Re: LTO1 to LTO3

Your drives *are not* configured for Ultrium2C, your DevClass is.
Depending on the version of the server you are using you can create new
devclass over same library to differentiate media from various
generations.

Back to the question: you will not lose data if format is changed, it
actually applies when the volume is written for first time.
Example:
1. devclass was initially set to ULTRIUM2C and VOL001L2 is defined in a
stgpool. The volume will be written with compression.
2. you change the devclass format to ULTRIUM2 and VOL002L2 is defined in a
stgpool. VOL002L2 will use no compression , and VOL001L2 will still be
compressed.
3. you change again devclass to DRIVE and VOL003L2 is defined. VOL001L2
and VOL003L2 will be compressed, while VOL002L2 will not.

Zlatko Krastev
IT Consultant






"John E. Vincent" <adsm-l-alias AT clacorp DOT com>
Sent by: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
23.06.2005 02:13
Please respond to adsm-l-alias

        To:     ADSM-L AT VM.MARIST DOT EDU
        cc:     (bcc: ADSM-L/ACIT)
        Subject:        Re: [ADSM-L] LTO1 to LTO3


This actually brings up question. for me.

Our LTO2 drives are configured as ULTRIUM2C. Can we change the format to
DRIVE without data loss?

John E. Vincent

William Boyer wrote:
> I believe you need to be at TSM server 5.2.4.0 to support LTO-3. Check
the supported devices matrix to be sure.
>
>
> Bill Boyer
> "Some days you're the bug, some days you're the windshield" - ??
>
> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf 
> Of
David Longo
> Sent: Wednesday, June 22, 2005 1:43 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: LTO1 to LTO3
>
> I am about to replace a few of my LTO1 drives with LTO3.
> Have started looking at all this stuff.  You didn't mention the platform
for TSM server.  Mine is AIX and one other thing to do is
> make sure the Atape driver is updated for LTO3 and
> LTO3 WORM if you are using that, I will be.
>
> Whatever platform, there is probably some OS stuff to check on.
>
> David Longo
>
>
>>>>bjdboyer AT COMCAST DOT NET 06/22/05 1:24 PM >>>
>
> Since LTO3 can read LTO1 media, why not just:
>
> - In TSM, delete all your drives and paths
> - Remove them from your OS
> - Remove LTO-1 drives and replace with LTO-2 drives
> - Allow your OS to recognize the new drives
> - define the drives and paths to TSM
> - Mark all your LTO-1 tapes as READONLY and just feed the library with
LTO-3 media from now on.
>
> Since the devclass devtype is LTO no matter the flavor of LTO, you just
need to make sure you specify the correct FORMAT= to be able
> to read the ULTRIUM tapes and read/write the ULTRIUM3C tapes.
FORMAT=DRIVE should handle that.
>
> Now just let the LTO-1 tapes go away via expiration, reclamation or you
can MOVE DATA them. Same storage pools and everything.
>
> Same concept as was discussed on this list with upgrading 3590 drives to
higher capacity drives. Like B's to E's.
>
> Or am I on the wrong track here....? But I don't see why it wouldn't
work.
>
>
> Bill Boyer
> "Some days you're the bug, some days you're the windshield" - ??
>
> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf 
> Of
Meadows, Andrew
> Sent: Wednesday, June 22, 2005 12:09 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: LTO1 to LTO3
>
> Hello everyone again.
> Current configuration:
> TSM version 5.2.1.1
> Library 3854
> Drives Fibre attached LTO gen 1 (8)
>
> The higher powers here have asked me to make up a plan to migrate from
LTO Gen 1 tapes to LTO Gen 3 tapes. I am putting a plan
> together and was wondering if anyone has done this same move and if I am
missing something in my plan.
>
> 1) Upgrade to TSM Server version 5.3
> 2) Hardware removal of 3 LTO Gen 1 drives, replaced with LTO Gen 3
> 3) New Dev Class for LTO Gen 3
> 4) New Stg pools for LTO Gen 3
> 5) Migrate data
> 6) Remove LTO Gen 1 drives remaining
> 7) Remove Old Storage pools.
>
> I know this is a rather simplistic list here.
> I also have a few questions will I have to change TSM to recognise the
full 8 character labels at this point as well?
> Again if anyone has done this please reply, or if you see any
fundemental flaw in my plan.
> Thanks,
> Andrew
>
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