man/lvchange.8.in

   1 .TH LVCHANGE 8 "LVM TOOLS #VERSION#" "Sistina Software UK" \" -*- nroff -*-
   2 .SH NAME
   3 lvchange \- change attributes of a logical volume
   4 .SH SYNOPSIS
   5 .B lvchange
   6 .RB [ \-\-addtag
   7 .IR Tag ]
   8 .RB [ \-A | \-\-autobackup
   9 .RI { y | n }]
  10 .RB [ \-a | \-\-activate
  11 .RI [ a | e | l ]{ y | n }]
  12 .RB [ \-\-alloc
  13 .IR AllocationPolicy ]
  14 .RB [ \-C | \-\-contiguous
  15 .RI { y | n }]
  16 .RB [ \-d | \-\-debug ]
  17 .RB [ \-\-deltag
  18 .IR Tag ]
  19 .RB [ \-\-discard
  20 .RI { ignore | nopassdown | passdown }]
  21 .RB [ \-\-resync ]
  22 .RB [ \-h | \-? | \-\-help ]
  23 .RB [ \-\-ignorelockingfailure ]
  24 .RB [ \-\-ignoremonitoring ]
  25 .RB [ \-\-monitor
  26 .RI { y | n }]
  27 .RB [ \-\-poll
  28 .RI { y | n }]
  29 .RB [ \-\-sysinit ]
  30 .RB [ \-\-noudevsync ]
  31 .RB [ \-M | \-\-persistent
  32 .RI { y | n }]
  33 .RB [ \-\-minor
  34 .IR minor ]
  35 .RB [ \-P | \-\-partial ]
  36 .RB [ \-p | \-\-permission
  37 .RI { r | rw }]
  38 .RB [ \-r | \-\-readahead
  39 .RI { ReadAheadSectors | auto | none }]
  40 .RB [ \-\-refresh ]
  41 .RB [ \-t | \-\-test ]
  42 .RB [ \-v | \-\-verbose ]
  43 .RB [ \-Z | \-\-zero
  44 .RI { y | n }]
  45 .I LogicalVolumePath
  46 .RI [ LogicalVolumePath ...]
  47 .SH DESCRIPTION
  48 lvchange allows you to change the attributes of a logical volume
  49 including making them known to the kernel ready for use.
  50 .SH OPTIONS
  51 See \fBlvm\fP(8) for common options.
  52 .TP
  53 .BR \-a ", " \-\-activate " [" \fIa | \fIe | \fIl ]{ \fIy | \fIn }
  54 Controls the availability of the logical volumes for use.
  55 Communicates with the kernel device-mapper driver via
  56 libdevmapper to activate (\-ay) or deactivate (\-an) the
  57 logical volumes. If autoactivation option is used (\-aay),
  58 the logical volume is activated only if it matches an item in
  59 the activation/auto_activation_volume_list set in lvm.conf.
  60 Autoactivation is not yet supported for logical volumes that
  61 are part of partial or clustered volume groups.
  62 .IP
  63 If clustered locking is enabled, -aey will activate exclusively
  64 on one node and -aly will activate only on the local node.
  65 To deactivate only on the local node use -aln.
  66 Logical volumes with single-host snapshots are always activated
  67 exclusively because they can only be used on one node at once.
  68 .TP
  69 .BR \-C ", " \-\-contiguous " {" \fIy | \fIn }
  70 Tries to set or reset the contiguous allocation policy for
  71 logical volumes. It's only possible to change a non-contiguous
  72 logical volume's allocation policy to contiguous, if all of the
  73 allocated physical extents are already contiguous.
  74 .TP
  75 .BR \-\-discard " {" \fIignore | \fInopassdown | \fIpassdown }
  76 Change discard behavior.
  77 .TP
  78 .B \-\-resync
  79 Forces the complete resynchronization of a mirror.  In normal
  80 circumstances you should not need this option because synchronization
  81 happens automatically.  Data is read from the primary mirror device
  82 and copied to the others, so this can take a considerable amount of
  83 time - and during this time you are without a complete redundant copy
  84 of your data.
  85 .TP
  86 .B \-\-minor \fIminor
  87 Set the minor number.
  88 .TP
  89 .BR \-\-monitor " {" \fIy | \fIn }
  90 Start or stop monitoring a mirrored or snapshot logical volume with
  91 dmeventd, if it is installed.
  92 If a device used by a monitored mirror reports an I/O error,
  93 the failure is handled according to
  94 \fBmirror_image_fault_policy\fP and \fBmirror_log_fault_policy\fP
  95 set in \fBlvm.conf\fP.
  96 .TP
  97 .BR \-\-poll " {" \fIy | \fIn }
  98 Without polling a logical volume's backgrounded transformation process
  99 will never complete.  If there is an incomplete pvmove or lvconvert (for
 100 example, on rebooting after a crash), use \fB\-\-poll y\fP to restart the
 101 process from its last checkpoint.  However, it may not be appropriate to
 102 immediately poll a logical volume when it is activated, use
 103 \fB\-\-poll n\fP to defer and then \fB\-\-poll y\fP to restart the process.
 104 .TP
 105 .B \-\-sysinit
 106 Indicates that \fBlvchange\fP(8) is being invoked from early system
 107 initialisation scripts (e.g. rc.sysinit or an initrd),
 108 before writeable filesystems are available. As such,
 109 some functionality needs to be disabled and this option
 110 acts as a shortcut which selects an appropriate set of options. Currently
 111 this is equivalent to using  \fB\-\-ignorelockingfailure\fP,
 112 \fB\-\-ignoremonitoring\fP, \fB\-\-poll n\fP and setting
 113 \fBLVM_SUPPRESS_LOCKING_FAILURE_MESSAGES\fP
 114 environment variable.
 115
 116 If \fB\-\-sysinit\fP is used in conjunction with lvmetad(8) enabled and running,
 117 autoactivation is preferred over manual activation via direct lvchange call.
 118 Logical volumes are autoactivated according to auto_activation_volume_list
 119 set in lvm.conf(5).
 120 .TP
 121 .B \-\-noudevsync
 122 Disable udev synchronisation. The
 123 process will not wait for notification from udev.
 124 It will continue irrespective of any possible udev processing
 125 in the background.  You should only use this if udev is not running
 126 or has rules that ignore the devices LVM2 creates.
 127 .TP
 128 .B \-\-ignoremonitoring
 129 Make no attempt to interact with dmeventd unless \fB\-\-monitor\fP
 130 is specified.
 131 Do not use this if dmeventd is already monitoring a device.
 132 .TP
 133 .BR \-M ", " \-\-persistent " {" \fIy | \fIn }
 134 Set to y to make the minor number specified persistent.
 135 .TP
 136 .BR \-p ", " \-\-permission " {" \fIr | \fIrw }
 137 Change access permission to read-only or read/write.
 138 .TP
 139 .BR \-r ", " \-\-readahead " {" \fIReadAheadSectors | \fIauto | \fInone }
 140 Set read ahead sector count of this logical volume.
 141 For volume groups with metadata in lvm1 format, this must
 142 be a value between 2 and 120 sectors.
 143 The default value is "auto" which allows the kernel to choose
 144 a suitable value automatically.
 145 "None" is equivalent to specifying zero.
 146 .TP
 147 .B \-\-refresh
 148 If the logical volume is active, reload its metadata.
 149 This is not necessary in normal operation, but may be useful
 150 if something has gone wrong or if you're doing clustering
 151 manually without a clustered lock manager.
 152 .TP
 153 .BR \-Z ", " \-\-zero " {" \fIy | \fIn }
 154 Set zeroing mode for thin pool. Note: already provisioned blocks from pool
 155 in non-zero mode are not cleared in unwritten parts when setting zero to
 156 \fIy\fP.
 157 .SH Examples
 158 Changes the permission on volume lvol1 in volume group vg00 to be read-only:
 159 .sp
 160 .B lvchange -pr vg00/lvol1
 161 .SH SEE ALSO
 162 .BR lvm (8),
 163 .BR lvcreate (8),
 164 .BR vgchange (8)