Jim Lawrence
accessd at shaw.ca
Mon Jul 19 19:21:38 CDT 2010
I had a client who owed a Dairy. The server was stored up stairs in the refrigeration warehouse. This location had three issues that needed resolving before the system would remain stable. 1. The upper-floor of the warehouse would over heat due to a combination of close proximity to the roof and being right above the refrigeration compressors. It would get so hot that the hard drives wouldn't read. 2. The power source was unreliable and as soon a compressors would turn off an on the computers would get seriously wacked. I replace 2 motherboards in just over a month. 3. The environment was so full of static that the signals through the network CAT5 cables were continually dropping. Network performance was that of a 4 mbit Arcnet connection. The problems were resolved by running an air duct up from the cooler, installing a big top of the line, through the battery, UPS and the cables from the server to sales offices was replaced with 75ohm coax cable and two combo LAN cards to a coax hub (IRQ 5 and 7...if anyone remembers those times and designations). Jim -----Original Message----- From: accessd-bounces at databaseadvisors.com [mailto:accessd-bounces at databaseadvisors.com] On Behalf Of Michael Bahr Sent: Monday, July 19, 2010 10:30 AM To: Access Developers discussion and problem solving Subject: Re: [AccessD] disk drive temps for the Norco 4020 John, the temps are largely dependent on the evironment. Having your system in a temperature-controlled room like the host servers do will lower the temps. Those environment are usually around 60 degrees F. If you have your system tucked away in your house and the temp is ~75 degrees F, then you **may be** pushing the limits. You really need to find some alternate means to lower the temps. One easy solution is to find a high velocity fan(s) that you can replace in your system. It will make some noise but better fan noise than HD noise--:-O. Maybe a high performance CPU cooler like one from Zalman. With my over-clocked system I run a Zalman cooler and a high-velocity fan which reduced my CPU temps by amost 10 degree C. When I process videos my CPU jumps up from ~41C to ~55C and stays there for hours on end. I believe the thermal shutdown of Intel CPU's is around 80 degrees C. The cooler I can keep things the longer the electronics will last. Mike... > Michael, > > You are right it does look high, and no, I was not particularly stressing > the system. The problem > here is that I have 20 hard disks dumping heat into the back part of the > box. So the CPU is not > starting at ambient, it is starting at ambient plus disk heat load. > > To be honest I do not worry about the CPU until it gets well north of 60C. > In one of my many > previous lives I was tasked with running an oven that did a burn in on PC > boards. We burned in our > boards at 180 F (80C). Of course those were mil spec and they were not > expected to run at that temp > forever but that did convince me that electronics can easily survive the > occasional forays into > scorching temps. > > The real issue will come when I get a pair of 8 core or 12 core processors > in the case. These new > procs are rated to run all cores full tilt at under 125 watts but that > does add even more heat load > into the case. > > John W. Colby > www.ColbyConsulting.com > > > Michael Bahr wrote: >> John, the CPU temp looks unusually high, 55C. Were you playing any >> games >> during the testing? Is this the idle temp? >> >> Mike... >> >>> I bought the Norco 4020 to build a server with. >>> >>> http://www.newegg.com/Product/Product.aspx?Item=N82E16811219021&cm_re=4u_rac kmount_case-_-11-219-021-_-Product >>> >>> I am impressed with the case, though it is consumer grade. It is tough >>> to >>> work with however. It >>> has a fan wall just behind the disk drive cage which leaves exactly two >>> inches between the fans and >>> the disk backplanes. Obviously it is impossible to leave the wall in >>> place and get all of the >>> cables in, but removing the fan wall is a job for a safe cracker. >>> >>> None the less I did so, got 20 disks in and cabled up, then reinserted >>> the >>> fan wall, and then >>> threaded the cables through the holes in the BOTTOM of the fan wall. >>> Why >>> on earth they didn't leave >>> the holes on the top of the fan wall is beyond me but they didn't. >>> >>> Anyway, for the first time tonight I tested temps with all 20 drives >>> inserted and power applied, and >>> the fan wall operating. I ran a defrag on every volume simultaneously >>> in >>> order to cause the disks >>> to work and generate as much heat as I could cause. >>> >>> Below are the temps. >>> >>> CPU Temperature 55 ºC >>> Ctrl Temperature 49 ºC >>> Power +12V 12.099 V >>> Power +5V 5.053 V >>> Power +3.3V 3.328 V >>> SATA PHY +2.5V 2.528 V >>> DDR-II +1.8V 1.872 V >>> PCI-E +1.8V 1.872 V >>> CPU +1.8V 1.856 V >>> CPU +1.2V 1.232 V >>> DDR-II +0.9V 0.928 V >>> Hdd#1 Temperature 37 ºC >>> Hdd#2 Temperature 40 ºC >>> Hdd#3 Temperature 42 ºC >>> Hdd#4 Temperature 39 ºC >>> Hdd#5 Temperature 47 ºC >>> Hdd#6 Temperature 51 ºC >>> Hdd#7 Temperature 49 ºC >>> Hdd#8 Temperature 46 ºC >>> Hdd#9 Temperature 37 ºC >>> Hdd#10 Temperature 49 ºC >>> Hdd#11 Temperature 44 ºC >>> Hdd#12 Temperature 47 ºC >>> Hdd#13 Temperature 45 ºC >>> Hdd#14 Temperature 50 ºC >>> Hdd#15 Temperature 49 ºC >>> Hdd#16 Temperature 42 ºC >>> >>> There are only 16 drives showing because these 16 are cabled up to my >>> Areca raid co-processor card >>> which is a 16 port card, and that card provides a utility to watch >>> these >>> numbers. The other disks >>> are not being driven but do have power applied. >>> >>> I am satisfied with the temps. Several disks actually hit 53 degrees C >>> under max stress but that is >>> acceptable to me. I would like lower temps but I can live with these. >>> >>> BTW I am using the Corsair 750W modular PS which is a NICE PS. >>> >>> http://www.newegg.com/Product/Product.aspx?Item=N82E16817139010 >>> >>> The 12V cables are ribbon cables which makes them very easy to run and >>> minimizes the air flow >>> impedance. With only 2 inches to work with between the fans and disks, >>> I >>> need all the help I can get. >>> >>> -- >>> John W. Colby >>> www.ColbyConsulting.com >>> -- >>> AccessD mailing list >>> AccessD at databaseadvisors.com >>> http://databaseadvisors.com/mailman/listinfo/accessd >>> Website: http://www.databaseadvisors.com >>> >> >> > -- > AccessD mailing list > AccessD at databaseadvisors.com > http://databaseadvisors.com/mailman/listinfo/accessd > Website: http://www.databaseadvisors.com > -- AccessD mailing list AccessD at databaseadvisors.com http://databaseadvisors.com/mailman/listinfo/accessd Website: http://www.databaseadvisors.com