[linux-lvm] wrong available size reported by df on lvm

[Iordan Iordanov]

Hi,

I wonder if anybody can help me with this. I have created two volume 
groups, each with four 67GB SCSI drives. The total reported size is 267GB. 
I have also created a single logical volume on top of each of the two 
volume groups, and a single ext3 file system on each of the two logical 
volumes. Output of all utilities looks alright, except for 'df', which 
reports the following *odd* values:

------------------------------------------------------------------
Filesystem           1k-blocks      Used Available Use% Mounted on
.
.
.
.
/dev/fe02_lvm_1/vol1 279834624     32828 274115896   1% /mnt/lvm1
/dev/fe02_lvm_2/vol1 279834624     32828 265587040   1% /mnt/lvm2
------------------------------------------------------------------

the two volume groups are fe01_lvm_1 and fe02_lvm_2, the logical volumes 
are both called vol1. Notice - the size is reported correctly. The usage 
is reported correctly. However, the Available size is wrong on both of the 
file systems!

I am also attaching output from vgdisplay, lvdisplay,

------------------------------------------------------------------
vgdisplay:
------------------------------------------------------------------

--- Volume group ---
VG Name               fe02_lvm_1
VG Access             read/write
VG Status             available/resizable
VG #                  0
MAX LV                256
Cur LV                1
Open LV               1
MAX LV Size           2 TB
Max PV                256
Cur PV                4
Act PV                4
VG Size               271.12 GB
PE Size               32 MB
Total PE              8676
Alloc PE / Size       8676 / 271.12 GB
Free  PE / Size       0 / 0
VG UUID               kdkfM2-vQEg-Ppw1-O4r8-8dvc-matc-w680LA
 
--- Volume group ---
VG Name               fe02_lvm_2
VG Access             read/write
VG Status             available/resizable
VG #                  1
MAX LV                256
Cur LV                1
Open LV               1
MAX LV Size           2 TB
Max PV                256
Cur PV                4
Act PV                4
VG Size               271.12 GB
PE Size               32 MB
Total PE              8676
Alloc PE / Size       8676 / 271.12 GB
Free  PE / Size       0 / 0
VG UUID               nnD2OW-9J5w-BFvM-Qnpt-IN8v-NOnm-UMNWa5

------------------------------------------------------------------
lvdisplay /dev/fe02_lvm_1
------------------------------------------------------------------
--- Logical volume ---
LV Name                /dev/fe02_lvm_1/vol1
VG Name                fe02_lvm_1
LV Write Access        read/write
LV Status              available
LV #                   1
# open                 1
LV Size                271.12 GB
Current LE             8676
Allocated LE           8676
Allocation             next free
Read ahead sectors     1024
Block device           58:0
------------------------------------------------------------------

------------------------------------------------------------------
lvdisplay /dev/fe02_lvm_2
------------------------------------------------------------------
--- Logical volume ---
LV Name                /dev/fe02_lvm_2/vol1
VG Name                fe02_lvm_2
LV Write Access        read/write
LV Status              available
LV #                   1
# open                 1
LV Size                271.12 GB
Current LE             8676
Allocated LE           8676
Allocation             next free
Read ahead sectors     1024
Block device           58:1
------------------------------------------------------------------

Has anybody seen this alleged bug, or can anybody explain it?  Thank you 
very much!

Sincerely yours,
Iordan Iordanov