The procedure I used to turn off my Western Digital, My Book, Essential that is connected to the 722 was to unplug the USB cable to the WD hard drive. The WD would turn off and it had no adverse affect on the operation of the 722. However when I attempted to disconnect the USB cable after the 221 was turned off, it made the 211 reboot and then it had to go through the download of the guide. The same thing happened when I turned off the 221 and then unplugged the power cord from the 211. The screen said the hard drive was unplugged and the 221 had to be started. After I turned it back on, the guide started to download. The DVR function is intact and is working but I have not recorded anything to the hard drive.
It looks like the WD will have to stay on all of the time. This is not good.
It may be necessary to purchase the WD hard drive that is recommended by Dish. Does anyone know if it (or the other hard drive recommended by Dish )has a manual switch to turn it off and what the affect is on the 221?
I would recommend buying one of the drives designed for 24/7 high temp use like in surveillance equipment and then leave it on 24/7.
Look for the Seagate model SV35.3 - it is specifically designed for multiple video streams and high temperature operation. then put it in a reliable external enclosure.
Newegg.com - Seagate SV35.3 ST3750330SV 750GB 7200 RPM 32MB Cache SATA 3.0Gb/s Hard Drive - Internal Hard Drives
They are not like the FreeAgent drives that have a sleep mode.