I'm having some issues with LVM, basically it appears that I can't assign over a certain amount of my pv, where that certain amount is somewhere around 1.5TB... output from all the relevant chunks are:

ensenada:~# lvdisplay
  --- Logical volume ---
  LV Name                /dev/main/root
  VG Name                main
  LV UUID                ZR33WS-glE2-bUn6-adCX-n50C-37eX-Fc7Pde
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                7.45 GB
  Current LE             1907
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           254:0

  --- Logical volume ---
  LV Name                /dev/main/voldemort
  VG Name                main
  LV UUID                DrT0co-THRw-6Zcy-Q3PT-OiQj-4KBz-xfV0Un
  LV Write Access        read/write
  LV Status              available
  # open                 1
  LV Size                1.37 TB
  Current LE             358400
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           254:1

ensenada:~# vgdisplay
  --- Volume group ---
  VG Name               main
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  56
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               5.45 TB
  PE Size               4.00 MB
  Total PE              1428053
  Alloc PE / Size       360307 / 1.37 TB
  Free  PE / Size       1067746 / 4.07 TB
  VG UUID               ddVSIr-W9BU-XOWJ-gdSo-HZ4m-vw3M-S33Q3s

ensenada:~# pvdisplay
  --- Physical volume ---
  PV Name               /dev/sda3
  VG Name               main
  PV Size               5.45 TB / not usable 1.54 MB
  Allocatable           yes
  PE Size (KByte)       4096
  Total PE              1428053
  Free PE               1067746
  Allocated PE          360307
  PV UUID               sFxRYg-Ua60-zpMT-DMqo-tpD5-d24W-qfW31p

ensenada:~# lvcreate -n test -L 74G main
  Logical volume "test" created
ensenada:~# pvs
  PV         VG   Fmt  Attr PSize PFree
  /dev/sda3  main lvm2 a-   5.45T 4.00T
ensenada:~# lvs
  LV        VG   Attr   LSize  Origin Snap%  Move Log Copy%  Convert
  root      main -wi-ao  7.45G
  test      main -wi-a- 74.00G
  voldemort main -wi-ao  1.37T
ensenada:~# lvremove /dev/main/test
Do you really want to remove active logical volume "test"? [y/n]: y
  Logical volume "test" successfully removed
ensenada:~# lvcreate -n test -L 75G main
  device-mapper: reload ioctl failed: Invalid argument
  Aborting. Failed to activate new LV to wipe the start of it.
  LV main/test in use: not deactivating
  Unable to deactivate failed new LV. Manual intervention required.
ensenada:~# lvremove /dev/main/test
Do you really want to remove active logical volume "test"? [y/n]: y
  Logical volume "test" successfully removed
ensenada:~# lvcreate -n test -L 74G main
  Logical volume "test" created
ensenada:~# lvremove /dev/main/test
Do you really want to remove active logical volume "test"? [y/n]: y
  Logical volume "test" successfully removed
ensenada:~#

Please, someone, put me out of my misery - this is driving me nuts!

Extra info:

ensenada:~# uname -a
Linux ensenada 2.6.26-2-amd64 #1 SMP Fri Aug 14 07:12:04 UTC 2009 x86_64 GNU/Linux
ensenada:~# dpkg -l lvm2
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Cfg-files/Unpacked/Failed-cfg/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name                  Version               Description
+++-=====================-=====================-==========================================================
ii  lvm2                  2.02.39-7             The Linux Logical Volume Manager
ensenada:~#
ensenada:~# cat /etc/debian_version
5.0.1

(Erm, just remembered that I haven't got comments enabled at the mo, so if you've got fixes, please mail me! iDunno@sommitrealweird.co.uk - thanks!)