Hi all,
Recently, I purchased a Supermicro SC216 chassis w/BPN-SAS2-216EL2 backplane. 1x LSI 9207-i8 HBA in IT-Mode is connected to the backplane. I installed the following disks and tested the drives for S.M.A.R.T and TEMP values.
12x Seagate ST1200MM0007 (1.2TB Enterprise Performance 10K v7)
10x HGST HUC109090CSS600 900GB 10K RPM SAS 2.5" HDD.
Before I start I should say that I exchanged the 3x original San Ace 80 fans with Noctua NF-A8 PWM (Chromax) and ARCTIC F8 PWM PST CO. Please do not judge the exchange as 'ridiculous' because of the much lower airflow, static pressure, or much lower rpm's. The 5EUR ARCTIC's are just doing fine and the following temp overview will show that an exchange has nothing to do with the 'weird issue'.
S.M.A.R.T values all without any issues. Super nice. But looking at the temps of all of the Seagate drives started to be a little bit 'worrisome'. All of the 12X Seagate drives showed temps between 60C and 74C just lying around and not doing any read/write jobs. The room temperature in the room was ~26C. The 10x HGST were installed beside the 12x Seagate drives. I also installed just the Seagates drives without the HGST drives. Same temps, no changes. I separated the 12x Seagate drives from each other with one drive slot only filled with caddies & dummies between them. I installed them in groups of 2 or 4 drives. I installed them all in the middle, all on the right, all on the left. The drives always showed never the same temps, but always between 60C and 74C. The HGST drives stayed all very cool between 35-43C. I think we can agree that the temps fro the Seagate drives were way to high and 10+C above hardcoded Trip Temperature of 50C. The backplane gave no warning at all. No beep, no LED indication that something was wrong. I also want to mention I tested with the San Ace 80 with 1-2C lower temps than the Noctua"s and ARCTIC's.
I measure the temps with the following command: smartctl -A /dev/sdx | grep -i temperature (x for each drive [a-s]).
Today I decided to test again, but only with 8x Seagate installed. With and without the HGST drives with surprising results. While the room temperature was 29C today, the 8x (!!!) Seagate showed temps between 49C and 55C only. Oooops. I repeated all the test from the day before with the same fans, the same formations of where the drives have been installed. I always had temps between 49C and 55C. How could that happen with 3C higher room temperature, same HBA, same backplane, same fans? The only difference was ... 8x vs 12x Seagate drives. So I tested it again with 12x of the Seagate drives and temps skyrocketed again to 64C and 77C in the peak!!!!!! Wxx ..... ??!! Switched back to 8x of the Seagate files and the temps slowly came down to 50-56C again. I did not test even less Seagate drives (6x or 4x). Needless to say the HGST drives stayed with the same temp all the time during the testing.
So my question is, how can the number of Seagate drives installed have such an impact on the temperature of the drives? As the HGST always kept their temperature it might have something to do with the Seagate drives or their firmware or ..... I don't know. Would be nice to hear some thoughts from you guys.
Thank you in advance.
Mike
PS: Just added a screenshot from the tests with 8x Seagate drives only. Forgot to make screenshots from 12x Seagate drives installed.
Recently, I purchased a Supermicro SC216 chassis w/BPN-SAS2-216EL2 backplane. 1x LSI 9207-i8 HBA in IT-Mode is connected to the backplane. I installed the following disks and tested the drives for S.M.A.R.T and TEMP values.
12x Seagate ST1200MM0007 (1.2TB Enterprise Performance 10K v7)
10x HGST HUC109090CSS600 900GB 10K RPM SAS 2.5" HDD.
Before I start I should say that I exchanged the 3x original San Ace 80 fans with Noctua NF-A8 PWM (Chromax) and ARCTIC F8 PWM PST CO. Please do not judge the exchange as 'ridiculous' because of the much lower airflow, static pressure, or much lower rpm's. The 5EUR ARCTIC's are just doing fine and the following temp overview will show that an exchange has nothing to do with the 'weird issue'.
S.M.A.R.T values all without any issues. Super nice. But looking at the temps of all of the Seagate drives started to be a little bit 'worrisome'. All of the 12X Seagate drives showed temps between 60C and 74C just lying around and not doing any read/write jobs. The room temperature in the room was ~26C. The 10x HGST were installed beside the 12x Seagate drives. I also installed just the Seagates drives without the HGST drives. Same temps, no changes. I separated the 12x Seagate drives from each other with one drive slot only filled with caddies & dummies between them. I installed them in groups of 2 or 4 drives. I installed them all in the middle, all on the right, all on the left. The drives always showed never the same temps, but always between 60C and 74C. The HGST drives stayed all very cool between 35-43C. I think we can agree that the temps fro the Seagate drives were way to high and 10+C above hardcoded Trip Temperature of 50C. The backplane gave no warning at all. No beep, no LED indication that something was wrong. I also want to mention I tested with the San Ace 80 with 1-2C lower temps than the Noctua"s and ARCTIC's.
I measure the temps with the following command: smartctl -A /dev/sdx | grep -i temperature (x for each drive [a-s]).
Today I decided to test again, but only with 8x Seagate installed. With and without the HGST drives with surprising results. While the room temperature was 29C today, the 8x (!!!) Seagate showed temps between 49C and 55C only. Oooops. I repeated all the test from the day before with the same fans, the same formations of where the drives have been installed. I always had temps between 49C and 55C. How could that happen with 3C higher room temperature, same HBA, same backplane, same fans? The only difference was ... 8x vs 12x Seagate drives. So I tested it again with 12x of the Seagate drives and temps skyrocketed again to 64C and 77C in the peak!!!!!! Wxx ..... ??!! Switched back to 8x of the Seagate files and the temps slowly came down to 50-56C again. I did not test even less Seagate drives (6x or 4x). Needless to say the HGST drives stayed with the same temp all the time during the testing.
So my question is, how can the number of Seagate drives installed have such an impact on the temperature of the drives? As the HGST always kept their temperature it might have something to do with the Seagate drives or their firmware or ..... I don't know. Would be nice to hear some thoughts from you guys.
Thank you in advance.
Mike
PS: Just added a screenshot from the tests with 8x Seagate drives only. Forgot to make screenshots from 12x Seagate drives installed.
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