Free up some space on filesystem and use space to create another.

[f. halili]

How can I get space from one file system and create another using filesystem using the space that will be freed up?

Here's my df. I would like to take some space from /opt and create /webapp2. Is this possible?

Filesystem 1K-blocks Used Available Use% Mounted on
/dev/cciss/c0d0p3 6047972 224272 5516476 4% /
/dev/cciss/c0d0p1 296307 19093 261915 7% /boot
/dev/cciss/c0d0p8 3525936 98152 3248676 3% /home
/dev/cciss/c0d0p5 5039840 32828 4750996 1% /opt
/dev/cciss/c0d0p9 2923532 32980 2742044 2% /tmp
/dev/cciss/c0d0p7 4031856 1986608 1840436 52% /usr
/dev/cciss/c0d0p6 5039840 161164 4622660 4% /var
/dev/cciss/c0d0p2 6047972 50188 5690560 1% /webapp

THANKS,
F. HALILI

[Slawomir Gora]

Hi,

there is no simple because you can't free space alocated by logical partition 5.
I think that you can use /dev/cciss/c0d0p5 in LVM vg and then create logical-volumens:
1. stop all apllications which are using /opt
2. backup /opt
cd /opt
tar cvf /tmp/opt.tar opt
3. umount /opt
4. create LVM vg group
pvcreate -f /dev/cciss/c0d0p5
vgcreate vg00 /dev/cciss/c0d0p5
5. create logical volumens for /opt and /webapp2
lvcreate -L xxxM /dev/vg00
lvcreate -L yyyM /dev/vg00
replace xxx with your /opt size
replace yyy with your /webapp2 size

6. modify /etc/fstab
for /opt
replace /dev/cciss/c0d0p5 with /dev/vg00/lvol1
create line for /webapp2 (/dev/vg00/lvol2)

6. mount volumens
mount -a

7. untar /opt
tar xvf /tmp/opt.tar


It all

[f. halili]

My linux machine is not using LVM it has a "ext3" filesystem. Here's my /etc/fstab:

[root@ISTORE /]# more /etc/fstab
LABEL=/ / ext3 defaults 1 1
LABEL=/boot /boot ext3 defaults 1 2
none /dev/pts devpts gid=5,mode=620 0 0
LABEL=/home /home ext3 defaults 1 2
LABEL=/opt /opt ext3 defaults 1 2
none /proc proc defaults 0 0
#none /dev/shm tmpfs defaults 0 0
LABEL=/tmp /tmp ext3 defaults 1 2
LABEL=/usr /usr ext3 defaults 1 2
LABEL=/var /var ext3 defaults 1 2
LABEL=/webapp /webapp ext3 defaults 1 2
/dev/cciss/c0d0p10 swap swap defaults 0 0
/dev/cdrom /mnt/cdrom udf,iso9660 noauto,owner,kudzu,ro 0 0
/dev/fd0 /mnt/floppy auto noauto,owner,kudzu 0 0
[root@ISTORE /]#

[Slawomir Gora · Accepted solution]

Hi,

LVM it not file system type but Logical Volume Manager - when you create logical volumen
you have to create file system on it (sorry I forget it my steps)
ex: for opt:
mkfs.ext3 /dev/vg00/lvol1

[Dave Falloon]

You can use parted to create destroy and resize partitions.

man parted

--Dave

[f. halili]

THANKS!