HP Veritas Volume Manager 5.0 -UX 11i v3 Creating a volume set, Adding a volume to a volume set

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Creating and administering volume sets

Creating a volume set

■Volume sets can be used in place of volumes with the following vxsnap operations on instant snapshots: addmir, dis, make, prepare, reattach, refresh, restore, rmmir, split, syncpause, syncresume, syncstart, syncstop, syncwait, and unprepare. The third-mirrorbreak-off usage model for full-sized instant snapshots is supported for volume sets provided that sufficient plexes exist for each volume in the volume set. See “Administering volume snapshots” on page 303 and “Creating instant snapshots of volume sets” on page 334 for more information.

■A full-sized snapshot of a volume set must itself be a volume set with the same number of volumes and the same volume index numbers as the parent. The corresponding volumes in the parent and snapshot volume sets are also subject to the same restrictions as apply between standalone volumes and their snapshots.

Creating a volume set

To create a volume set for use by Veritas File System (VxFS), use the following command:

#vxvset [-g diskgroup] -t vxfs make volset volume

Here volset is the name of the volume set, and volume is the name of the first volume in the volume set. The -toption defines the content handler subdirectory for the application that is to be used with the volume. This subdirectory contains utilities that an application uses to operate on the volume set. As the operation of these utilities is determined by the requirements of the application and not by VxVM, it is not discussed further here.

For example, to create a volume set named myvset that contains the volume vol1, in the disk group mydg, you would use the following command:

#vxvset -g mydg -t vxfs make myvset vol1

Adding a volume to a volume set

Having created a volume set containing a single volume, you can use the following command to add further volumes to the volume set:

#vxvset [-g diskgroup] [-f] addvol volset volume

For example, to add the volume vol2, to the volume set myvset, use the following command:

# vxvset -g mydg addvol myvset vol2