We are migrating one of our HP-UX 11i database servers
to a new disk array and upgrading it from IDS 9.3 to
IDS 10 at the same time.

Current disk array is an attached SCSI RAID 5 array,
forgive me Art. The new array is a HP XP128, RAID 5 as
well but it was installed before I had much say in
things and before I drank of the RAID 10 cool-aid, so
once again forgive me Art.

The old disk layout consists of a bunch of 2GB devices
but we have several tables that could benefit from
larger devices. I plan on leaving my dbspaces just as
they are now but utilizing one large chunk instead of
several 2GB chunks.

Does anyone in this group have a rule of thumb or
recommendations for the device configurations? Would
one large device divided among all of the dbspaces be
just as good as 20 smaller devices? I would think not
but cannot justify that thought with any facts.

I'm leaning toward n devices of x size so that all of
the devices are the same size and I'll split up the
data how I want. The x size would be some factor of
what's best for the array.

This is a unique opportunity to implement an IDS 10
install with the best configuration possible so I
thought that I'd query the community as see what was
said.

DL
sending to informix-list