Edited by silentcreek at 2014-10-18 15:09 |
I tested 3 different 2.5" USB harddrives with my headless Banana Pi server setup and my experience is this:
I have two Toshiba and one Western Digital drive that I tried on the Banana Pi. Unfortunately, my Western Digital drive does not work reliably without an additional powered USB hub. It's a WD Elements 750GB USB3.0 harddrive. Sometimes the BPi will power up with it plugged in, but a lot of times it just won't (I'm using a 5V/2A power supply as recommended). And even if it does power up, after a longer period I saw errors with the USB connection being reset. My guess is, that this particular drive is a 7200rpm drive which needs more power to spin up (I suspect so, because it's also significantly louder than all of my other 2.5" drives).
The two Toshiba drives I tested are a Toshiba Stor.e Basics 1TB 2.5" USB3.0 and a Toshiba Stor.e Slim for Mac 500GB 2.5" USB3.0. They both work absolutely fine without additional power supply. Two harddrives at the same time don't work for me, but one harddrive and one extra USB flash drive work.
1.) You have to make your own tests to be sure, if your specific drive works without additional power supply. Not all drives work.
2.) If you want to use two external USB hard drives, you will need a seperate power supply (e.g. powered hub).
3.) If you are planning to buy a new harddrive for your BPi, I'd grab an internal 2.5" drive instead of a USB drive. But if you want two use drives you already own (like me), just give it a try.