We're using 256K buffer size and 512 buffers. We use Maxell brand tapes.
How long was it before you started to have problems due to tape head wear?
We only use tapes for off-site vaulting of backups. We initially write to
disk, then duplicate to tape. What I think helps us most is that we are
10G ethernet front to back, and have a dedicated 10G VLAN for backup
traffic between the media servers and DataDomain and multiple connections
between them.
--
Jack Forester, Jr.
Sr. Data Protection Administrator
Global Technology Services - AHS
Mylan, Inc.
5005 Greenbag Road
Morgantown, WV 26501
jack.forester AT mylan DOT com
Phone: +1.304.554.6039
Cell: +1.412.805.5313
From: "David McMullin" <David.McMullin AT CBC-Companies DOT com>
To: "veritas-bu AT mailman.eng.auburn DOT edu"
<veritas-bu AT mailman.eng.auburn DOT edu>
Date: 12/05/2011 09:25 AM
Subject: Re: [Veritas-bu] Robot inquiry/poll/how well does your robot/s
work?
Sent by: veritas-bu-bounces AT mailman.eng.auburn DOT edu
Jack - what size buffer parameters are you using with your LTO-5?
We have had to replace virtually ALL our LTO-5 drives due to tape head wear
- what brand of tapes do you use?
Agree regarding performance, in fact the limiting factor is more often
non-drive, i.e. hba, or source system just can't send data fast enough.
------------------------------
Message: 4
Date: Fri, 2 Dec 2011 14:35:59 -0500
From: Jack.Forester AT mylan DOT com
Subject: Re: [Veritas-bu] Robot inquiry/poll/how well does your robot/s
work?
To: "Justin Piszcz" <jpiszcz AT lucidpixels DOT com>
Cc: veritas-bu AT mailman.eng.auburn DOT edu, "'Lightner, Jeff'"
<JLightner AT water DOT com>,
veritas-bu-bounces AT mailman.eng.auburn DOT edu
Message-ID:
<OF91026D3A.B0A62E8A-ON8525795A.0069C55A-8525795A.006BAA7C AT myl DOT com>
Content-Type: text/plain; charset=iso-8859-1
I've used mostly the big library iron:
... removed for space...
Extending this discussion, what about tape drives?
We've just started using IBM LTO-5 drives earlier this year and have been
blown away with their performance and capacity. Haven't had to replace any
yet.
Our LTO-3 drives have been solid performers regardless of manufacturer.
STK T9940A/B. Nice, reliable enterprise class drives. Didn't require us
to buy new tapes when moving from the A to B series.
STK T10000 - Bought some of these at a former employer, but left before
they could be installed. Heard they were great drives.
DLT/SDLT - Meh.
--
Jack Forester, Jr.
Sr. Data Protection Administrator
Global Technology Services - AHS
Mylan, Inc.
5005?Greenbag?Road
Morgantown,?WV?26501
jack.forester AT mylan DOT com
Phone: +1.304.554.6039
Cell: +1.412.805.5313
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