Reducing logical volume space. Will it destroy the data Please advice.

[unix syzadmin]

Hi,

Thanks for the info.

I am wondering if I can use the e2fsadm command at all. Does the e2fsadm
command work for ext3 filesystem (/dev/vg00/backup is ext3 filesystem).  The
manual page for e2fsadm command mentions only about ext2 filesystem.  Please
suggest.

root at bangapps 9.1]# df -T
Filesystem    Type   1K-blocks      Used Available Use% Mounted on
/dev/sda6     ext3     4127076    318044   3599388   9% /
/dev/sda1     ext3      101089     25878     69992  27% /boot
/dev/sda9     ext3   107470556  74325992  27685280  73% /installers
/dev/vg00/LV00
              ext2   102488500  92929728   4352756  96% /export/home
/dev/vg00/logs
              ext3    35886164  34059772      3672 100% /logs
/dev/vg00/bealogs
              ext3     5039616   4627776    155840  97% /bealogs
/dev/sda3     ext3     6048352     34604   5706508   1% /opt
none         tmpfs     2045776         0   2045776   0% /dev/shm
/dev/sda8     ext3     2063504     32872   1925812   2% /tmp
/dev/sda2     ext3    15116868   2067484  12281480  15% /usr
/dev/sda7     ext3     2063504    145256   1813428   8% /var
/dev/vg00/backup
              ext3   102002024  18301664  78518920  19% /backup

Regards,
-GnanaShekar-

On 2/16/06, Jack Challen <jack_challen at ocsl.co.uk> wrote:
>
> unix syzadmin wrote:
> > We have a RHEL AS3 server.
> > I want to execute the following command to reduce logical volume space.
> > "e2fsadm  -L -15G /dev/vg00/backup"
> > Will it destroy the data  Please advice.
>
> It shouldn't do. You'll have to umount the filesystem first (you can't
> shrink a mounted filesystem), but it should do what you want. However,
> _always_ make backups and (just as important) make sure the backups
> work! Incidentally, I'd suggest upgrading to RHEL4 as it includes LVM2
> which is _better_in_every_way.
>
> jack
>
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