RPM is irrelevant

Seriously. How many RPM do you expect from a FlashRAM drive, for example?

Tell me the average and maximum latency (aka "access speed") and the average and minimum transfer rate (both the reading speed and the writing speed, please. then I will have all the numbers I need to determine if HDD "A" is below, equal, or superior to HDD "B" for data storage uses. Also I want the MTBF; if I have to replace the drive every 2 years on average, vs. every 4 years for another brand, I need to know that.

If you want to tell me the average, maximum, and minimum power consumption as well, that will be nice (and tell me the total number of watts generated/wasted as heat, if you like), and I'll factor them in as appropriate.

But if I don't get the *performance* specs when designing a storage system, I'll go to a drive manufacturer who *will* tell me.