Hi all,
I recently bought a SuperMicro AOC-S3008L-L8e HBA (LSI SAS3008 based with IT firmware) and plugged it in a home made NAS build with limited air cooling to keep everything quiet.
Monitoring the SAS3008 ROC (Raid On Chip) device using storcli utility shows a rather high 65 °C / 149 °F temperature under no I/O workload, i.e. when:
* no drive plugged into card;
* with 31 °C / 88 °F measured at case inlet air location ;
* with 35 °C / 95 °F measured at case outlet air location.
Using a straightforward I/O "intensive" workload:
* with 5 SSDs plugged into card
* with a formatting process running simultaneously onto each SSD (with read/write bad block scan and no discard operation)
* with 31 °C / 88 °F measured at case inlet air location ;
* with 35 °C / 95 °F measured at case outlet air location.
To my surprise, after more than 1 hour of continuous operation, measured temperature is still 65 °C / 149°F.
I'm considering giving the card more air flow through temperature driven fan control. However, I'm unable to find consistent documentation with respect to the ROC chip recommended temperature range itself... which makes it very difficult to enslave fan speed without knowing min / max temperature points at the very least.
Everything I could find so far was related to the recommended air flow ranging from 100 to 300 LFM (Linear Feet per Minute) which won't help me either given that my fan specifications are expressed as CFM (Cubic Feet per Minute) and I have no idea of the volume of air flowing around the chip.
This would not allow me to derive a process to drive fan speed as a function of chip temperature anyway.
Many thanks in advance. Regards,
Greg.
I recently bought a SuperMicro AOC-S3008L-L8e HBA (LSI SAS3008 based with IT firmware) and plugged it in a home made NAS build with limited air cooling to keep everything quiet.
Monitoring the SAS3008 ROC (Raid On Chip) device using storcli utility shows a rather high 65 °C / 149 °F temperature under no I/O workload, i.e. when:
* no drive plugged into card;
* with 31 °C / 88 °F measured at case inlet air location ;
* with 35 °C / 95 °F measured at case outlet air location.
Using a straightforward I/O "intensive" workload:
* with 5 SSDs plugged into card
* with a formatting process running simultaneously onto each SSD (with read/write bad block scan and no discard operation)
* with 31 °C / 88 °F measured at case inlet air location ;
* with 35 °C / 95 °F measured at case outlet air location.
To my surprise, after more than 1 hour of continuous operation, measured temperature is still 65 °C / 149°F.
I'm considering giving the card more air flow through temperature driven fan control. However, I'm unable to find consistent documentation with respect to the ROC chip recommended temperature range itself... which makes it very difficult to enslave fan speed without knowing min / max temperature points at the very least.
Everything I could find so far was related to the recommended air flow ranging from 100 to 300 LFM (Linear Feet per Minute) which won't help me either given that my fan specifications are expressed as CFM (Cubic Feet per Minute) and I have no idea of the volume of air flowing around the chip.
This would not allow me to derive a process to drive fan speed as a function of chip temperature anyway.
- Does anybody has experience / documentation / reference inputs related to this SAS3008 (or similar) chip ?
- More specifically, what ROC max temperature shoud I never run over to preserve long term chip healthiness ?
- I would also be interested in temperature measurements and / or experiments if anyone of you own such a HBA.
Many thanks in advance. Regards,
Greg.