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authorAlasdair Kergon <agk@redhat.com>2008-10-08 12:50:13 +0000
committerAlasdair Kergon <agk@redhat.com>2008-10-08 12:50:13 +0000
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+.TH LVCHANGE 8 "LVM TOOLS #VERSION#" "Sistina Software UK" \" -*- nroff -*-
+.SH NAME
+lvchange \- change attributes of a logical volume
+.SH SYNOPSIS
+.B lvchange
+[\-\-addtag Tag]
+[\-A/\-\-autobackup y/n] [\-a/\-\-available y/n/ey/en/ly/ln]
+[\-\-alloc AllocationPolicy]
+[\-C/\-\-contiguous y/n] [\-d/\-\-debug] [\-\-deltag Tag]
+[\-\-resync]
+[\-h/\-?/\-\-help]
+[\-\-ignorelockingfailure]
+[\-\-ignoremonitoring]
+[\-\-monitor {y|n}]
+[\-M/\-\-persistent y/n] [\-\-minor minor]
+[\-P/\-\-partial]
+[\-p/\-\-permission r/w] [\-r/\-\-readahead ReadAheadSectors|auto|none]
+[\-\-refresh]
+[\-t/\-\-test]
+[\-v/\-\-verbose] LogicalVolumePath [LogicalVolumePath...]
+.SH DESCRIPTION
+lvchange allows you to change the attributes of a logical volume
+including making them known to the kernel ready for use.
+.SH OPTIONS
+See \fBlvm\fP for common options.
+.TP
+.I \-a, \-\-available y/n/ey/en/ly/ln
+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.
+.IP
+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.
+.TP
+.I \-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.
+.TP
+.I \-\-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.
+.TP
+.I \-\-minor minor
+Set the minor number.
+.TP
+.I \-\-monitor y/n
+Controls whether or not a mirrored logical volume is monitored by
+dmeventd, if it is installed.
+If a device used by a monitored mirror reports an I/O error,
+the failure is handled according to
+\fBmirror_image_fault_policy\fP and \fBmirror_log_fault_policy\fP
+set in \fBlvm.conf\fP.
+.TP
+.I \-\-ignoremonitoring
+Make no attempt to interact with dmeventd unless \-\-monitor
+is specified.
+Do not use this if dmeventd is already monitoring a device.
+.TP
+.I \-M, \-\-persistent y/n
+Set to y to make the minor number specified persistent.
+.TP
+.I \-p, \-\-permission r/w
+Change access permission to read-only or read/write.
+.TP
+.I \-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.
+.TP
+.I \-\-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.
+.SH Examples
+"lvchange -pr vg00/lvol1" changes the permission on
+volume lvol1 in volume group vg00 to be read-only.
+
+.SH SEE ALSO
+.BR lvm (8),
+.BR lvcreate (8),
+.BR vgchange (8)