Single point of Failure - Other than John's saying he's moving to Hitachi Mod 9's, he really didn't describe his storage. It would probably be safe to assume (& watch me get burned on this one) he's got RAID DASD - in which case he does have some protection. In my case, in the last 10 years I've had zero DASD failures, but I've 5+ catalog failures which I've had to recover from. So if he's going to be worried about a failure, I'd say his time would probably be better spent looking at his catalog backup & recovery procedures (insert plug here for DINO Software's TREX).
With that said, I'm with Bob in that I'm 'old school' enough that I'd spread my catalogs across at least a few volumes. For one thing, I want plenty of room for catalogs to take 2ndary extents. Not much worse that getting called at o-dark in the morning because some application failed because a catalog can't take a 2ndary. John - are you running with PAV's? Even though catalogs can be cached in memory in CAS and using ECS, eventually catalogs are going to need to be updated meaning writes to DASD - if you don't have PAV's and you've got all your catalogs on one volume, you've got limited access to your catalogs. Something to consider - some of my catalogs are very busy during certain times of the day and one volume would be an issue for me without PAV's. ddk This e-mail message and all attachments transmitted with it may contain legally privileged and/or confidential information intended solely for the use of the addressee(s). If the reader of this message is not the intended recipient, you are hereby notified that any reading, dissemination, distribution, copying, forwarding or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately and delete this message and all copies and backups thereof. Thank you. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
