ADSM-L

Re: [ADSM-L] LTO1/LTO2 to LTO4 migration?

2008-01-09 11:21:44
Subject: Re: [ADSM-L] LTO1/LTO2 to LTO4 migration?
From: "Bell, Charles (Chip)" <Chip.Bell AT BHSALA DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Wed, 9 Jan 2008 10:21:01 -0600
Yep. Thanks!

We're going to migrate when time comes, not "rip out and replace". <shudders>

Thanks again!

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Wanda Prather
Sent: Wednesday, January 09, 2008 10:13 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] LTO1/LTO2 to LTO4 migration?

Been there done that lots of times.  But the answer depends on what you
mean.

If you have both LTO1/LTO2 and LTO4 drives in the same physical library, the
LTO4 drives will be in a different device class, different logical library,
differen storage pools.  You can run MOVE DATA, MOVE NODEDATA, or a MIGRATE
command (assuming you are at least TSM 5.3) to move your data from the old
tapes to the new ones.

If you are talking about replacing your LTO1/2 drives with new drives, so
that you only have the new drives in the library, here's the deal:

LTO drives can write one generation back, read 2 generations back.

SO,
an LTO3 drive can read an LTO1 cartridges, and read/write an LTO2 cartridge.
an LTO4 drive can only read LTO2 cartrdiges
an LTO1 drive can't do anything with an LTO1 cartridge

So for example, if you had your CE pull out LTO1 drives and replace them
with LTO3, you would mar your LTO1 cartrdiges as READONLY, and run MOVE DATA
(or MIGRATE) to get the data onto LTO3 cartridiges.
You can do the same with the LTO2 cartridges, or continue using them
read/write with the LTO3 drives (but you don't get the capacity increase).

Does any of that answer your questions?


On 1/9/08, Bell, Charles (Chip) <Chip.Bell AT bhsala DOT com> wrote:

> Is it possible to run 'move data' or 'move nodedata' commands from either
> LTO1 or LTO2 device class to LTO4? What about from LTO1/2 to LTO3? Has
> anyone
> done this?
>
>
>
> God bless you!!!
>
> Chip Bell
> Network Engineer I
> IBM Tivoli Certified Deployment Professional
>
> Baptist Health System
> Birmingham, AL
>
>
>
>
>
>
>
>
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