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You are going to need mt to control the tape drive, and I
recommend mtx to control your library if you are using one. (I'm not going to
cover mtx here.) Both are available via yum for Linux. At one point I
had this working on an old Solaris 2.6(?) server running NBU 4.5 but I didn't
document the procedure then so there might be subtle differences. This was
recently tested on a CentOS 5.3 Linux server with a Quantum M1500 library with
SDLT220 media. I'm having to import hundreds of old media and we're using this
to read images that don't complete the catalog import successfully. Just
a quick disclaimer, I haven't tested this completely. For example, if
you are writing a large file and you get to the end of the media, I'm assuming
Netbackup continues that file on the next media but I'm not certain that this
procedure would recover that file in its original format. Also, there is the
mangled file issue (covered below.)
Substitute /dev/nst0 for whatever your tape device
is.
Use mtx or manually load the media
mt ?f
/dev/nst0 rewind (rewind the
media)
mt ?f /dev/nst0 fsr 1
(fast forward to the media
header)
mt ?f /dev/nst0 fsf (move
one block past the tape header, tar will error if you try to read the media
header)
/usr/openv/netbackup/bin/tar ?xvf /dev/nst0 (Extract data in this image / might want to redirect
output to suitable location)
mt ?f /dev/nst0 fsr 1 (fast forward to the next
image)
/usr/openv/netbackup/bin/tar ?xvf /dev/nst0 (extract the data)
Keep repeating the mt
-f fsr1 and tar commands until you get an error about being at the end of the
media.
mt ?f
/dev/nst0 rewind (rewind the
media)
Use mtx or manually unload the
media
After restoring an image you may files with the
following filename pattern: @@MaNgLeD.#### . These files are files that
we're backed up with paths longer than 100 characters. Normally, you
should also get a @@MaNgLeD.####_rename file that tells you where the
@@MaNgLeD.#### file came from and what it should be named to but we've found
numerous instances where the @@MaNgLeD.####_rename file isn't recovered.
Symantec Tech Support suggested that some versions of Netbackup may have
appended the path name to the file itself, but we haven't found this to be the
case. They have also suggested that this could be a sign of a corrupt tar
image. The nature of my current project is such that I need the file data most /
original name and location are not mission critical and since Symantec has
already given this to backline support and that's all they've got on the
subject, I don't know that we're going to look into this much
further.
Finally, credit where credit is due, two guys on our team
here spent more time battling bad media, stuck tapes and Symantec tech support
to figure this out than I did and their names are Tim and
JR.
-Jonathan
Jonathan,
Please send the procedures to the list
so that I might have them, too.
THANKS,
Rocky Grasso
On
8/26/09 11:34 PM, "Martin, Jonathan" <JMARTI05 AT intersil DOT com>
wrote:
Netbackup can read BackupExec Media but I don't think
it works the other way around. Further, you are sending data from a
recent version of Netbackup to a site running a 4+ year old version of
BackupExec. If you've got a Unix/Linux server I've got some procedures you can
use to read the data native off the media. If not you are going to have
to install Netbackup.
-Jonathan
-----Original
Message-----
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu]
On Behalf Of Justin Piszcz
Sent: Wednesday, August 26, 2009 5:20 PM
To:
Jorge Fábregas
Cc: VERITAS-BU AT mailman.eng.auburn DOT edu
Subject:
Re: [Veritas-bu] Can Backup Exec read Netbackup?
On Wed, 26 Aug
2009, Jorge Fábregas wrote:
> Hello everyone,
>
> We
need to send some LTO-1 tapes (created with Netbackup 6.5) to
> another
division that has "Backup Exec 9.1" along with LTO-1 drives.
> Will they
be able to import the media? Any document with a compability
chart?
>
> Thanks!
>
> Best regards,
>
Jorge
> _______________________________________________
>
Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
>
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
>
Correct
me if I'm wrong-- but as far as I know NetBackup can read Backup Exec tapes
but not vice
versa.
Justin.
_______________________________________________
Veritas-bu
maillist - Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
_______________________________________________
Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
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