Take the 2-minute tour ×
Server Fault is a question and answer site for professional system and network administrators. It's 100% free, no registration required.

We recently built a replicating SAN array from 2x Dell R720XD's, we are using LSI 9270-8i MegaRAID cards with CacheCade 2.0, BBU and Write Back cache enabled.

Our cards are showing HUGE chip temperatures (97*C+ with NO disk activity!).

Our R720's are in auto temp management mode so the max exhaust temp is 50*C.

The MegaRAID cards are passively cooled and depend on good airflow to cool them - however is 97*C normal? - I have seen reference to 60*C max ambients but nothing for chip temp.

share|improve this question
1  
These cards are well known for running hot - so much so that some people add their own heat sinks onto them! –  Michael Hampton Oct 2 '13 at 15:22
add comment

2 Answers

That's really not normal no, what's weirder is that they're both doing it - must be a firmware/driver thing I guess - have you spoken to LSI or Dell about it?

share|improve this answer
    
No I haven't called them - to upgrade the LSI firmware they require you to do it through OS, what kind of crap is that! I guess I can whack the fans on the R720's up full until I can upgrade the firmwares this afternoon, hopefully they won't have baked themselves into oblivion before then. –  Myles Gray Sep 26 '13 at 11:33
    
Updated firmware to latest - same story - 97*C with no load - R720 fans on full ROC temp = 55*C. This thing is WAY too loud with the fans up full and I shouldn't have to do this for the card not to set itself on fire! –  Myles Gray Sep 26 '13 at 17:41
add comment

Well, LSI's response was hardly a solution or even useful:

I do not see anything in the logs that might indicates an overheating of the controller card. The 97 degree Celsius is still withing the range of the temperature threshold of the ROC which will be 115. The main temperature to watch will be the ambient temperature inside the server which requires at least 200 LFPM of airflow from the fans to stay at the required threshold. Please find these required conditions below.

For the MegaRAID SAS 9270-8i RAID controller, the operating (thermal and atmospheric) conditions are as follows:

Relative humidity range is 20 percent to 80 percent noncondensing.

Airflow must be at least 200 linear feet per minute (LFPM) to avoid operating the LSISAS2208 processor above the maximum ambient temperature.

Temperature range: — +10 °C to +45 °C (with BBU) — +10 °C to +55 °C (with LSIiBBU09 mode 1 through 5)

The parameters for the nonoperating (such as storage and transit) environment for these controllers are as follows:

Relative humidity range is 5 percent to 90 percent noncondensing.

Temperature range: – 40 °C to +70 °C (without BBU) — 0 °C to +45 °C (with BBU

Thank you

Our unit's are providing 240LFPM of airflow on low-fan speed setting, ambients are 18*C and chassis temp is much the same - appears they aren't going to admit this is a manufacturing fault - no silicon should ever run at this temperature at idle.

share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.