There is a "system memory Alert" in the hardware status tab of my VCenter, there is no problem with the hardware because I enter the IBM's IMM (Integrated Managment Module) and the server does NOT indicate a fault in the DIMM or memory slots or something that indicates a physical memory problem.
At this point my guess it's a VMware problem, but as I log on directly to the ESX Host, there is no such alert in the Configuration>Health Status section, I reset the managment services thinking it's some kind of VCenter-ESX Host problem, but the alarm continues in the VCenter
The Alarm it's a root directory on the DIMM's section as you can see at the screenshot...
Have you tried resetting the sensors on the Hardware Status tab for the host to see if that clears it up?
I have this same problem, only with a Cisco UCS system.
Yes I have tried reseting the sensor, from the VCenter and directly from the ESX host
I have 3 more ESX Host's like this, and they don't report this kind of problem
I'm seeing the same issue with some of my B200 M1 blades. I had memory faults and replaced the DIMM's. All is showing clear in the UCS GUI but still seeing this Alert in vSphere 5.
The thing is that I have in the inventory 6 ESX hosts, which 5 are ver. 4.0 and only one 5.0, the other four 4.0 don't have this problem and neither the 5.0
The only thing I want to know it's that this error it's some kind of BUG of VMware, and there is no risk, i can live with the Alert turn ON
It must be a bug with ESXi 5. I had an ECC problem with one of my UCS blades. I replaced the RAM and UCS reports all happy, but vCenter Hardware status still shows the Memory alert. I've reset and updated the status but it doesn't clear. There must be some counter in vCenter that needs to be reset. Anyone get a resolution on this yet?
I just came across this post that resolved the issue:
http://communities.vmware.com/thread/329248
Scroll down to Simon's resolution. That worked for me.
The solution was a faulty HDD in the server, that didn't was a Alert, it only said that was a "Predictive Failure", the HDD was replace by the manufacture and the error went away, thaks to everybody who kindly responded
Try this KB: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=206109...
this command helped me: /etc/init.d/sfcbd-watchdog restart