The real speed difference in LTO was in the LTO3 to LTO4 jump. LTO4 will be
significantly faster than LTO3 -- On Tape.
In a VTL I can't imagine much of a difference. On my SPHiNX I tried a save
to an LTO3 virtual device, then the same save to an LTO5. The time
difference was negligible (I think you're correct it's the speed of the VTL
and the communications that count, in my case Fibre) but the file sizes
caught me off guard. The LTO3 was noticeably larger than the LTO5. I'm
guessing that's the difference in the formatting of the LTO version showing
up there.
So, no I did not see a significant difference in speed.
--
Jim Oberholtzer
Agile Technology Architects
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Rob
Berendt
Sent: Friday, January 20, 2017 3:49 PM
To: Midrange Systems Technical Discussion
Subject: Re: Virtual tape - Performance difference between LTO 3 & LTO5
Been awhile but I don't recall speed being the issue between LTO4 and LTO5
on the same VTL.
We just changed when we got rid of our LTO4 media library and wanted size
consistency as I have an LTO5 to install one of these days. Since we have
no crying need for physical tapes it is so on the back burner.
Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1 Group Dekko Dept 1600 Mail
to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com
From: Charles Wilt <charles.wilt@xxxxxxxxx>
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Date: 01/20/2017 04:23 PM
Subject: Virtual tape - Performance difference between LTO 3 & LTO5
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>
Question came up on serverfault...
I don't believe there's any performance difference between virtual LTO3 &
LTO5. I suspect both perform as fast as the disk subsystem allows.
Can anyone confirm or correct me?
Thanks!
Charles
midrange.com
