I have problem with WD PIDrive 314GB. Lot of time happens that pidrive beeps. Something like this: 3x beeps - 1sec delay - 3x beeps - 1sec delay - 3x beeps and then is working normally.
I had berryboot on mmc card and system raspbian jessie little installed on pidrive.
Also I tried to have only system installed on mmc card and pidrive is only apache html folder, or owncloud file storage.
I tested with 2x 5V/2A adapters and RPi2B. All situations have random beeps like described above:
- I used usb2 cable (tested longer/shorter) to rpi with max_usb_current=1 settings
- Than, I bought original pidrive cable, Where power going directly to pidrive from adapter and between pidrive and rpi is usb data cable only.
I measured voltage (±5.1V) and current (RPi (only lan cable plug-in with lighweight rasbian linux) + pidrive) is from 0.4 -0.8A (depend on load). During beeps current is going from 0.4 to 0.8A and than after last beeps going back to 0.4A.
Does anybody know, Where problem could be?
I appreciate any help.