I have an APC Symmetra. Most of its parts are redundant so, if something goes down, you should have time to replace it before the unit goes completely out. Nothing has failed so I haven't had to rely on the redundancy. The main drawback is they are EXPENSIVE.
Curt > -----Original Message----- > From: Ben Scott [mailto:mailvor...@gmail.com] > Sent: Monday, February 09, 2009 8:57 PM > To: NT System Admin Issues > Subject: UPS recommendations > > Hi all, > > We had a power outage today. I looked over at the server rack just > in time to see one of the UPSes light up like a Christmas tree, shriek > like an injured parakeet, and then kill itself. (Admitted it was old, > but a graceful failure this was not.) The servers with redundant > supplies failed over to the other UPS, which promptly went into > over-current alarm and dropped the load. Either said UPS's management > software has been grossly misreporting its load, or two UPSes at 40% > load doesn't include enough margin during transfer. Any which way you > slice it, it's time to buy some new UPSes. I'm going to ask for two > entirely new 1400 or 2200 VA units (existing were 1000 VA), although > budget may be an issue. > > What do people like for UPSes, *and why*? I don't see much > variation across manufactures in a given price band. At a given > dollar amount, it seems I get roughly the same capacity, features, > etc. I'm thinking differences in management software and quality of > support don't show up in a spec sheet. Comments on that front are > especially welcomed. > > In particular, I'm interested in how to manage a multiple-server, > multiple-UPS scenario. Our two biggest servers have redundant > supplies. I'd like to plug each supply into a different UPS. So each > UPS will be powering multiple servers, and each server will be drawing > power from multiple UPSes. I imagine that makes the management > software configuration a bit trickier, specially since a lot of > management packages used to assume one-UPS-per-server. > > -- Ben > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ > ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
