how to shrink a default install lvm pvresize shrink

Hi, I have installed a CentOS5 with default partitioning using LVM2 into a. For example, to reduce the size of /dev/sda1 to 40 GiB: pvresize -setphysicalvolumesize 40G /dev/sda1 This command is safe, as it will refuse to do anything if the part of the PV it would cut away contains allocated extents. Without a file system check you cannot shrink root LVM partition or any other. You first must determine how large your current LogVol01 swap is so you can recreate it with the same size. Reducing a LVM physical volume that has unallocated space in it is pretty simple. Tricky on the PV that contains the root file system. resizefs does step 2 at the same time, ensuring the sizes match. In the future, it should relocate these elsewhere in the volume group if there is sufficient free space, like pvmove does.“īecause of this limitation, it is necessary to temporarily remove your LogVol01 swap LV, which is still physically allocated at the very end of your PV, then add it back such that it’s newly located immediately after the smaller LogVol00 nearer to the start of the PV (and partition). This is not possible for XFS, in which case you will need an alternative solution like restore backups to a smaller volume. Unfortunately, the current implementation of “pvresize” is lacking – from the manpage: “ pvresize will refuse to shrink PhysicalVolume if it has allocated extents after where its new end would be. There is now enough free physical space available ( lvm pvs) to shrink the physical volume by that much in order to make room for a new partition of that size or smaller. rootredhat-sysadmin lvextend -l +100FREE /dev/centos/root. Figure 8: Use the lvextend command to extend the LV. It does not depend on the position of the LV within VG, there is no need to ensure surrounding available space.

Lvm lvresize / dev / VolGroup / LogVol00 - size 50G The lvextend command allows you to extend the size of the Logical Volume from the Volume Group. Resize logical volumes regardless of their order on disk.

How to shrink a default install lvm pvresize shrink