A word of warning - I will try to answer some of your questions even though
I don't do offsite backups this way.  I do use copy pools.  Your first
question makes it sound like you have just 1 tape drive.  If thats true, you
need to get a second one.  You can get by with one, but it isn't pretty.

1) The copy pool can use the same device class as the primary tape pool.
2) The copy pool will be at least as large as the primary tape pool.  It
   will probably be larger, because you will be sending partially filled
   tapes offsite and objects expire increasing the reclaimable space.
3) You can use a "query volume stg=YOUR_COPY_POOL_NAME" or an equivalent
   Select command to get of list of the tapes; then you will need to change
   their status to offsite.
4) The concept of "a prior day" does not apply to ADSM.  Today's tapes
   contains only the stuff that changed since yesterday.  All off site
   tapes must stay off site until they are empty or until they can be
   reclaimed.
5) You will have to change their status to ???
6) You can have a second remotely located ADSM server and store your copies
   there.

On Mon, 22 Mar 1999, Donald Burdette wrote:

> We have been looking at starting the next step in moving forward with
> ADSM and that is to implement copy storage pools. I think I understand
> conceptionally how they work, but I am having trouble with the
> details/implementation. Here are my statements/questions which I would
> like to have clear before I proceed:
>
> 1) Can the copy I make be to the same tape drive that currently houses
>    my primary tape storage pool?
>
> 2) I must have enough tapes to make a copy of the disk storage and at
>    lease equal to the number of tapes with data on them in my tape storage
>    pool. Is this correct?
>
> 3) After I finishing making a backup, how do I know which tapes to take
>    off-site after the copy has completed?
>
> 4) Let's assume that I always want to have the prior days backup off site.
>    So what I really need is two sets of tapes (at a minimum). One will be
>    off-site and the other on-site read to do the days backup. Is this
>    correct?
>
> 5) As I understand it, this is not an incremental process, it is a
>    complete copy of disk and tape storage pools. When I bring the tapes
>    from off-site, what must I do to ready them for use again?
>
> 6) What other alternatives (if any) are there for having an off-site copy
>    of the data?
>
>
> I am sure other questions will come to mind based upon your feedback,
> but I will ask them as they come. Thanks for your help!
>
>
> Don Burdette
>