Provided by: lvm2_2.02.98-6ubuntu2_amd64 
NAME
lvchange - change attributes of a logical volume
SYNOPSIS
lvchange [--addtag Tag] [-A|--autobackup {y|n}] [-a|--activate [a|e|l]{y|n}] [--alloc AllocationPolicy]
[-C|--contiguous {y|n}] [-d|--debug] [--deltag Tag] [--discards {ignore|nopassdown|passdown}] [--resync]
[-h|-?|--help] [--ignorelockingfailure] [--ignoremonitoring] [--monitor {y|n}] [--poll {y|n}] [--sysinit]
[--noudevsync] [-M|--persistent {y|n}] [--minor minor] [-P|--partial] [-p|--permission {r|rw}]
[-r|--readahead {ReadAheadSectors|auto|none}] [--refresh] [-t|--test] [-v|--verbose] [-Z|--zero {y|n}]
LogicalVolumePath [LogicalVolumePath...]
DESCRIPTION
lvchange allows you to change the attributes of a logical volume including making them known to the
kernel ready for use.
OPTIONS
See lvm(8) for common options.
-a, --activate [a|e|l]{y|n}
Controls the availability of the logical volumes for use. Communicates with the kernel device-
mapper driver via libdevmapper to activate (-ay) or deactivate (-an) the logical volumes. If
autoactivation option is used (-aay), the logical volume is activated only if it matches an item
in the activation/auto_activation_volume_list set in lvm.conf. Autoactivation is not yet
supported for logical volumes that are part of partial or clustered volume groups.
If clustered locking is enabled, -aey will activate exclusively on one node and -aly will activate
only on the local node. To deactivate only on the local node use -aln. Logical volumes with
single-host snapshots are always activated exclusively because they can only be used on one node
at once.
-C, --contiguous {y|n}
Tries to set or reset the contiguous allocation policy for logical volumes. It's only possible to
change a non-contiguous logical volume's allocation policy to contiguous, if all of the allocated
physical extents are already contiguous.
--discards {ignore|nopassdown|passdown}
Set this to ignore to ignore any discards received by a thin pool Logical Volume. Set to
nopassdown to process such discards within the thin pool itself and allow the no-longer-needed
extents to be overwritten by new data. Set to passdown (the default) to process them both within
the thin pool itself and to pass them down the underlying device.
--resync
Forces the complete resynchronization of a mirror. In normal circumstances you should not need
this option because synchronization happens automatically. Data is read from the primary mirror
device and copied to the others, so this can take a considerable amount of time - and during this
time you are without a complete redundant copy of your data.
--minor minor
Set the minor number.
--monitor {y|n}
Start or stop monitoring a mirrored or snapshot logical volume with dmeventd, if it is installed.
If a device used by a monitored mirror reports an I/O error, the failure is handled according to
mirror_image_fault_policy and mirror_log_fault_policy set in lvm.conf.
--poll {y|n}
Without polling a logical volume's backgrounded transformation process will never complete. If
there is an incomplete pvmove or lvconvert (for example, on rebooting after a crash), use --poll y
to restart the process from its last checkpoint. However, it may not be appropriate to
immediately poll a logical volume when it is activated, use --poll n to defer and then --poll y to
restart the process.
--sysinit
Indicates that lvchange(8) is being invoked from early system initialisation scripts (e.g.
rc.sysinit or an initrd), before writeable filesystems are available. As such, some functionality
needs to be disabled and this option acts as a shortcut which selects an appropriate set of
options. Currently this is equivalent to using --ignorelockingfailure, --ignoremonitoring, --poll
n and setting LVM_SUPPRESS_LOCKING_FAILURE_MESSAGES environment variable.
If --sysinit is used in conjunction with lvmetad(8) enabled and running, autoactivation is
preferred over manual activation via direct lvchange call. Logical volumes are autoactivated
according to auto_activation_volume_list set in lvm.conf(5).
--noudevsync
Disable udev synchronisation. The process will not wait for notification from udev. It will
continue irrespective of any possible udev processing in the background. You should only use this
if udev is not running or has rules that ignore the devices LVM2 creates.
--ignoremonitoring
Make no attempt to interact with dmeventd unless --monitor is specified. Do not use this if
dmeventd is already monitoring a device.
-M, --persistent {y|n}
Set to y to make the minor number specified persistent.
-p, --permission {r|rw}
Change access permission to read-only or read/write.
-r, --readahead {ReadAheadSectors|auto|none}
Set read ahead sector count of this logical volume. For volume groups with metadata in lvm1
format, this must be a value between 2 and 120 sectors. The default value is "auto" which allows
the kernel to choose a suitable value automatically. "None" is equivalent to specifying zero.
--refresh
If the logical volume is active, reload its metadata. This is not necessary in normal operation,
but may be useful if something has gone wrong or if you're doing clustering manually without a
clustered lock manager.
-Z, --zero {y|n}
Set zeroing mode for thin pool. Note: already provisioned blocks from pool in non-zero mode are
not cleared in unwritten parts when setting zero to y.
Examples
Changes the permission on volume lvol1 in volume group vg00 to be read-only:
lvchange -pr vg00/lvol1
SEE ALSO
lvm(8), lvcreate(8), vgchange(8)
Sistina Software UK LVM TOOLS 2.02.98(2) (2012-10-15) LVCHANGE(8)