1VGCREATE(8) System Manager's Manual VGCREATE(8)
2
6 vgcreate - create a volume group
7
9 vgcreate [--addtag Tag] [--alloc AllocationPolicy] [-A|--autobackup
10 {y|n}] [-c|--clustered {y|n}] [-d|--debug] [-h|--help] [-l|--maxlogi‐
11 calvolumes MaxLogicalVolumes] [-M|--metadatatypetype] [-p|--maxphysi‐
12 calvolumes MaxPhysicalVolumes] [-s|--physicalextentsize PhysicalExtent‐
13 Size[kKmMgGtT]] [-t|--test] [-v|--verbose] [--version] VolumeGroupName
14 PhysicalVolumePath [PhysicalVolumePath...]
15
17 vgcreate creates a new volume group called VolumeGroupName using the
18 block special device PhysicalVolumePath previously configured for LVM
19 with pvcreate(8).
20
22 See lvm for common options.
23 -c, --clustered {y|n}
25 If clustered locking is enabled, this indicates whether this
26 Volume Group is shared with other nodes in the cluster or
27 whether it contains only local disks that are not visible on the
28 other nodes. If the cluster infrastructure is unavailable on a
29 particular node at a particular time, you may still be able to
30 use Volume Groups that are not marked as clustered.
31 -l, --maxlogicalvolumes MaxLogicalVolumes
33 Sets the maximum number of logical volumes allowed in this vol‐
34 ume group. The setting can be changed with vgchange. For vol‐
35 ume groups with metadata in lvm1 format, the limit and default
36 value is 255. If the metadata uses lvm2 format, the default
37 value is 0 which removes this restriction: there is then no
38 limit.
39 -p, --maxphysicalvolumes MaxPhysicalVolumes
41 Sets the maximum number of physical volumes that can belong to
42 this volume group. The setting can be changed with vgchange.
43 For volume groups with metadata in lvm1 format, the limit and
44 default value is 255. If the metadata uses lvm2 format, the
45 default value is 0 which removes this restriction: there is then
46 no limit. If you have a large number of physical volumes in a
47 volume group with metadata in lvm2 format, for tool performance
48 reasons, you should consider some use of --metadatacopies 0 as
49 described in pvcreate(8).
50 -s, --physicalextentsize PhysicalExtentSize[kKmMgGtT]
52 Sets the physical extent size on physical volumes of this volume
53 group. A size suffix (k for kilobytes up to t for terabytes) is
54 optional, megabytes is the default if no suffix is present. The
55 default is 4 MB and it must be at least 1 KB and a power of 2.
56 Once this value has been set, it is difficult to change it with‐
58 out recreating the volume group which would involve backing up
59 and restoring data on any logical volumes. However, if no
60 extents need moving for the new value to apply, it can be
61 altered using vgchange -s.
62 If the volume group metadata uses lvm1 format, extents can vary
64 in size from 8KB to 16GB and there is a limit of 65534 extents
65 in each logical volume. The default of 4 MB leads to a maximum
66 logical volume size of around 256GB.
67 If the volume group metadata uses lvm2 format those restrictions
69 do not apply, but having a large number of extents will slow
70 down the tools but have no impact on I/O performance to the log‐
71 ical volume. The smallest PE is 1KB.
72 The 2.4 kernel has a limitation of 2TB per block device.
74
76 To create a volume group named test_vg using physical volumes
77 /dev/hdk1, and /dev/hdl1 with default physical extent size of 4MB:
78 vgcreate test_vg /dev/sdk1 /dev/sdl1
80
83 lvm(8), pvdisplay(8), pvcreate(8), vgdisplay(8), vgextend(8), vgre‐
84 duce(8), lvcreate(8), lvdisplay(8), lvextend(8), lvreduce(8)
85Sistina Software UK LVM TOOLS VGCREATE(8)