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pvcreate problem on new IDE disk

linux-lvm Tracy R Reed 4 participants 5 messages Apr 20, 2003 – Apr 23, 2003

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Tracy R Reed

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#0 lore raw

I just installed a new 120G IDE disk. My system currently has two 32G SCSI disks. I intend to migrate the data off of the SCSI disks on to the IDE disk.

My version info:

Linux home 2.4.19 #7 SMP Sat Apr 19 18:04:41 PDT 2003 i686 unknown unknown GNU/Linux

home:~# pvcreate --version
  LVM version:     1.95.10 (2002-05-31)
  Library version: 0.96.04-ioctl-cvs (2002-08-14)
  Driver version:  1.0.8

The drive is a 120G Maxtor IDE drive. I have a 1G partition (which I will eventually reinstall the OS onto) and a ~120G partition which I want to initialize as a physical volume, add it to a new volume group, create some LV's, and then copy the data from my existing disks into it.

   Device Boot    Start       End    Blocks   Id  System
/dev/hdd1             1      4064   2048224+  83  Linux
/dev/hdd2          4065    238216 118012608   8e  Linux LVM

But when I do the pvcreate I get this error:

home:~# pvcreate /dev/hdd2
  Failed to read existing physical volume '/dev/hdd2'
  /dev/hdd2: Couldn't find device.
  Failed to setup physical volume "/dev/hdd2"

Googling on "Failed to read existing physical volume" produces zero hits. Nothing at all. Any ideas?

Signature · 1 line
Tracy Reed      http://www.ultraviolet.org
#1 lore raw
Quoted 1 line · Tracy R Reed

/dev/hdd2: Couldn't find device.

Two things to check first:
Make sure that /dev/hdd2 exists and that other programs can
write/read it;
Run 'vgscan' and then try the pvcreate again.
[vgscan needs running after new devices are added]

Alasdair

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#2 lore raw

On Mon, Apr 21, 2003 at 12:07:15AM +0100, Alasdair G Kergon spake thusly:

Quoted 3 lines

Two things to check first:
Make sure that /dev/hdd2 exists and that other programs can
write/read it;

brw-rw---- 1 root disk 22, 66 Mar 14 2002 /dev/hdd2

Quoted 2 lines

Run 'vgscan' and then try the pvcreate again.
[vgscan needs running after new devices are added]

home:/# vgscan
  Reading all physical volumes.  This may take a while...
  Found volume group "system" using metadata type lvm1
home:/# pvcreate /dev/hdd2
  Failed to read existing physical volume '/dev/hdd2'
  Physical volume "/dev/hdd2" successfully created

It still says "failed to read" etc. but then says successfully created. Hmm...

home:/# vgextend system /dev/hdd2
  Volume group "system" successfully extended

Ok, looks like it is working ok. Now another problem...

home:/# pvmove
  Command not implemented yet.

Ugh...looks like LVM1 had it but LVM2 does not yet. Has this changed since my version?

LVM version: 1.95.10 (2002-05-31)

Even if pvmove is still nonexistant I guess I can put the new disk in another VG, create LV's over there, and manually copy the data over.

Thanks for the help!

Signature · 1 line
Tracy Reed      http://www.ultraviolet.org
#3 lore raw
Quoted 23 lines · Tracy R Reed

On Mon, Apr 21, 2003 at 12:07:15AM +0100, Alasdair G Kergon spake thusly:

Quoted 3 lines

Two things to check first:
Make sure that /dev/hdd2 exists and that other programs can
write/read it;

brw-rw---- 1 root disk 22, 66 Mar 14 2002 /dev/hdd2

Quoted 2 lines

Run 'vgscan' and then try the pvcreate again.
[vgscan needs running after new devices are added]

home:/# vgscan
  Reading all physical volumes.  This may take a while...
  Found volume group "system" using metadata type lvm1
home:/# pvcreate /dev/hdd2
  Failed to read existing physical volume '/dev/hdd2'
  Physical volume "/dev/hdd2" successfully created

It still says "failed to read" etc. but then says successfully created. Hmm...

home:/# vgextend system /dev/hdd2
  Volume group "system" successfully extended
Quoted 7 lines

Ok, looks like it is working ok. Now another problem...

home:/# pvmove
  Command not implemented yet.

Ugh...looks like LVM1 had it but LVM2 does not yet. Has this changed since my version?

You'll have it shortly with LVM 2.0 :)

Quoted 5 lines

LVM version: 1.95.10 (2002-05-31)

Even if pvmove is still nonexistant I guess I can put the new disk in another VG, create LV's over there, and manually copy the data over.

Yes.

Quoted 5 lines

Thanks for the help!

Signature · 1 line
Tracy Reed      http://www.ultraviolet.org

Regards,
Heinz -- The LVM Guy --

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Heinz Mauelshagen Sistina Software Inc.
Senior Consultant/Developer Am Sonnenhang 11
56242 Marienrachdorf Germany
[email protected] +49 2626 141200

                                                       FAX 924446

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

#4 lore raw
In reply to Tracy R Reed
Quoted 6 lines · Tracy R Reed

But when I do the pvcreate I get this error:

home:~# pvcreate /dev/hdd2
 Failed to read existing physical volume '/dev/hdd2'
 /dev/hdd2: Couldn't find device.
 Failed to setup physical volume "/dev/hdd2"

did you reboot after fdisk??