Red Hat ENTERPRISE LINUX 4 - LVM ADMINISTRATOR Manual

Also see for ENTERPRISE LINUX 4 - DEVELOPER TOOLS GUIDE: Installation guide Installation guide Tuning guide Installation guide Manual

Contents

Chapter 4. LVM Administration with CLI Commands34[root@tng3-1 lvm]# lvremove /dev/testvg/testlvDo you really want to remove active logical volume "testlv"? [y/n]: yLogical volume "testlv" successfully removedYou could explicitly deactivate the logical volume before removing it with the lvchange -ancommand, in which case you would not see the prompt verifying whether you want to remove anactive logical volume.4.4.7. Displaying Logical VolumesThere are three commands you can use to display properties of LVM logical volumes: lvs,lvdisplay, and lvscan.The lvs command provides logical volume information in a configurable form, displaying one line perlogical volume. The lvs command provides a great deal of format control, and is useful for scripting.For information on using the lvs command to customize your output, see Section 4.9, “CustomizedReporting for LVM”.The lvdisplay command displays logical volume properties (such as size, layout, and mapping) in afixed format.The following command shows the attributes of lvol2 in vg00. If snapshot logical volumes have beencreated for this original logical volume, this command shows a list of all snapshot logical volumes andtheir status (active or inactive) as well.lvdisplay -v /dev/vg00/lvol2The lvscan command scans for all logical volumes in the system and lists them, as in the followingexample.# lvscanACTIVE '/dev/vg0/gfslv' [1.46 GB] inherit4.4.8. Growing Logical VolumesTo increase the size of a logical volume, use the lvextend command.After extending the logical volume, you will need to increase the size of the associated file system tomatch.When you extend the logical volume, you can indicate how much you want to extend the volume, orhow large you want it to be after you extend it.The following command extends the logical volumne /dev/myvg/homevol to 12 gigabytes.# lvextend -L12G /dev/myvg/homevollvextend -- extending logical volume "/dev/myvg/homevol" to 12 GB