Re: Connecting a 3753 (TS3200 tape library) to 2 IBMi systems

Maybe the answer then is BRMS network. I have BRMS in use like you do but
have to dlpar the device between the lpars and as you explain each one is
in control of the volumes/drives etc. Maybe you could isolate it out with
the left side of the tape magazine for one system and the right side for
another, again not sure.

On Tue, Jul 10, 2012 at 8:31 AM, <rob@xxxxxxxxx> wrote:

Explain to me how that would work. For example, I have these tapes loaded
into the library: BR0001, BR0002, BR0003, BR0004, BR0005, BR0006, BR0007,
BR0008, BR0009, BR0010. I have 4 drives. I have 5 lpars: 1, 2, 3, 4, 5.
I've ran a STRBALBRM and spread out the media. So let's say lpar 1 has
BR0001, 2; 2 has 3+4, 3 has 5+6, 4 has 7+8 and lpar 5 has BR0009+BR0010.
Now I fire off 5 STRBKUBRM's at once. How does it write to BR0001,
BR0003, BR0005, BR0007, BR0009 all at once when it only has 4 drives? To
allow it to take turns writing by kicking tapes in and out would be
inefficient because there isn't enough lag time between writes to
accommodate kicking out the tape, bringing in a different one for the
different lpar, and vice versa. Am I looking into this wrong? Would BRMS
save multiple lpars onto one tape? Alternating sequence numbers? Wouldn't
one several hour IFS SAV be chopped up? If it's neither of those two
options how would it be done?


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: Jack Kingsley <iseriesflorida@xxxxxxxxx>
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>,
Date: 07/10/2012 08:17 AM
Subject: Re: Connecting a 3753 (TS3200 tape library) to 2 IBMi
systems
Sent by: midrange-l-bounces@xxxxxxxxxxxx



I could be wrong on this, not sure though.
If your using BRMS on each seperate system then I would think via the WWPN
setups on each server that you could write to it at the same time.
wrkmlbsts would show the media library as varied on with the the tape
drives from each seperate system showing operational.


On Tue, Jul 10, 2012 at 7:32 AM, <rob@xxxxxxxxx> wrote:

Tell you this, we currently have a 3576 with 6 fiber drives in it. 3

are

dedicated to 1 lpar of Linux running TSM. The other 3 are shared

between

4 lpars of i - each with their own fiber card. All attached to a

switch.

We don't have to vary on/off or anything else. We just have to ensure
that only 3 lpars of i try to access the library at once. BRMS keeps
track of which lpar used what tape and so on. You have to have the
networking feature configured for this.

I was hoping for an LTO5 upgrade but it looks like we will be going to a
LTO4 upgrade. Much cheaper and allows us to faze in tape cartridge
upgrades since LTO4 can both read and write LTO3 tapes. My boss is
chasing down the numbers but currently looking at replacing several SCSI
attached 3573 libraries with your configuration. Everything will be
connected through a switch. Our BP is getting us what we'll need. One

of

these people has his name on 9 redbooks.


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: "Graap, Kenneth" <Kenneth.Graap@xxxxxxxxxxxxx>
To: "Midrange Systems Technical Discussion

(midrange-l@xxxxxxxxxxxx)"

<midrange-l@xxxxxxxxxxxx>,
Date: 07/09/2012 06:14 PM
Subject: Connecting a 3753 (TS3200 tape library) to 2 IBMi

systems

Sent by: midrange-l-bounces@xxxxxxxxxxxx



I have a TS3200 LTO4 Tape Library (3573). It has dual tape drives in it

(a

4U configuration)

It looks like each Tape Drive has 2 fibre ports.

Currently one port for each Tape Drive is directly attached to a Power6
IBMi system using a couple 2844 IOP's and 280D Fibre controller cards
(Note: No fibre switch is being used)

I want to attach a second IBMi, a Power7 system, to the TS3200 via a
couple 5735 Fibre Channel Adaptor cards connected through a generic

Fibre

Switch.

My intent is to plug the 2nd fiber ports for each tape drive into the
fibre switch along with the 2 5735 interface cards with the hope that

the

Power7 system will be able to access the tape drives that way. I was

also

hoping that I could then toggle the tape drives between the two IBMi
systems.

Do you think this is possible? I haven't been able to find any
documentation describing this kind of configuration.

Reply or Forwarded mail from: Kenneth E Graap

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