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 Commands18Found volume group "new_vg"Creating new_vg-lvol0Loading new_vg-lvol0 tableResuming new_vg-lvol0 (253:2)Clearing start of logical volume "lvol0"Creating volume group backup "/etc/lvm/backup/new_vg" (seqno 5).Logical volume "lvol0" createdYou could also have used the -vv, -vvv or the -vvvv argument to display increasingly more detailsabout the command execution. The -vvvv argument provides the maximum amount of information atthis time. The following example shows only the first few lines of output for the lvcreate commandwith the -vvvv argument specified.# lvcreate -vvvv -L 50MB new_vg#lvmcmdline.c:913 Processing: lvcreate -vvvv -L 50MB new_vg#lvmcmdline.c:916 O_DIRECT will be used#config/config.c:864 Setting global/locking_type to 1#locking/locking.c:138 File-based locking selected.#config/config.c:841 Setting global/locking_dir to /var/lock/lvm#activate/activate.c:358 Getting target version for linear#ioctl/libdm-iface.c:1569 dm version OF [16384]#ioctl/libdm-iface.c:1569 dm versions OF [16384]#activate/activate.c:358 Getting target version for striped#ioctl/libdm-iface.c:1569 dm versions OF [16384]#config/config.c:864 Setting activation/mirror_region_size to 512...You can display help for any of the LVM CLI commands with the --help argument of the command.commandname --helpTo display the man page for a command, execute the man command:man commandnameThe man lvm command provides general online information about LVM.All LVM objects are referenced internally by a UUID, which is assigned when you create the object.This can be useful in a situation where you remove a physical volume called /dev/sdf which is partof a volume group and, when you plug it back in, you find that it is now /dev/sdk. LVM will still findthe physical volume because it identifies the physical volume by its UUID and not its device name. Forinformation on specifying the UUID of a physical volume when creating a physical volume, see seeSection 6.4, “Recovering Physical Volume Metadata”.4.2. Physical Volume AdministrationThis section describes the commands that perform the various aspects of physical volumeadministration.