Sorry to hear that you too have this issue.  I reported this same issue to HP 2 weeks after starting up my HS.  I was first told to do the server recovery, that it should correct the incorrect reporting of the temperature.  I called back a week later just to make sure and was told that the error would come right back and to not bother do the server recovery.  I was given a case number and told that HP was working on a software fix and would be sending it out as an update.   This last communication was mid April.   Like you, my HS temperatures have risen, today they are:

Upper Fan: 1493 RPM    System Temp 86 degrees C or 186.8 degrees F

Lower Fan: 1480 RPM   CPU Temp 26 degrees C or 78.8 degrees F

 I know that the system temp is wrong, the temperature in the top of the server is lower than the temp coming out at the bottom where the CPU resides.  I only have the one drive installed so there is no heat source at the top of the box to drive the temp up.

I too, do not like that my system is reporting such high temps in error and certainly hope HP comes out with the software fix soon. 

I suggest that you get the SpeedFan application and install it (via RDP) on your MSS. One thing you will immediately discover is that the MSS fans run at only 50% speed! I would recommend increasing to 100% and watching the temperatures. (Use the "Chart" tab in SpeedFan.)

I have set up mine to automatically adjust the fan speeds to control the temperatures AND to set the speed to 100% on each fan if the application is closed. My MSS runs cooler this way and, I hope, this will result in a longer life.

Temperatures WILL increase as the CPU is loaded -- and it happens fairly quickly, too. So if you have added Add-Ins or applications that use CPU cycles this will raise the internal temperatures. You may want to check the process activity (use Task Manager) to see if there is something loading the CPU constantly. (DEMIGRATOR.EXE is the "balancing" function -- that can really run a long time if you have the "stock" CPU and memory configuration -- I know of one case where that was found to be the cause of a rising temperature. (At least one other case very similar to yours was found to be caused by a constantly running application. When disabled the temperature returned to normal!)

Be careful comparing the SpeedFan temperatures to the System and CPU temperatures reported in Settings-->Hardware Status nto make sure you are comparing the right ones. Also note that the Temp1-3 indicators do NOT seem to be the disk temperatures. Also note that you may at times see six temperatures reported and, at many (most?) times only five. We haven't figured out why the intermittent one (a number of folks report it as intermittent) or where some of those sensors are located.

Speaking of disks: If you use the Disk Management Add-In it will report the actual disk temperatures based on a WMI query to the drives. The Client Info Add-In does the same thing -- but the temperature reported is slightly (but consistently) different. Seagate drives tend to run 30-37C and the WD 1TB drives run 23-32C (using Disk Management).

If all of your temperatures run hot using all these packages I would not think it is a software problem.

A good place to continue this discussion would be over on MediaSmartServer.net. I started a thread on SpeedFan there to consolidate discussions on that application:

http://www.mediasmartserver.net/forums/viewtopic.php?t=1236&highlight=speedfan

There are also a lot of other "temperature" discussions in other threads, and a good "search" tool to find them!

...JohnBick

Same hardware fault for me. System was fine for about 4 months but system temperature sensor started rising a little each day for the last couple of weeks which concerned me till today it exceeded the OK temp of 65 Celsius and went to 70 and started getting upset about it.

While it is obvious the system is not at this temperature from feeling the case and air coming out the back, and while you can ignore the reported error to get the nice green lights back, the thing keeps writing an error message to the application log every second to tell you the temperature is critical.

CPU temperature remains around the 20 Celsius mark. I did a hardware upgrade to the memory when I first got the server and it has been fine for three months with four 500Gb drives until this month.

Was there any automatic update that could cause this and how can the error reporting of this specific error (and not others) be turned off before my disks eventually fill up with rubbish log records.

I had the same issue and was provided the fix for the software from HP support.
Email me and I can send you the fix.
Thanks,
Joe

JohnBick,
It was explained to me that the sensor is a redundant one that was malfunctioning and the fix would disable it. If HP though there was any danger it would not provide the fix and replace the unit. The CPU is the true measurement as it was explained to me.
My server was this way out of the box, I opted to return it and get another.
As far as a software bug, I believe it is not one, a faulty sensor it is. Different hardware manufactures implement different hardware configurations. If you were to build a home media server would you even have the same sensors available? Typical CPU you would, system probably not.
The file provided was SystemTempHotfix.msi
Thanks,
Joe

The HP MSS has six temperature sensors; one is intermittent for everyone but the other five are consistent and reliable. There is the CPU internal temperature and a redundant measurement on the CPU socket. The Northbridge controller has an internal sensor and there is one in the power supply. And there is the one on the backplane -- which was reported as the "System" temperature. And, of course, all the current disk units also have temperature sensors within.

When I build a system, client or server, one of the things I look for is that it includes redundant temperature sensors. It is very difficult to just add one, but there should be one on every major component. There was only ONE on the MSS backplane, a primary spot to monitor fan and disk heat problems. Granted, the disks provide some redundancy and could help to monitor the fan operation in a remote system; even the CPU would provide that to some extent.

I am personally disappointed that HP is choosing to stop reporting temperatures but between the Disk Management Add-In and SpeedFan we can access and monitor things anyway.

Here's a suggestion for an Add-In: Monitor AND PLOT/GRAPH the six internal temperatures (as shown in SpeedFan) as well as all the attached disk drives. Also overlay a plot of the CPU utilization and fan speeds. Allow the user to enable/disable each plot. Anyone up to the challenge? I volunteer to be a beta-tester!

...JohnBick

MY CPU is running at 32 C per hardware settings and drives 39 and 43 C per disk management. My fans are running at 1450 per hardware settings. This HArdware warning I am starting to get sounds like the problem others have had. Had my server for about 5 months now. EX470....with 1 TB and 1 500 gb. Memory upgrade from start.

Phil23 said: Further more when I go to HP Mediasmart updates it now states last update UNKNOWN and when I click check for updates it starts checking then says CANNOT CONNECT TO HP MEDIASMART SITE.................Whats going on with this???HELP

Not to worry about the "Unknown". Mine shows that (has for a while now) and others report the same.

The HP site is likely quite busy (processing updates for the EX48x units) and that is the likely reason you could not connect  last evening.

...JohnBick

The warning I get is in the system health tray. It says hardware issue..then you open the problem and it says CPU over heating. You know the system health warnings that can turn one of the lights red on the front bezal of the server to let you know you have system health warning or your tray icon for the server turns red.

EX470 1TB seagate and 500 gb in pool, 2GB memory, LE-1640
Laptop Vista Ultimate SP1
PS3
Netgear WNR3500