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Resizing Linux Root Volume Group

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The following is a description of how to reduce a swap logical volume and add the space to root. This was tested on CentOS 4, but should work with many other Linux distributions. Non-root logical volumes are similar, except they can be resized without booting from CD-ROM.

swapoff -a
lvreduce -L 16G /dev/VolGroup00/SwapVol00
mkswap /dev/VolGroup00/SwapVol00
swapon -a
lvresize -L 10G /dev/VolGroup00/RootVol00

reboot from the CD-ROM as "linux rescue", mount the items as read-only. At the prompt, unmount all filesystems in syslinux, then:

resize2fs  /dev/VolGroup00/RootVol00 9G

Done.
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