bodhi78 wrote" ...when some of these WD Green drives are used in a RAID configuration such as in a Netgear Network Attached Storage (NAS), the Load Cycle Count (LCC) goes up rapidly.
Green drives are designed to save power, so they shut down as soon as there is no activity for a pre-defined period. Since 8 seconds is an eternity in a serious computer application, that seems like a reasonable choice to be a default.
The manufacture specification for maximum LCC is somewhere between 300,000 to 600,000. In some cases, the rate of increase would exceed that maximum LCC in about 2 years or less."
For a 3.5" drive those kind of LCC numbers are atypical, that's the range for 2.5" drives. The last time I saw LCC specs on Blue and Black drives they were way lower. By looking around I found that those are the numbers quoted for the million hour MTBF Caviar RAID edition drives which were introduced about 5 years ago.
Power parameters are definable, and LCC is the finger of mortality. Installing Green drives in an application without adjusting the power management parameters to suit that application would be the integrator's responsibility. Netgear is not shipping WD Green drives, so they are not at fault.
Netgear has made a utility available for users to fix the problem.
It's the users trying to save power who are installing WD drives in Netgear cabinets, and the utility changes the defaults to parameters that are more suitable for the application. I don't know what Netgear is supplying but Synology supplies WDIDLE3 1.03 and recommends setting a value of 300 seconds.
I don't know if WD 500GB models have this problem or not, though.
The only 500GB of concern is the AADS, no others are identified at WD's site as having an issue (and that correlates with Googled complaints). WD has info in their FAQ and a utility to help.http://wdc.custhelp.com/cgi-bin/wdc....p?p_faqid=5357http://wdc.custhelp.com/cgi-bin/wdc....p?p_faqid=3263WD drives are designed to reduce power consumption, in part by positioning the heads in a park position (unloading the heads) and turning off unnecessary electronics, resulting in substantial power savings. WD defines this mode as Idle 3.
Some utilities, operating systems, and applications, such as some implementations of Linux, for example, are not optimized for low power storage devices and can cause our drives to wake up at a higher rate than normal. This effectively negates the power-saving advantages of low-power drives, such as WD GreenPower models, and artificially increases the number of load-unload cycles. Although the increase in load/unload cycles is within design margins (drive has been validated to 1 million load/unload cycles without issue) a balance between life of product, logging requirements, and low power consumption can be achieved depending on what is critical to the system. Present SMART normalized values have not been re-normalized to 1 million cycles so advisory reporting on this attribute does not mean failure of product.
The WDIDLE3.EXE utility was originally developed for the RE series, and lets the user disable the timer, or set it to any value between 8 and 300 seconds.
FWIW, my original reservations about the Green drives were not the power saving techniques, but the sector size. Drive vendors have been planning to migrate from 512 to 4096 byte physical sectors for a long time. On drives that have 4096 byte sectors, odd-boundary 512-byte transfers require manipulation. Fortunately, it turns out that only the EARS Green drives are "Advanced Format".
OS vendors have had years to prepare for this shift but in typical ostrich fashion have chosen to ignore it. Read http://hothardware.com/Articles/WDs-...Pay-Attention/
for a wakeup call.