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Ci-dessous, les différences entre deux révisions de la page.

--- man_de_lvreduce [2015/12/26 16:59] – créée simon
+++ man_de_lvreduce [2026/08/23 07:51] (Version actuelle) – supprimée - modification externe (Date inconnue) 127.0.0.1
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-==== Manuel de la commande "lvreduce" ====
-<code>LVREDUCE(8)                                              System Manager's Manual                                             LVREDUCE(8)
-NAME
-       lvreduce — reduce the size of a logical volume
-SYNOPSIS
-       lvreduce  [-A|--autobackup  {y|n}] [--commandprofile ProfileName] [-d|--debug] [-h|--help] [-t|--test] [-v|--verbose] [--version]
-       [-f|--force]  [--noudevsync]   {-l|--extents   [-]LogicalExtentsNumber[%{VG|LV|FREE|ORIGIN}]   |   [-L|--size   [-]LogicalVolume‐
-       Size[bBsSkKmMgGtTpPeE]} [-n|--nofsck] [-r|--resizefs] LogicalVolume{Name|Path}
-DESCRIPTION
-       lvreduce  allows  you  to reduce the size of a logical volume.  Be careful when reducing a logical volume's size, because data in
-       the reduced part is lost!!!
-       You should therefore ensure that any filesystem on the volume is resized before running lvreduce so that the extents that are  to
-       be removed are not in use.
-       Shrinking snapshot logical volumes (see lvcreate(8) for information to create snapshots) is supported as well.  But to change the
-       number of copies in a mirrored logical volume use lvconvert(8).
-       Sizes will be rounded if necessary - for example, the volume size must be an exact number of extents and the size  of  a  striped
-       segment must be a multiple of the number of stripes.
-OPTIONS
-       See lvm(8) for common options.
-       -f, --force
-              Force size reduction without prompting even when it may cause data loss.
-       -l, --extents [-]LogicalExtentsNumber[%{VG|LV|FREE|ORIGIN}]
-              Reduce  or set the logical volume size in units of logical extents.  With the - sign the value will be subtracted from the
-              logical volume's actual size and without it the value will be taken as an absolute size.  The  total  number  of  physical
-              extents  freed  will  be  greater than this logical value if, for example, the volume is mirrored.  The number can also be
-              expressed as a percentage of the total space in the Volume Group with the suffix %VG, relative to the existing size of the
-              Logical Volume with the suffix %LV, as a percentage of the remaining free space in the Volume Group with the suffix %FREE,
-              or (for a snapshot) as a percentage of the total space in the Origin Logical Volume with the suffix %ORIGIN.  The  result‐
-              ing  value for the subtraction is rounded downward, for the absolute size it is rounded upward.  N.B. In a future release,
-              when expressed as a percentage with VG or FREE, the number will be treated as an  approximate  total  number  of  physical
-              extents  to be freed (including extents used by any mirrors, for example).  The code may currently release more space than
-              you might otherwise expect.
-       -L, --size [-]LogicalVolumeSize[bBsSkKmMgGtTpPeE]
-              Reduce or set the logical volume size in units of megabytes.  A size suffix of k for kilobyte, m for megabyte, g for giga‐
-              bytes,  t for terabytes, p for petabytes or e for exabytes is optional.  With the - sign the value will be subtracted from
-              the logical volume's actual size and without it it will be taken as an absolute size.
-       -n, --nofsck
-              Do not perform fsck before resizing filesystem when filesystem requires it. You may need to use --force  to  proceed  with
-              this option.
-       --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.
-       -r, --resizefs
-              Resize underlying filesystem together with the logical volume using fsadm(8).
-Examples
-       Reduce the size of logical volume lvol1 in volume group vg00 by 3 logical extents:
-       lvreduce -l -3 vg00/lvol1
-SEE ALSO
-       fsadm(8), lvchange(8), lvconvert(8), lvcreate(8), lvextend(8), lvm(8), lvresize(8), vgreduce(8)
-Sistina Software UK                                LVM TOOLS 2.02.111(2) (2014-09-01)                                        LVREDUCE(8)
-</code>