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Re: [linux-lvm] lvm2 tools can't locate pvs on entire disks




On Tue, 10 May 2005, Klaus Strebel wrote:

Miles Crawford schrieb:

I'm running into trouble here, getting the lvm scanning tools to notice PVs I have created on entire disks, like this:


pvcreate /dev/hdd

Some output:

root end root # lvm version
  LVM version:     2.01.04 (2005-02-09)
  Library version: 1.01.00-ioctl (2005-01-17)
  Driver version:  4.1.0
root end root # uname -a
Linux end.snip.net 2.6.8 #6 Sat Oct 9 20:59:02 PDT 2004 i686 GNU/Linux
root end root # lvmdiskscan
  /dev/hda1  [      111.79 GB]
  /dev/hdb1  [       18.63 GB]
  /dev/hdd1  [      186.31 GB]
  /dev/hdb2  [      127.59 GB]
  /dev/hdb3  [        2.83 GB]
  0 disks
  5 partitions
  0 LVM physical volume whole disks
  0 LVM physical volumes
root end root # pvscan
  No matching physical volumes found

Well that's odd, I know they're there.  Lets try this:

root end root # losetup /dev/loop0 /dev/hda
root end root # losetup /dev/loop1 /dev/hdd
root end root # pvscan
  PV /dev/loop0   VG media_vg   lvm2 [111.79 GB / 0    free]
  PV /dev/loop1   VG media_vg   lvm2 [186.31 GB / 0    free]
  Total: 2 [298.10 GB] / in use: 2 [298.10 GB] / in no VG: 0 [0   ]
Hi Miles,

the disks hda and hdb obviously are partitioned (they are shown as /dev/hda1 and /dev/hdb1), so don't trying to detroy these partitions, he doesn't know what the contents of, is good behaviour of lvm, isn't it ;-).

Ciao
Klaus

So, you're saying that although the lvm PVs are _not_ on partitions, the disklabel still describes some partition on the disk, so lvm is ignoring the disk as a whole as a possible PV?


-miles


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