>1U is 1.75 inches of height in a standard rack. Therefore a 3U device >only takes up 5.25 inches - not a lot of space when compared to an RVA! >>>Mainframe disk is pretty small in today's form factors. >>I'm somehow behind in terminology. >>I've seen a few posts that state something is #U. >>EG: 3U. >>What does that mean?
And I suppose I should fill out what I was thinking here. There are plenty of environments (including Multiprise 3000 environments with built-in storage) in which a whole cabinet (or rack) is a lot of physical space, in reality and/or in management psychology. Mainframe storage is tiny now, at least in the IBM DS6800 case (perhaps others, too). That 3U height holds up to a few terabytes, and those terabytes can be split among multiple types of servers. You can expand in 3U increments if you need more than a few terabytes. That's what enterprise-class storage has become: tiny. (That 3U is also very fast. Not as fast as the big cabinets, but fast.) And tiny investments are quite often easier investments. Funny how people are that way, but there it is. If somebody looks at the thing he/she can't help saying, "That's it? That's all you want?" Did I mention it's tiny? - - - - - Timothy F. Sipples Consulting Enterprise Software Architect, z9/zSeries IBM Japan, Ltd. E-Mail: [EMAIL PROTECTED] ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
