tape drives (IBM SSA, IBM England -> Xyratex)

On Wednesday 30 April 2008, der Mouse wrote: Heh. Our main machine room(s) (two, with doors interconnecting them) draw about 1.1MW of power, which doesn't account for the power used to chill the water to the CRAC units. We just set up cluster in a small machine room that only holds about 12 racks, and is using up about 60kW. :) We do have some FC on our big storage devices (a tape library that has a few thousand slots, and our couple of BlueArc Titan NAS boxes), but that's about it. If you're not really careful with FC, or using a very small, completely homogenous (including firmware version) setup, it's really easy to have big problems that affect everything on the SAN. The administrative group on campus recently had some problems with their EMC-based SAN, which resulted in various machines overwriting filesystems/LUNs belonging to other machines. From what I heard, the root cause was the fact that they had different firmware versions on some of their EMC FC switches. (Or, perhaps, because they're using EMC gear...) Pat -- The Computer Refuge --- http://computer-refuge.org