It's not so much the number of spindles as the amount of space.  LDev 1
needs at least 4 GB as a boot device to insure all system required
functions work properly.  4 GB is also the maximum a non-internal boot
drive will use (coincidence?).  It is recommended that you have 3 spindles
on the system volume to handle the performance load of spooling and system
command calls.  I have setup systems with 1 or 2 spindles but only when I
was sure the spooling activity would be very low and/or the client was
aware of the potential problem.
---------------------- Forwarded by Ward Hammond/Forsythe on 11/18/98 03:29
PM ---------------------------


[log in to unmask] on 11/18/98 12:56:42 PM

Please respond to [log in to unmask]

To:   [log in to unmask]
cc:    (bcc: Ward Hammond/Forsythe)
Subject:  MPEXL_SYSTEM_VOLUME_SET




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.