How to Create a UFS Snapshot

1. Become superuser.

2. Make sure there is enough disk space for the backing-store file.

   # df -k

3. Make sure that a backing-store file of the same name and location does not already exist.

   # ls /file-system/backing-store-file

4. Create the file-system snapshot.

   # fssnap -F ufs -o bs=/file-system/backing-store-file /file-system

Examples--Creating a UFS Snapshot

The following example creates a snapshot of the /usr file system. The backing-store file is /scratch/usr.back.file, and the virtual device is /dev/fssnap/1.

# fssnap -F ufs -o bs=/scratch/usr.back.file /usr
/dev/fssnap/1

The following example limits the backing-store file to 500 Mbytes.

# fssnap -F ufs -o maxsize=500m,bs=/scratch/usr.back.file /export/home 
/dev/fssnap/1