We have 20 9840's, not LTO's, but I wouldn't expect the topology preferences to be much different. We go 9840 -> SAN cloud (FC switches) -> 4 HBAs in TSM server. If you have existing SAN infrastructure, I don't know that I'd recommend putting a switch in your library. Personally I'd just run Fibre from the drives to your existing switches. Whether you use hubs or not to aggregate your drives per switch port seems to be a purely cost and infrastructure (like Becky) and support driven decision. I haven't run into drawbacks with FC hubs and small loops for port aggregation, but from my standpoint, if I can afford 1 or 2 switch ports per drive, I'd rather go with Simpler than install hubs. Of course, your mileage may vary.
Alex Paschal Freightliner, LLC (503) 745-6850 phone/vmail -----Original Message----- From: Tom Kauffman [mailto:[EMAIL PROTECTED] Sent: Wednesday, September 10, 2003 11:39 AM To: [EMAIL PROTECTED] Subject: How have you got your fiber-attached LTO drives connected to your TSM server? I will be going fiber-attach next year and will have two adapters in my TSM server. Do I put a fiber switch in the tape library (3584), tie all the drives to it, and run two fibers back to the TSM server? Do I run seperate fibers for all the drives back to my existing switches? Do I put a pair of fiber hubs in somewhere, and hook half the drives to each hub? Ah, yes, it's that wonderful time of year when the leaves start to turn -- and the next year's budget projections are due :-) Tom Kauffman NIBCO, Inc CONFIDENTIALITY NOTICE: This e-mail and any attachments are for the exclusive and confidential use of the intended recipient. If you are not the intended recipient, please do not read, distribute or take action in reliance upon this message. If you have received this in error, please notify us immediately by return e-mail and promptly delete this message and its attachments from your computer system. We do not waive attorney-client or work product privilege by the transmission of this message.