A question for great Informix minds.....

Hello, everyone, Would anyone out there like to share their thoughts on the best way to lay out dbspaces? We have several databases, ranging from 50 mg to 200 gig in size, that we're migrating to a new platform. Our new platform is a Sun E4500 with 8-400hz processors and 1.5 gig of RAM. We have an A-1000 disk array with 18 gig drives (10,000 r.p.m.), and a single controller. The storage array is set up with a hardware level RAID-5 configuration. We're using Veritas to manage storage. The new platform will be running IDS 9.2 with Solaris 2.7. We're trying to decide how many dbspaces we should allocate. Should we allocate at least one dbspace for each database, regardless of the size? Should we allocate one dbspace to dump all of the little databases into? Should we allocate multiple dbspaces for the large databases? Are there any advantages to fragmenting dbspaces with a RAID-5 configuration? Any suggestions for a good chunk naming convention? I'm very interested to hear your thoughts on this subject. Regards, Vickey Crouch