I will attempt to inject my 2 cents here and answer the questions that
I might have answers for....

> The following questions relate to a VM server, OS/2 and DOS clients.
>
> Since ADSM doesn't allow for tape mirroring, are the tapes in a format
> that will allow for a tape to tape copy?

Don't know, however you should be aware that ADSM's tape pool is a closed
system, defined by the ADSM server and that the virtual contents of the
tape does reduce as files expire.  Any tape is not a standalone entity.
>
> How does ADSM determine which files to backup for an incremental backup?
> If it uses a file date which one does it use?

I believe it uses the modify date.
>
> If you have to restore to a new machine, do the disk drive names on the
> new machine have to match the old disk drive names?

No, I believe that you can specify a new target.
>
> What is the minimum software required to do a full restore to a new
> machine? (using tcp/ip communication)

I think you are asking about a disaster scenario?  If so, a full ADSM
server is required.
>
> What is the maximum file name length for files being backed up?

We have backed up files well in excess of 256 byte pathnames without
problems.  I don't know what the physical limit is.
>
> When a file is restored, are the file access rights also restored?

Yes, at least it is for unix.  I don't know about DOS and OS/2.  On
my DOS restores, I have had no problems.
>
> We currently keep 4 daily, 4 weekly, and 4 quarterly backups. Our
> LAN server administrator would like to keep the same type of routine.
> How can we use ADSM to obtain this type of system?

You cannot unless you bring up parallel servers which is extremely wasteful.
I suggest that you run parallel backups (we do) on a quarterly or monthly
basis.  ADSM is very good at trivial restores (less than a few thousand
objects and less than a few hundred megabytes).  We have filesystems in
excess of 2GB with over one million objects and it is perhaps more practical
to do a full restore (i.e. HDA failure) from a quarterly or monthly and then
use ADSM to clean it up.
________________________________________________________________________
| Mitch Sako          \\\\   \\\\ \\\\\\\\  ||||||||  /////// //    // |
| I-NET Corporation    \\ \\ \\ \\    \\       ||    //      //    //  |
| LSI Logic Contract    \\  \\\  \\    \\      ||   //      ////////   |
| Mailstop E-195         \\       \\    \\     ||  //      //    //    |
| 1501 McCarthy Blvd.     \\       \\ \\\\\\\\ || /////// //    //     |
| Milpitas  CA  95035                                                  |
| local:      mitch@asic                  Phone:  (408) 433-4187       |
| internet:   msako AT lsil DOT com              FAX:    (408) 433-8796       |
| uucp:       lsil!msako                  Pager:  (408) 989-3365       |
| ibmmail:    USMILUN9 AT IBMMAIL                                      |
| DISCLAIMER: Opinions expressed are mine alone                        |
|______________________________________________________________________|