Hi Bob,

>     One given is to set up User Volume Sets (SYSTEM, PRODUCTION, TEST).
>

This is the best first step.  Look in the latest issue of the InterexPress
magazine for a checklist on how best to do this.

>     I'm looking for some feedback from the list about any concerns or
>     problems in using Mirrored Disk. With adding 4 more disk drives, I can
>     set up the following configuration:
>
>        System:         2 drives

From a performance perspective I would rather see at least one more spindle
for the system volume set.

>        Production:     4 drives

Again, from a performance perspective you could use more spindles.
Remember that you are going from 10 spindles to 4.  Generally not a good
situation.  But as every good performance person will tell you: "It
depends".  If you aren't doing a lot of I/O, it doesn't matter if you
continue to not do a lot of I/O but on fewer spindles. YMMV.

>        Prod Mirrored:  4 drives
>        Test & other    4 drives
>
>     My concern is the possibility of an I/O bottleneck by bringing the
>     production data down to 4 drives, when it used to be spread over 10.
>

You are well-advised to be concerned.

>     Thanks in advance for any responses to the above.
>
>
>     Bob Mueller                        [log in to unmask]
>     M.I.S. Manager                     Phone: 201-967-3680
>     Datascope Corp. - PM Division      Fax: 201-265-1867
>
>


Bill Lancaster
Lancaster Consulting