Since no one else has mentioned it, here is my two cents...

When I was the system manager for a very busy 987 we had performance
problems. Using SOS/3000 we discovered that our "queue length" was too
long. According to the worthy gentlemen at Lund Performance solutions we
had too many IO's trying to use Ldev 1.

Adding another disc to the MPE_SYSTEM_VOLUME_SET allowed some of the load
associated with the operating system (spool files, transient space and the
like) to be given to the new spindle. Our performance problems disappeared.

A 2Gb drive would cost about $500 used and could be installed yourself (T10
torx screwdriver required.) <grin>

Paul Courry



At 01:56 PM 11/18/98 -0500, KPORTER wrote:
>I am setting up a new 969KS120 with mirroring.
>I have all drives but Ldev1 set up as a private volume, mirrored.
>There is only one drive, Ldev1 in the system volume. HP tells me that this
is a
>valid configuration.
>
>However, the response centre now tells me that I may (or may not) see
>performance problems since I only have the one spindle in the system volume.
>
>As far as I can see I will have spool files and transient files going to the
>system volume. Everything else is on the private volume.
>
>Anyone have any experience with this?
>
>Keith Porter
>System Manager
>Hamilton Discount Corp.
>
>