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If you have two tapes drives and the tapes are not Multiplexed you could
probably get away with using Solaris dd to copy the tape.
Karl
"Ellwood, MW (Mike) " <M.W.Ellwood AT rl.ac DOT uk>
Sent by: veritas-bu-admin AT mailman.eng.auburn DOT edu
02/10/2004 01:44 PM
To
veritas-bu AT mailman.eng.auburn DOT edu
cc
Subject
[Veritas-bu] Keeping monthly/yearly "archives" of backups
In a previous non-Netbackup world, running on slightly older technology
(DLTs),
I used to hoik tapes out of my then simple backup system and keep them in
a
separate
safe, every so often (e.g. once a month plus once a year) as a long-term
"archive"*backup,
on the "you never know when you will need it" principle.
(*not quite used in the Netbackup sense, I believe).
In the Netbackup world, on LTO technology, where I have multiple backup
images per tape,
this is slightly more complex.
Clearly, it's easy to select the backups images I want to keep, and extend
them to infinity (or whatever),
but that obviously takes a whole tape out of my system, and they don't
come
cheap these days,
and it seems a shame to lose all that tape capacity for the sake of one
image.
What would be nice would be if I could copy off these selected images to a
separate archive tape or series
of tapes.
I know that bpduplicate can do this, but we already take a copy to protect
against bad tapes or
accidents, and Netbackup doesn't allow me to take another (3rd) copy (at
least not in 3.4).
(or strictly speaking, only allows one primary and one secondary copy, I
believe).
Now, I could extend my existing 2nd copy for "archive", instead of my
original, but I am still left with the problem
of only having one wanted backup on one tape, with the consequent waste of
capacity.
I suppose that once Netbackup expired my original primary, I could define
my
copy as the primary
and then take a new secondary copy (to my "archive" series of tapes).
(I _think_ you can set separate expiry dates for primary and secondary,
though I don't
quite remember the mechanism).
How would others approach this sort of problem?
With thanks,
Regards,
Mike Ellwood
_______________________________________________
Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
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<br><font size=3>If you have two tapes drives and the tapes are not Multiplexed
you could probably get away with using Solaris dd to copy the tape.</font>
<br>
<br><font size=3>Karl</font>
<br>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td width=40%><font size=1 face="sans-serif"><b>"Ellwood, MW (Mike)
" <M.W.Ellwood AT rl.ac DOT uk></b> </font>
<br><font size=1 face="sans-serif">Sent by: veritas-bu-admin AT
mailman.eng.auburn DOT edu</font>
<p><font size=1 face="sans-serif">02/10/2004 01:44 PM</font>
<td width=59%>
<table width=100%>
<tr>
<td>
<div align=right><font size=1 face="sans-serif">To</font></div>
<td valign=top><font size=1 face="sans-serif">veritas-bu AT mailman.eng.auburn
DOT edu</font>
<tr>
<td>
<div align=right><font size=1 face="sans-serif">cc</font></div>
<td valign=top>
<tr>
<td>
<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td valign=top><font size=1 face="sans-serif">[Veritas-bu] Keeping
monthly/yearly
"archives" of backups</font></table>
<br>
<table>
<tr valign=top>
<td>
<td></table>
<br></table>
<br>
<br>
<br><font size=2><tt>In a previous non-Netbackup world, running on slightly
older technology<br>
(DLTs), <br>
I used to hoik tapes out of my then simple backup system and keep them
in a<br>
separate <br>
safe, every so often (e.g. once a month plus once a year) as a long-term<br>
"archive"*backup,<br>
on the "you never know when you will need it" principle.<br>
<br>
(*not quite used in the Netbackup sense, I believe).<br>
<br>
In the Netbackup world, on LTO technology, where I have multiple backup<br>
images per tape,<br>
this is slightly more complex.<br>
<br>
Clearly, it's easy to select the backups images I want to keep, and extend<br>
them to infinity (or whatever),<br>
but that obviously takes a whole tape out of my system, and they don't
come<br>
cheap these days,<br>
and it seems a shame to lose all that tape capacity for the sake of one<br>
image.<br>
<br>
What would be nice would be if I could copy off these selected images to
a<br>
separate archive tape or series<br>
of tapes.<br>
<br>
I know that bpduplicate can do this, but we already take a copy to protect<br>
against bad tapes or<br>
accidents, and Netbackup doesn't allow me to take another (3rd) copy (at<br>
least not in 3.4).<br>
(or strictly speaking, only allows one primary and one secondary copy,
I<br>
believe).<br>
<br>
Now, I could extend my existing 2nd copy for "archive", instead
of my<br>
original, but I am still left with the problem<br>
of only having one wanted backup on one tape, with the consequent waste
of<br>
capacity.<br>
<br>
I suppose that once Netbackup expired my original primary, I could define
my<br>
copy as the primary<br>
and then take a new secondary copy (to my "archive" series of
tapes).<br>
(I _think_ you can set separate expiry dates for primary and secondary,<br>
though I don't<br>
quite remember the mechanism).<br>
<br>
How would others approach this sort of problem?<br>
<br>
With thanks,<br>
Regards,<br>
Mike Ellwood<br>
<br>
_______________________________________________<br>
Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu<br>
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu<br>
<br>
</tt></font>
<br>
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