Western Digital, please, please, please stop perpetuating this dishonest, deceptive IntelliPower marketing nonsense. Even your own staff have been, and continue to be, deceived by it.
Here is the WD Green Drive Specification Sheet:
If you navigate to the bottom of the page and zoom up the fine print about 10 times, you will see the following statement:
“[IntelliPower is] a fine-tuned balance of spin speed, transfer rate and caching algorithms designed to deliver both significant power savings and solid performance. For each WD Green drive model, WD may use a different, invariable RPM.”
Note the words “invariable RPM”. This means that IntelliPower drives rotate at a fixed speed under ALL conditions. Green drives NEVER spin at 7200 RPM. They ALWAYS spin at 5400 RPM.
In reality IntelliPower is a fine-tuned balance of spindoctoring and technobabble designed to obfuscate the actual rotational speed.
Here are a few more threads that illustrate this Intellipower confusion:
Even Newegg is peddling this “5400 to 7200 RPM” nonsense:
Western Digital WD5000AAVS 500GB 5400 to 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive:
Where did this disinformation originate, and how did it become so widespread? No doubt WD has taken cynical advantage of this [Deleted]. Please stop now. I urge those people who have been duped by this IntelliPower nonsense to demand a refund.
BTW, since the speed is invariable, there is no legitimate reason for WD’s drive to report a speed of 0 in word 217 (Nominal media rotation rate) of the ATA Identify Device information block. Instead the drive should report its actual, invariable speed, just like WD’s other models.
I invite GaryF to run a HD Tune read benchmark against the drive. If he could then upload the graph, I will be able to determine the drive’s actual RPM. I would also very much like to see a photo of the packaging.
Here is an example for a Green drive:
Notice that the band of access time data points is about 11 msec wide. This corresponds to the time required for one complete revolution at 5400 RPM. The width for a 7200 RPM drive would be 8.3ms.