Well, Ladies and Gents I have found a solution.  I opened a PMR with IBM, and 
they found (after we went through all the queries you can think of) this 
technote:  
"http://www-01.ibm.com/support/docview.wss?rs=663&context=SSGSG7&uid=swg21269453&loc=en_US&cs=UTF-8&lang=en";.

In it, it says to set all volumes to read-only (which will work if you have all 
the storage pools set to read only that use LTO2 tapes), and update your device 
class and set "format=drive".  Once I did the last part (all the storage pools 
were already set) TSM loaded up an LTO2 and started moving data.

Thanks for all the suggestions, and assistance!  The PMR was expedited by being 
able to answer many of the questions you guys asked.


See Ya'
Howard Coles Jr.
John 3:16!

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Michael Green
Sent: Monday, May 17, 2010 4:24 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] LTO2s not mounting in LTO4 drives

what's the output of
q libr * f=d
q dev * f=d
q path * f=d
--
Warm regards,
Michael Green



On Sun, May 16, 2010 at 11:29 PM, Len Boyle <Len.Boyle AT sas DOT com> wrote:
> Howard did you update all the lto-2 carts to read/only?
>
>
>
> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf 
> Of Howard Coles
> Sent: Sunday, May 16, 2010 4:16 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: [ADSM-L] LTO2s not mounting in LTO4 drives
>
> We first replaced only 8 of the drives, so that I could see whether all the 
> tapes would mount there.  I noted that LTO2s were mounting in the LTO4s 
> readonly.  However, this was the first time I tried to move data from an LTO2 
> pool since turning on encryption in the Library.  At first I thought that may 
> have something to do with it, but the LTO3 pools are not encrypted, and they 
> mount up just fine.
>
> See Ya'
> Howard Coles Jr.
> Sr. Systems Engineer
> (615) 296-3416
> John 3:16!
>
>
>
> -----Original Message-----
> From: ADSM: Dist Stor Manager on behalf of Richard Sims
> Sent: Sun 5/16/2010 2:46 PM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: [ADSM-L] LTO2s not mounting in LTO4 drives
>
> Howard -
>
> Presumably, you would have tested the ability to read the old LTO2
> tapes at the OS level, before committing to TSM use, via tapeutil or
> the like, so as to assure technology usability.  Did that work, or
> turn up any anomalies?
>
> Technote 1269453 indicates that LTO2 tapes should be usable in an LTO4
> environment, providing that the stipulated actions are undertaken.
> The technote doesn't say whether any path redefinition is needed to
> make it work, however.  I'd use SHow LIBRary to do the most reveal on
> what TSM thinks of the arrangement.  Beyond that, you may have to
> contact TSM Support.
>
>    Richard Sims
>