HP LTO Ultrium 6 tape drives UNIX, Linux and OpenVMS configuration guide

3. Read the file back from tape:

% cd /tmp

% tar xvf <device file>

The ‘x’ option to tar here means “extract from the archive”.

Use the same value for the <device file> argument as in step 2.

4. Compare the original with this retrieved file:

% cmp <original file> /tmp/<retrieved file>

This compares the files byte by byte. If they are the same, there should be no output, and this

verifies that the installation is correct. The arguments are:

The name of the original file, prefixed with ‘/’.

Example:/stand/vmunix

The name of the file retrieved from the archive.

Example:stand/vmunix

Example

Suppose you are verifying the installation of an HP LTO Ultrium tape drive on an HP-UX 11.X

system. The procedure would be as follows:

1. Use ioscan to obtain the tape drive device file options:

%/sbin/ioscan -fnC tape

Identify the Berkeley ‘no-rewind’ option, for example: /dev/rmt/c4t3d0BESTnb

2. Change directory to root:

% cd /

3. Back up /stand/vmunix to tape:

% tar cvf /dev/rmt/c4t3d0BESTnb ./stand/vmunix

Note the prefix of ‘.’ to the filename.

4. Change to the temporary directory:

% cd /tmp

5. Extract the file from the tape:

% tar xvf /dev/rmt/c4t3d0BESTnb

6. Compare the original with the restored version:

% cmp /stand/vmunix /tmp/stand/vmunix

Note that the original filename is not prefixed with ‘.’.

26 Verifying the installation