Red Hat GLOBAL FILE SYSTEM 5.0, Administrator'S Manual

Page: 34 / 112

# lvcreate -v -L 50MB new_vg
Finding volume group "new_vg"
Rounding up size to full physical extent 52.00 MB
Archiving volume group "new_vg" metadata (seqno 4).
Creating logical volume lvol0
Creating volume group backup "/etc/lvm/backup/new_vg" (seqno 5).
Found volume group "new_vg"
Creating new_vg-lvol0
Loading new_vg-lvol0 table
Resuming 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" created
You could also have used the
-vv
,
-vvv
or the
-vvvv
argument to display increasingly more
details about the command execution. The
-vvvv
argument provides the maximum amount of
information at this time. The following example shows only the first few lines of output for the
lvcreate
command with 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 --help
To display the man page for a command, execute the
man
command:
man commandname
The
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
Chapter 4. LVM Administration with CLI Commands
22