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author | David Teigland <teigland@redhat.com> | 2015-12-02 10:37:25 -0600 |
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committer | David Teigland <teigland@redhat.com> | 2015-12-02 10:37:25 -0600 |
commit | 3bbf89e9ec92388cbfa722c0fbb6ff3fad0232aa (patch) | |
tree | 24ba29d4039f7a2df3947b9613d6cf0ab4edc460 | |
parent | 61573bd1972702f1066c3df5543acc47e9e35da8 (diff) | |
download | lvm2-3bbf89e9ec92388cbfa722c0fbb6ff3fad0232aa.tar.gz |
man lvm: add section about unique VG names
-rw-r--r-- | man/lvm.8.in | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/man/lvm.8.in b/man/lvm.8.in index 31f7187a4..4e9e1dd5e 100644 --- a/man/lvm.8.in +++ b/man/lvm.8.in @@ -502,6 +502,28 @@ amendment when the software is updated. Should you need to process the node names in /dev/mapper, you may use \fBdmsetup splitname\fP to separate out the original VG, LV and internal layer names. . +.SH UNIQUE NAMES +. + +VG names should be unique. vgcreate will produce an error if the +specified VG name matches an existing VG name. However, there are cases +where different VGs with the same name can appear to LVM, e.g. after +moving disks or changing filters. + +When VGs with the same name exist, commands operating on all VGs will +include all of the VGs with the same name. If the ambiguous VG name is +specified on the command line, the command will produce an error. The +error states that multiple VGs exist with the specified name. To process +one of the VGs specifically, the --select option should be used with the +UUID of the intended VG: '--select vg_uuid=<uuid>'. + +An exception is if all but one of the VGs with the shared name is foreign +(see +.BR lvmsystemid (7).) +In this case, the one VG that is not foreign is assumed to be the intended +VG and is processed. + +. .SH ALLOCATION . When an operation needs to allocate Physical Extents for one or more |