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vgcreate(8) System Manager's Manual vgcreate(8) NAME vgcreate - Creates a volume group SYNOPSIS /usr/sbin/vgcreate [-x Extensibility] [-e MaxPhysicalExtents] [-l Max- LogicalVolumes] [-p MaxPhysicalVolumes] [-s PhysicalExtentSize] [-v VGDA] VolumeGroupName PhysicalVolumePath ... DESCRIPTION This command is no longer supported on Digital UNIX systems. Features formerly provided by the Logical Volume Manager (LVM) are now provided by the Logical Storage Manager (LSM). Existing LVM volumes must be mi- grated to LSM, using an encapsulation process. For information about moving LVM volumes to LSM, see the vollvmencap(8) reference page and the manual Logical Storage Manager. The vgcreate command creates a new volume group. VolumeGroupName is a symbolic name for the volume group and must be used by all references to it. VolumeGroupName is the path to a directory-entry under /dev which must contain a character special file named group. Except for the group entry, the directory Vol- umeGroupName should not contain any other entries. The vgcreate command leaves the volume group in an active state. Before assigning a physical volume to a volume group, the physical vol- ume has to be created with the pvcreate command. If vgcreate fails to install the first specified physical volume into the volume group, the volume group is not created. If, for any reason, one of the remaining specified physical volumes cannot be installed into the volume group, an error message is printed, but the installa- tion continues to the end of the list of physical volumes. FLAGS Sets the allocation permission for adding physical extents on the phys- ical volumes specified by the PhysicalVolumePath parameter. The Exten- sibility parameter is represented by one of the following: Allows the allocation of additional physical extents on the physical volume. (The default.) Prohibits the allocation of additional physical extents on the physical volume. The logical volumes that reside on the physical volume can still be accessed, after the volume group has been activated with the vgchange -a y command. Sets the maximum number of physical extents that can be allocated from any of the physical volumes in the volume group. The default is 1016. Sets the maximum number of logical volumes that the volume group is allowed to contain. The default is 255. Sets the maximum number of physical volumes that the volume group is allowed to contain. The default is 32. Sets the number of megabytes in each physical extent, where PhysicalExtentSize is ex- pressed in units of megabytes from 1 through 256. PhysicalExtentSize must be equal to a power of 2 (for example, 1, 2, 4, 8). The default is 1 megabyte. This option allows you to specify if a VGDA (Volume Group Descriptor Area) of the volume group has to be stored on the physical volume(s). A VGDA is always stored on the first physical vol- ume specified. This flag impacts only the second, third, and so on, physical volumes specified. VGDA is represented by one of the follow- ing: Allows the creation of a VGDA on the physical volume. (The de- fault.) Prohibits the creation of a VGDA on the physical volume. EXAMPLES This section contains Digital device-specific examples. To create a volume group named /dev/my_vg that contains three physical volumes, with extent size set to 2 megabytes, enter: vgcreate -s 2 /dev/my_vg /dev/rz3c /dev/rz5c /dev/rz6c If the directory /dev/my_vg exists with the character special file group, the volume group will be created. To create a volume group named /dev/user_vg that can contain a maximum of three logical volumes, with extent size set to 8 megabytes, enter: vgcreate -l 3 -s 8 /dev/user_vg /dev/rz3c A new volume group, /dev/user_vg is created with extent size equal to 8 megabytes. FILES Specifies the command path RELATED INFORMATION Commands: pvcreate(8), vgchange(8), vgdisplay(8), vgextend(8), vgre- duce(8) delim off vgcreate(8)