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How to extend Filesystem to new disk using LVM?

Patil, Manjiri S

2008-02-13

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Hi all,

I am running RHEL 4

Here is the out put of df . I want to extend /var to another new hard
drive.

$ df

Filesystem       1K-blocks    Used Available Use% Mounted on

/dev/mapper/VolGroup00-LogVol00

              27673632 17240220  9027668 66% /

/dev/sda1          101086   39271   56596 41% /boot

none             2987092      0  2987092  0% /dev/shm

/dev/sda2         5162828  4529840   370728 93% /var



I have done following steps .

1) Added disk i.e sdb

2)run fdisk , created single partition i.e sdb1

3) Started system-config-lvm and initialized the disk and added the disk
to logical volume LGVol00 under VolGroup00. I haven't yet extended the
volume to use the new disk space .

4) Here is the output of PVSCAN

pvscan

PV /dev/sda3  VG VolGroup00  lvm2 [28.78 GB / 32.00 MB free]

PV /dev/sdb1  VG VolGroup00  lvm2 [136.69 GB / 136.69 GB free]

Total: 2 [165.47 GB] / in use: 2 [165.47 GB] / in no VG: 0 [0  ]

It shows new disk as sdb1 ( 136GB)

How do I extend /var so that it will use new disk space ? Do I have to
extend LGVol00 to use new disk space ? Can I do it through
system-config-lvm ? I know there is ext2online command but how do I use
it?



Thanks

Manz





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