The following are 3com's recommended specs for maintaining redundancy while running dual power supplies units or PSU's. If you are running 2 PSU's with the following recommendations you will not have any issues if one of them fails. 45 Amp = 6 DSP's, 1 HiperArc, and 1 NMC 70 Amp = 10 DSP's, 1 HiperArc, and 1 NMC 130 Amp = You can fully load the chassis These are what 3com recommends....you can go a bit more but then you're not doing what the equipment vendor recommends. Todd -----Original Message----- From: usr-tc-admin@mailman.xmission.com [mailto:usr-tc-admin@mailman.xmission.com]On Behalf Of Chris A. Kalin Sent: Friday, August 16, 2002 1:22 PM To: usr-tc@mailman.xmission.com Subject: Re: [USR-TC] What is a conservative dsp to arc ratio? At how many ARCs and DSPs would we need to switch to 130A power supplies? Would having two 70A supplies serve the same purpose as having one 130A, other than the obvious fact that if one of them were to go down, the chassis would be very underpowered. :) Thanks! Chris Kalin ----- Original Message ----- From: "Todd Bertolozzi" <berto@voyager.net> To: <usr-tc@mailman.xmission.com> Sent: Friday, August 16, 2002 11:54 AM Subject: RE: [USR-TC] What is a conservative dsp to arc ratio?
I have many chassis setup dual arc (7 dsp's per arc on each chassis).
I have not noticed any issues with this. Guess it depends on how much stuff the arc is doing and how much memory it has. You can definitely go more then 3 though.
Todd
-----Original Message----- From: usr-tc-admin@mailman.xmission.com [mailto:usr-tc-admin@mailman.xmission.com]On Behalf Of Aaron Nabil Sent: Friday, August 16, 2002 11:19 AM To: 'usr-tc@mailman.xmission.com' Subject: [USR-TC] What is a conservative dsp to arc ratio?
I'm running 3 to 1 now, where have other people started seeing problems at?
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