Bug#592729: pvcreate/pvresize does not autodetect PV size correctly

[Marc Dequènes (Duck)]

Package: lvm2
Version: 2.02.66-2
Severity: normal


Coin,

I'm using 4 2TB drives, mostly used in a large RAID 5 array, in a fresh installation.

The RAID tools gives:
# mdadm --detail /dev/md1
/dev/md1:
        Version : 1.2
  Creation Time : Wed Aug 11 23:41:58 2010
     Raid Level : raid5
     Array Size : 5860071168 (5588.60 GiB 6000.71 GB)
  Used Dev Size : 1953357056 (1862.87 GiB 2000.24 GB)
   Raid Devices : 4
  Total Devices : 4
    Persistence : Superblock is persistent

    Update Time : Thu Aug 12 13:30:43 2010
          State : clean
 Active Devices : 4
Working Devices : 4
 Failed Devices : 0
  Spare Devices : 0

         Layout : left-symmetric
     Chunk Size : 256K

           Name : Daneel:1  (local to host Daneel)
           UUID : bb01e6ec:ebfbdb5b:b493dcb6:3a8b0168
         Events : 926

    Number   Major   Minor   RaidDevice State
       0       8        3        0      active sync   /dev/sda3
       1       8       19        1      active sync   /dev/sdb3
       2       8       35        2      active sync   /dev/sdc3
       4       8       51        3      active sync   /dev/sdd3

But LVM tools gives:
# pvs
  PV         VG          Fmt  Attr PSize PFree  
  /dev/md1   Daneel_main lvm2 a-   5.46t 449.10g

So there is more than 500GB of "lost" space, but i guess LVM metadata do not need that much. I did not find clues in the internet (only about the famous 2TB limit, which is now lifted). I guess splitting my RAID array and merging in the same VG would some my problem, but i think it is worth mentioning, as larger disks are to come in the Squeeze lifetime, and would better be solved.

Regards.


-- System Information:
Debian Release: squeeze/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-5-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages lvm2 depends on:
ii  dmsetup                      2:1.02.48-2 The Linux Kernel Device Mapper use
ii  libc6                        2.11.2-2    Embedded GNU C Library: Shared lib
ii  libdevmapper1.02.1           2:1.02.48-2 The Linux Kernel Device Mapper use
ii  libreadline5                 5.2-7       GNU readline and history libraries
ii  libudev0                     160-1       libudev shared library
ii  lsb-base                     3.2-23.1    Linux Standard Base 3.2 init scrip

lvm2 recommends no packages.

lvm2 suggests no packages.

-- no debconf information