prash wrote:
hello,
i installed the partitions using lvm on my home machine which only
has 10 GB.
here is a df -h:
mantra:/home/prash# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/rootvol-root
1.7G 200M 1.4G 13% /
tmpfs 126M 0 126M 0% /dev/shm
/dev/mapper/rootvol-home
2.8G 40M 2.6G 2% /home
/dev/mapper/rootvol-usr
1.7G 1.5G 59M 97% /usr
/dev/mapper/rootvol-usr_local
2.8G 472M 2.2G 18% /usr/local
---------------
i then realised /usr has no more free space. so, i used a combination
of lvreduce and lvextend to change the sizes a little bit and here is
the output of lvdisplay:
--------------
mantra:/home/prash# lvdisplay
--- Logical volume ---
LV Name /dev/rootvol/root
VG Name rootvol
LV UUID bgdtx8-x12o-hH3U-0GZY-iWVk-9Z0Z-dE1nUF
LV Write Access read/write
LV Status available
# open 1
LV Size 1.75 GB
Current LE 448
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 254:0
--- Logical volume ---
LV Name /dev/rootvol/usr
VG Name rootvol
LV UUID a0j5aF-ej5f-fq9y-j32N-TA1I-aLmG-zAR5xB
LV Write Access read/write
LV Status available
# open 1
LV Size 2.75 GB
Current LE 704
Segments 2
Allocation inherit
Read ahead sectors 0
Block device 254:1
--- Logical volume ---
LV Name /dev/rootvol/usr_local
VG Name rootvol
LV UUID wO8fh0-H7Wc-e1Nf-Ek6M-Ek51-r1As-ifZmhj
LV Write Access read/write
LV Status available
# open 1
LV Size 2.75 GB
Current LE 704
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 254:2
--- Logical volume ---
LV Name /dev/rootvol/home
VG Name rootvol
LV UUID JjAi4a-NqqR-8n8G-eaHU-eVQV-8sIi-hYsD0l
LV Write Access read/write
LV Status available
# open 1
LV Size 1.73 GB
Current LE 444
Segments 2
Allocation inherit
Read ahead sectors 0
Block device 254:3
--- Logical volume ---
LV Name /dev/rootvol/swap
VG Name rootvol
LV UUID ShUUbV-q6Im-fVIj-2EPF-w1jz-DUQp-CWrfDF
LV Write Access read/write
LV Status available
# open 1
LV Size 556.00 MB
Current LE 139
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 254:4
------------------------
as can be seen, it says that /dev/rootvol/usr (which is mapped to /usr)
has 2.75G now and /home has reduced to 1.73G.
my problem is that df -h is still showing the old status (/usr is still
1.7G and /home is still 2.8G)! no change at all!
how come lvdisplay is showing the changes in the logical volumes, but
df is not showing them?
i am assuming df is the right representation of my system, so what's up
with lvm?
any help will be much appreciated,
-prash.
Hello!
I did not follow this thread from it's very beginning, but did you
reduce the size of the filesystem before reducing the volume ? df shows
the size of the filesystem, not of the device underneath. Something like
ext2resize /dev/mapper/root-vol-usr
lvreduce /dev/mapper/root-vol-usr
Regards,
Ionut
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