On Thu, Apr 14, 2011, Brunner, Brian T. wrote: >centos-bounces at centos.org wrote: >> On Thu, Apr 14, 2011 at 5:06 PM, admin lewis >> <adminlewis at gmail.com> wrote: >>> Hi >>> I have a Dell PowerEdge T310 *tower* server.. I have to buy an ups by >>> apc... anyone could help me giving an hint ? >>> a simple "smart ups 1000" could be enough ? > >UPS and Power Supplies are not all the same. >If the UPS has a stepped voltage output (not smooth sine wave like the >local public grid has) in large enough steps to mess up the power >supply, you wind up with no UPS in effect. We have been using APC UPSs for decades now, and the only major problem I've seen is batteries swelling in some of the rack-mount chassis making them difficult to impossible to remove. By difficult I mean taking the cover off the UPS to get to the batteries. By impossible, taking the cover off reveals that the construction is such that the batteries won't come out the top. We lose power fairly frequently here, and need the UPSs to keep things going long enough to get generator backup started. I have found that the APC UPSs really don't like cheap generators. We had a week long power outage after the 2001 Clinton Inaugural windstorm, and I got an inexpensive generator from Sears which didn't work at all with APC equipment. We're now using Honda generators which are very quiet, and have kept things going for over a week at a time. Bill -- INTERNET: bill at celestial.com Bill Campbell; Celestial Software LLC URL: http://www.celestial.com/ PO Box 820; 6641 E. Mercer Way Voice: (206) 236-1676 Mercer Island, WA 98040-0820 Fax: (206) 232-9186 Skype: jwccsllc (206) 855-5792 Find out just what people will submit to, and you have found out the exact amount of injustice and wrong which will be imposed upon them; and these will continue until they are resisted with either words or blows, or both. The limits of tyrants are prescribed by the endurance of those whom they oppress. -- Frederick Douglass.