On Fri, Dec 28, 2007 at 12:02:40PM +0100, moi wrote: > Root FS resizes imho usually requires the Rescue mode. Perhaps when growing, > but shrinking is a bit tough... Growing can be done on-line. That means no interruption of service, no need to umount the filesystem, etc.. Shrinking must be off-line, still. And in XFS, shrinking isn't supported at all. > > You may - in rescue mode - import the Volume Group (when using LVM) and do > the resize operations. Note that usually there's no symlinks for lvm utilities in the rescue mode of the installer, so you'll have to use the following syntax: lvm vgscan lvm lvresize ... > Do not forget to do a partprobe /dev/xda, as the > kernel will still be using the old filesystem tables when resizing Eh? No, that's not needed, The lvm partitions aren't /dev/hdx or sdx. You do have to rescan the partition table if you changed the partition of the PV device. > (one of > our customers did a shrink on the root partition and ran fsck, this made a > lot of errors afterwards). Oh, that's bad. Very bad. You don't shrinking filesystem after shrinking the block device, you do it *before*. That's the opposite of growing. I.e.: * lvm vgscan * lvm vgchange -ay * resize2fs /dev/foo/bar 10G * lvm lvresize -L 10G foo/bar -- lfr 0/0
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