Following up. I checked two classes of servers: R730xd - rear disk 58°C R740xd2 - rear disk 33°C
That's a huge difference. The fan speeds were similar, between 10,300 and 11,160 rpm. I don't think this accounts for the difference in temperature. Perhaps the airflow of the system has been improved in the R740. But there is one significant difference: in the R740xd2, the rear disks are SSDs, where the R730xd have spinning disks. Cheers, Onno > Op 10 okt. 2019, om 20:19 heeft Onno Zweers <[email protected]> het > volgende geschreven: > > Thanks everyone for the very useful answers. I had a quick look: > > [root@shark5 ~]# for disk in $(smartctl --scan | egrep -o megaraid,[0-9]+) ; > do echo -n "$disk - " ; smartctl -a /dev/sdb -d $disk | grep 'Current Drive > Temperature' ; done > megaraid,0 - Current Drive Temperature: 31 C > megaraid,1 - Current Drive Temperature: 32 C > megaraid,2 - Current Drive Temperature: 32 C > megaraid,3 - Current Drive Temperature: 31 C > megaraid,4 - Current Drive Temperature: 32 C > megaraid,5 - Current Drive Temperature: 30 C > megaraid,6 - Current Drive Temperature: 32 C > megaraid,7 - Current Drive Temperature: 32 C > megaraid,8 - Current Drive Temperature: 31 C > megaraid,9 - Current Drive Temperature: 32 C > megaraid,10 - Current Drive Temperature: 34 C > megaraid,11 - Current Drive Temperature: 32 C > megaraid,12 - Current Drive Temperature: 56 C > megaraid,13 - Current Drive Temperature: 58 C > megaraid,14 - Current Drive Temperature: 44 C > megaraid,15 - Current Drive Temperature: 45 C > megaraid,16 - Current Drive Temperature: 47 C > megaraid,17 - Current Drive Temperature: 51 C > > 58 degrees C seems very hot to me, and indeed disks 12 and 13 are in the back > of the machine. We have lots of these servers and we've noticed that these > rear disks fail rather often. The 2 disks in the rear have as many failures > as the 12 disks in front. I guess the next step would be to check at which > speed the fans blowing. > > Cheers, > Onno > > _______________________________________________ > Linux-PowerEdge mailing list > [email protected] > https://lists.us.dell.com/mailman/listinfo/linux-poweredge
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