How to Determine the Number of Tapes Needed for a Full Backup

Steps

1. Become superuser or assume an equivalent role.

2. Estimate the size of the backup in bytes.

   # ufsdump S file-system

   The S option displays the estimated number of bytes that are needed to do the backup.

3. Divide the estimated size by the capacity of the tape to see how many tapes you need.

   For a list of tape capacities, see Table 22–5.

Example 23–2 Determining Number of Tapes

In this example, the file system of 489,472 bytes easily fits on a 150-Mbyte tape.

# ufsdump S /export/home
489472