Veritas Storage Foundation 5.1 SP1 Cluster File System Administrator"s Guide (5900-1738, April 2011)

Creating a snapshot on a Storage Foundation Cluster File

System

To create and mount a snapshot on a two-node cluster using SFCFS administrative

interface commands.

To create a snapshot on a cluster file system

To create a VxFS file system on a shared VxVM volume, type the following

command:

# mkfs -F vxfs /dev/vx/rdsk/cfsdg/vol1

version 7 layout

15728640 sectors, 15728640 blocks of size 1024, log size 16384 blocks

largefiles supported

To mount the file system on all nodes, type the following commands:

# cfsmntadm add cfsdg vol1 /mnt1 all=cluster

# cfsmount /mnt1

The cfsmntadm command adds an entry to the cluster manager configuration,

then the cfsmount command mounts the file system on all nodes.

Add the snapshot on a previously created volume (snapvol in this example)

to the cluster manager configuration. For example:

# cfsmntadm add snapshot cfsdg snapvol /mnt1 /mnt1snap system01=ro

The snapshot of a cluster file system is accessible only on the node where it

is created; the snapshot file system itself cannot be cluster mounted.

Create and locally mount the snapshot file system on system01, type the

following command:

# cfsmount /mnt1snap

A snapped file system cannot be unmounted until all of its snapshots are

unmounted. Unmount and destroy the snapshot before trying to unmount

the snapped cluster file system, type the following command:

# cfsumount /mnt1snap

63Administering Storage Foundation Cluster File System and its components

Administering CFS