[CentOS] Resize Logical Volume

Max Hetrick maxhetrick at verizon.net
Fri Feb 15 22:06:51 UTC 2008


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Ivan Arteaga wrote:

> I tried the commands you sent me and i can extend the size to the new
> value but can´t resize the file system:


> [root at mail ~]# lvextend -L+30G /dev/VolGroup00/LogVol00
>  Extending logical volume LogVol00 to 88.59 GB
>  Logical volume LogVol00 successfully resized
> [root at mail ~]# resize2fs /dev/VolGroup00/LogVol00
> resize2fs 1.35 (28-Feb-2004)
> /dev/VolGroup00/LogVol00 is mounted; can't resize a mounted filesystem!

> [root at mail ~]# df -kh
> Filesystem            Size  Used Avail Use% Mounted on
> /dev/mapper/VolGroup00-LogVol00
>                       58G   49G  5.8G  90% /
> /dev/sda1              99M   33M   62M  35% /boot
> /dev/mapper/VolGroup00-LogVol03
>                       20G  9.7G  8.6G  53% /cose
> none                 1013M     0 1013M   0% /dev/shm
> [root at mail ~]# umount /dev/VolGroup00/LogVol00
> umount: /: device is busy


> How can i umount the / filesystem?

Boot CentOS using the install CD and type linux rescue. You can run the
command there when / is unmounted. Don't mount the partitions if it asks
you to.

Max





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