables, and quit without saving changes.

Then I tried parted again and got:

Number  Start   End     Size    Type      File system  Flags
 1      32.3kB  83.9GB  83.9GB  primary   ext3
 2      83.9GB  92.5GB  8587MB  primary   linux-swap
 3      92.5GB  92.6GB  123MB   primary   ext3         boot
 4      92.6GB  1198GB  1105GB  extended               lba
 5      92.6GB  1198GB  1105GB  logical


Error: Unable to open /dev/drbd0 - unrecognised disk label.

Error: Unable to open /dev/md0 - unrecognised disk label.
NOTE: Now there's two unrocognized disk labels, one of which is drbd0.

So then I tried the command again:

pvcreate /dev/drbd0

And got:

Physical volume "/dev/drbd0" successfully created

What the heck?

--
Eric Robinson
Director of Information Technology
Physician Select Management, LLC
775.885.2211 x 111



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