Problems restoring from tape backup...

batcountry · 07-29-2014, 09:26 AM

Quote:

Originally Posted by szboardstretcher

Here is a test I JUST ran successfully on my tape array:

Code:

# Load a tape and rewind
mtx -f /dev/changer status
mtx -f /dev/changer load 0 1
mt -f /dev/st0 rewind

# Tar and compress a text file to the tape
tar -czvf /dev/st0 /root/testing1.txt

# Look at the contents of the tape
tar tvf /dev/st0

# Restore the file from the tape
mkdir /tmp/restore && cd /tmp/restore
tar -xzvf /dev/st0 root/testing1.txt

What I am concerned about is that you cannot list the contents of the tape. Once we have that part nailed down, restoration is simple. If listing has worked, please provide the list contents.

yeah, it's looking like I can't list the contents of the tape. Just now I;

1. rewound the tape
2. created a test file (/root/test.txt)
3. tar and compress file to tape, which gave the output:

Code:

tar: Removing leading `/' from member names
/root/test.txt

4. tried to look at the contents of the tape as you suggested, which gave no output

Thanks again for all your replies, it's very much appreciated!

batcountry · 07-30-2014, 05:13 AM

Another update...

Tried to list the contents of another tape on the same server and it appeared to work, although I should test the restore to be sure. Also not sure why it would be called 'config' (although that name is specified in the backup script);

Code:

[root@batcountry ~]# tar -b 128 -tvf /dev/nst0
-rw-r--r-- root/root 57188510653 2014-07-22 21:28:28 config.tar.gz

I tried the same command on the tape I actually want to restore from and get;

Code:

[root@batcountry ~]# tar -b 128 -tvf /dev/nst0
tar: Record size = 20 blocks
tar: This does not look like a tar archive
tar: Skipping to next header
tar: Error exit delayed from previous errors

rknichols · 07-30-2014, 08:42 AM

Try this to see what is on the tape:

Code:

dd if=/dev/st0 bs=64k count=1 | file -k -