Some (most) SSD's don't have a temperature sensor. The result is that temperatures can be reported that are just wrong. Like 127 degrees, or -1. For servers this can be a problem because the server can't be sure the sensor is defective or whether there is a real problem. So it will spin the fans at maximum speed in order to try and cool the disk. That increases the power usage slightly and increases the noise level drastically. Within a DC that may not be a problem (if you have proper hearing protection)
I've tried 3 SSDs and 2 happened to work fine:
60GB OCZ Vertex 2 (OCZSSD2-2VTXE60G) - broken (firmware 1.33)
60GB Corsair Force (CSSD-F60GB2-BRKT) - fine
60GB Corsair Nova (CSSD-V60GB2) - fine
Some disks don't have a sensor but report a fixed temperature. That also works. Intel's 710 SSD range seems to have an actual temperature sensor.
So if you plan on using such a consumer grade SSD for a solution that bases fan speed on disk temperatures (like servers) this can help you figure out just slightly better what to buy, and what not to buy.
2011-10-18 update:
OCZ vertex 3 also does not have a (working) temperature sensor according to smart
I've tried 3 SSDs and 2 happened to work fine:
60GB OCZ Vertex 2 (OCZSSD2-2VTXE60G) - broken (firmware 1.33)
60GB Corsair Force (CSSD-F60GB2-BRKT) - fine
60GB Corsair Nova (CSSD-V60GB2) - fine
Some disks don't have a sensor but report a fixed temperature. That also works. Intel's 710 SSD range seems to have an actual temperature sensor.
So if you plan on using such a consumer grade SSD for a solution that bases fan speed on disk temperatures (like servers) this can help you figure out just slightly better what to buy, and what not to buy.
2011-10-18 update:
OCZ vertex 3 also does not have a (working) temperature sensor according to smart
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