How to verify data on DAT tape?

Solution Verified - Updated -

Environment

Red Hat Enterprise Linux 5

Issue

I have been backing up html files contains /dev/sdb1 on DAT tape using dump. How to verify data on DAT tape?

Resolution

Please use C option for restore command as follows,


restore -Cf /dev/nst0

Root Cause

This mode allows comparison of files from a dump. Restore reads  the backup and compares its contents with files present on the disk. It  first changes its working directory to the root of the filesystem that  was dumped and compares the tape with the files in its new current  directory.

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