You don’t have to get rid of all your DISK space. The best practice has been to 
keep enough DISK space to receive two nights’ worth of backups. That storage 
pool would be set up so its next storage pool (for MIGRATE STG commands) would 
be ONSITE. You could keep enough to hold 30 days' worth of data; that would be 
consistent with your original notion. But most of us would consider that a 
wasteful, extravagant design. (And we’d all think about submitting a resume 
with your employer, envying such resources!)

Keeping enough data for two nights’ worth would be a lot smaller than keeping 
all your current data, which seems to be what you expected to do. That “left 
over” disk space might become volumes in an ACTIVE DATA pool if ONSITE is tape 
pool. Alternately, the DISK pool migrates to a FILE pool (DISK is better for 
short-term storage; FILE seems better for long-term), which in turn migrates to 
TAPE. 

In all cases, the copy group destination(s) for all domains’ management classes 
would be the DISK pool, just like your original plan implied. 

Looking at your 443 area code, you are near an active TSM user group in the 
Baltimore/Washington region. You should make some new friends in that group 
with whom you might brainstorm face-to-face. 

Nick

On Mar 24, 2014, at 1:38 PM, Tom Taylor <TTaylor AT JOS-A-BANK DOT COM> wrote:

> Using this set up doesn't this mean the backups would go to the tape first
> if the tape pol were the primary pool? Wouldn't that make backups slower?
> How do I get backups to go to the disk first while still having different
> expiration for each?
> 
> Thomas Taylor
> System Administrator
> Jos. A. Bank Clothiers
> Cell (443)-974-5768
> 
> 
> 
> From:
> Nick Laflamme <nick AT LAFLAMME DOT US>
> To:
> ADSM-L AT VM.MARIST DOT EDU,
> Date:
> 03/21/2014 02:50 PM
> Subject:
> Re: [ADSM-L] File retention
> Sent by:
> "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
> 
> 
> 
> It doesn't work that way.
> 
> If you want to keep a copy of inactive files on tape forever, you need to
> have a primary storage pool on tape (call it "ONSITE" for the purpose of
> this note).  So, BACKUPS will migrate data to ONSITE. You'll also use
> BACKUP STG to populate OFFSITETAPE, mostly from BACKUPS, but possibly from
> ONSITE just to be safe.
> 
> You can use a migration delay on ONSITE to keep recent (<30 days, if you
> want) files from migrating tape, but eventually some active files will
> migrate to ONSITE.
> 
> It might make more sense to use your disk storage as an ACTIVEDATA storage
> pool, not a long-term primary storage pool. Your inactive data would still
> go to tape, but your active data, even the oldest, would be on disk (as
> well as on tape).
> 
> Hope this helps,
> Nick
> 
> 
> 
> On Fri, Mar 21, 2014 at 1:11 PM, Tom Taylor <TTaylor AT jos-a-bank DOT com>
> wrote:
> 
>> Hello,
>> 
>>        TSM 6.3.4.3 on Windows 2008 R2
>> 
>> 
>> I'm wondering if someone can direct me to a document or the area of the
>> admin guide that has this info. I feel like I have read and re-read that
>> thing and am getting nowhere. I thought the answer was management
> classes
>> but I cannot find how to do it...
>> 
>> 
>> 
>> 
>> ... and it is...
>> 
>> I have a primary storage pool called "BACKUPS" it is on-site disk.
>> 
>> I have a copy pool called "OFFSITETAPE" and as its name suggests it is a
>> tape library and we will send tapes offsite.
>> 
>> 
>> I want to use OFFSITETAPE to backup BACKUPS.
>> 
>> 
>> What I want to accomplish is I want to set the primary pool to keep10
>> versions of files for 30 days, and 10 versions of inactive files also
> for
>> 30 days, and keep the last version for 30 days, but I want the copy pool
>> to keep teh last version of an inactive file FOREVER.
>> 
>> 
>> I want this because I want to conserve space in the primary disk pool,
> but
>> the tape copy pool has a LOT more room, so I want to keep files in there
>> longer. Also I am required to keep a permanent backups of ALL files
>> forever... i.e. I want to keep the last version forever, but I do not
> have
>> room in the primary disk pool to keep every file forever. This is why I
>> want to expire old files in the primary including the last version but
>> expire everything in teh tape copy pool also EXCEPT FOR the final
> inactive
>> version of a deleted file.
>> 
>> 
>> 
>> 
>> Can this be done? Have I just overlooked it in the guide?
>> 
>> 
>> 
>> Thanks!
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> Thomas Taylor
>> System Administrator
>> Jos. A. Bank Clothiers
>> Cell (443)-974-5768
>>