Adding a filesystem.

UNIX for Advanced & Expert Users
1

Hi All!
I need to create a new filesystem /u01 , using the existing space and giving 100GB space to /u01.

I can allocate 100Gb from / which is currently 145GB.

Following is the screen shot of my df command.

[root@localhost ~]# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/mapper/VolGroup_ID_18293-LogVol4
                     153624628    449668 145371264   1% /
/dev/sda3             10278336     64824   9691400   1% /boot
none                   4673216         0   4673216   0% /dev/shm
/dev/mapper/VolGroup_ID_18293-LogVol5
                      20384396     77920  19271008   1% /tmp
/dev/mapper/VolGroup_ID_18293-LogVol8
                      50766508   2748568  45439100   6% /usr
/dev/mapper/VolGroup_ID_18293-LogVol7
                      20609660    261064  19301660   2% /var
/dev/mapper/VolGroup_ID_18293-LogVolHome
                      19739316    191408  18545208   2% /home

I googled , but am a little confused on the steps I need to follow.
Can some one please send a link or the steps that I need to follow.

Thanks for all the help!

nua7

2

As I know to reallocate disk space on your root filesystem using LFM lvextend/lvreduce you will need to boot from emergency CD because filesystem needs to be unmounted first for this operation. As this is root filesystem, it cannot be unmounted.

3

Thanks a lot! I would be re-installing linux to achieve this.

nua7

4

I heard something about ext2live patch for ext2, that allows unmounting to be done on them. Not sure about ext3.

5

ext3 is just ext2 with journal support. All one needs to do is remove the journal, resize, re-add the journal.