HP DDS/DAT drives UNIX, Linux and OpenVMS configuration guide (DW049-90915, November 2009)

Verifying the installation38

NOTE: Make sure you prefix the file name with ‘.’ when you back it up to tape. If you do not, the

restore operation in step 3 will overwrite the original copy on disk.

3. Read the file back from tape:

% cd /tmp

% tar xvf <archive name>

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

Use the same value for the

<archive name> argument as in step 2.

4. Compare the original with this retrieved file:

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

This step compares the retrieved file and the original file byte by byte. If they are the same, there

should be no output, and this verifies that the installation is correct. The arguments are as

follows:

Example

Suppose you are verifying the installation of an HP DDS-format tape drive on a Linux system. The

procedure would be as follows. See “System-Specific Arguments” below for the choice of

<archive

name>

and <file> arguments:

1. Change directory to root:

% cd /

2. Back up /boot/vmlinuz to tape:

% tar cvf /dev/st0 ./boot/vmlinuz

Note the prefix of ‘.’ to the filename.

3. Change to the temporary directory:

% cd /tmp

4. Extract the file from the tape:

% tar xvf /dev/st0

5. Compare the original with the restored version:

% cmp /boot/vmlinuz /tmp/boot/vmlinuz

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

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

Example:

/boot/vmlinuz

The name of the file retrieved from the archive.

Example:

boot/vmlinuz