You also have the issue of the tape drives
in this.
When you set up a tape drive as DLT, then
setup tapes as DLT then two match and netbackup will mount tapes in a drive that
match.
Now if you change your expired tapes to
hcart3, then none of the tapes will mount in less you also change some tape
drives to hcart3.
And you cannot change all the drives to
hcart3 because then you would not be able to do restores from the tapes that
still say DLT.
From:
veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Donaldson, Mark
Sent: Tuesday, May 05, 2009 4:32
PM
To: Marianne Van Den Berg;
VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
Subject: Re: [Veritas-bu] LTO4 recognized
as DLT
I think this is a
mistake.
Media type (hcart, dlt,
hcart2) etc is just a label - part of the media database. It exists
per tape regardless of the backups on it. Volume Pool is what's usually
assigned through backup creation. You can change the media type (via the
vmchange) command regardless of assignment status.
hcart, hcart2, etc. are
just labels. Netbackup matches the media type of an individual tape to the
storage unit type. It doesn't know that hcart2 is a superset of
hcart1. It doesn't know hcart2 is anything, really, other than a
label. To NB, hcart & hcart2 are as different as hcart & dlt -
they're different media types and are therefore different
tapes.
I know that I can
change the media type on an LTO1 tape from hcart to hcart2 and all of a sudden
Netbackup will start reading and writing that tape in the LTO2 drives (since
they're type is hcart2 in the storage unit definitions). Change it
back to hcart1 and it'll only be read & written in LTO1 drives. I have
to know that the two media types are backwards compatible and manage that
myself.
If you built an all new
system and started with LTO4 tapes and called them hcart type, you'd be
just fine as long as the media type on the storage units and the media types on
the tapes themselves match.
They should've called
it "type1" and "type3" rather than anything that implied a physical type - it'd
avoid this kind of confusion.
-M
From:
veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Marianne Van Den
Berg
Sent: Tuesday, May 05,
2009 2:07 PM
To:
VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
Subject: Re: [Veritas-bu] LTO4 recognized
as DLT
You should've changed media and drive type
before doing backups. You can change drive type and media type of unassigned
tapes, not once you've written backups to it. Throughput is determined by
physical capabilities, not drive type in NBU config.
-----Original
Message-----
From: sql_noob <netbackup-forum AT backupcentral DOT com>
Sent: 05 May 2009 21:48
To: VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU
<VERITAS-BU AT MAILMAN.ENG.AUBURN DOT EDU>
Subject: [Veritas-bu] LTO4 recognized as DLT
i just had the same
thing happen to me on NB 6.5.3. we're still in the testing stage of a new HP MSL
8096 and NB 6.5.3 running on a HP x86 server on Windows 2003.
the
compatibility list says the robot is type TLD and it recognized it as such. all
the tapes were recognized as DLT. we're getting very good perfomance, but long
term we might connect an old autoloader to this to import old DLT tapes and i'm
concerned this may be a problem.
should I delete the robot and set it up
again making sure it says HCART3? we're using LTO-4 drives and
tapes
+----------------------------------------------------------------------
|This
was sent by alent1234 AT gmail DOT com via
Backup Central.
|Forward SPAM to abuse AT backupcentral DOT com.
+----------------------------------------------------------------------
_______________________________________________
Veritas-bu
maillist - Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
This email has been
scanned for viruses and malware, and automatically archived by Mimecast SA (Pty)
Ltd, an innovator in Software as a Service (SaaS) for business. Mimecast Unified
Email Management ™ (UEM) offers email continuity,
security, archiving and compliance with all current legislation. To find out
more, contact StorTech.
stormcid