From: John Jolet (john.jolet@FXFN.COM)
Date: Mon Nov 10 2003 - 15:29:30 EST
yeah. That was one of the issues i saw with sysback. no multi-volume backup option. i'm currently writing something in-house to manage the tape retentions, slot location, etc in the library. Doing it in perl with a mysql backend db. Using dd, which i'll wrap in tar, to do the multi-volume handling.
-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU]On Behalf Of
Bill Verzal
Sent: Monday, November 10, 2003 2:07 PM
To: aix-l@Princeton.EDU
Subject: Re: Advice on LTO tape storage
I'm using Sysback, and I don't see an "-M" option for tar.
Are you using "gnu" tar ?
BV
--------------------------------------------------------
"If everything is coming your way, then you are in the wrong lane"
Bill Verzal
AIX Administrator, Komatsu America
(847) 970-3726 - direct
(847) 970-4184 - fax
John Jolet
<john.jolet@FXFN. To: aix-l@Princeton.EDU
COM> cc:
Sent by: IBM AIX Subject: Re: Advice on LTO tape storage
Discussion List
<aix-l@Princeton.
EDU>
11/10/2003 01:54
PM
Please respond to
IBM AIX
Discussion List
what are you using to write to the tape? if you're using tar, use -M now.
-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU]On Behalf Of
Bill Verzal
Sent: Monday, November 10, 2003 1:37 PM
To: aix-l@Princeton.EDU
Subject: Advice on LTO tape storage
Hi *,
Got a question for ya related to LTO tape storage.
Currently, I have an LTO library (100 GB native, 200GB compressed). We do
our own tape management via a small 100 byte header on each tape. This
allows us to control tape retention.
If the tape runs to EOT during a backup, the library will eject the tape
and put the next one in. The backup will then continue and in this case,
will overwrite our header.
Currently, I limit myself to what amounts to about 145GB of data per tape.
I am concerned about how close to the end of the tape I am.
I back up a set amount of filesystems, eject the tape, then process the
remaining filesystems.
At what point should I stop "risking" the EOT condition and re-distribute
my offloads to more tapes, thereby allowing more data per tape and more
growth into the future ? Should I just stop risking it now and just make
the change ?
Thanks, Bill.
--------------------------------------------------------
"If everything is coming your way, then you are in the wrong lane"
Bill Verzal
AIX Administrator, Komatsu America
(847) 970-3726 - direct
(847) 970-4184 - fax
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