инструменты LVM2 (LVM2 tools)
Имя (Name)
lvm — LVM2 tools
Синопсис (Synopsis)
lvm [command|file]
Описание (Description)
The Logical Volume Manager (LVM) provides tools to create virtual
block devices from physical devices. Virtual devices may be
easier to manage than physical devices, and can have capabilities
beyond what the physical devices provide themselves. A Volume
Group (VG) is a collection of one or more physical devices, each
called a Physical Volume (PV). A Logical Volume (LV) is a
virtual block device that can be used by the system or
applications. Each block of data in an LV is stored on one or
more PV in the VG, according to algorithms implemented by Device
Mapper (DM) in the kernel.
The lvm command, and other commands listed below, are the
command-line tools for LVM. A separate manual page describes
each command in detail.
If lvm is invoked with no arguments it presents a readline prompt
(assuming it was compiled with readline support). LVM commands
may be entered interactively at this prompt with readline
facilities including history and command name and option
completion. Refer to readline(3) for details.
If lvm is invoked with argv[0] set to the name of a specific LVM
command (for example by using a hard or soft link) it acts as
that command.
On invocation, lvm requires that only the standard file
descriptors stdin, stdout and stderr are available. If others
are found, they get closed and messages are issued warning about
the leak. This warning can be suppressed by setting the
environment variable LVM_SUPPRESS_FD_WARNINGS.
Where commands take VG or LV names as arguments, the full path
name is optional. An LV called "lvol0" in a VG called "vg0" can
be specified as "vg0/lvol0". Where a list of VGs is required but
is left empty, a list of all VGs will be substituted. Where a
list of LVs is required but a VG is given, a list of all the LVs
in that VG will be substituted. So lvdisplay vg0 will display
all the LVs in "vg0". Tags can also be used - see --addtag
below.
One advantage of using the built-in shell is that configuration
information gets cached internally between commands.
A file containing a simple script with one command per line can
also be given on the command line. The script can also be
executed directly if the first line is #! followed by the
absolute path of lvm.
Additional hyphens within option names are ignored. For example,
--readonly and --read-only are both accepted.
