Hello, >> I don't think it is a power issue. >> I'm using on desktop PC on usb2 port with just a simple cable but the >> disk (WD5000LPVX) only consumes 1.4 Watts (read/write) and it is >> stable on Windows. > > http://www.wdc.com/wdproducts/library/SpecSheet/ENG/2879-771437.pdf > > Says it uses 1.4 Watts "average", it has a rated peak power > consumption of 1A, and a USB2 port can deliver only 0.5 A, so > its rate maximum is twice as much as the USB2 port's maximum. I think that peak only can happens when the disk starts. > Disconnection issues like you are seeing are typical for drawing > too much power from the port. Using uas as the dmesg shows you > are will allow us to send more commands to the disk at once > (which is a good thing, it is faster) and as such will increase > power consumption. Maybe the too much commands freeze the chip. > > Does the enclosure you are using have the option to provide > external power, and have you tested things that way ? > Unfortunately no option for that: http://www.delock.com/produkte/G_42523/merkmale/1.html?setLanguage=en Today I wanted to buy a USB Y cable to double the available power but I didn't have luck with local shops. I need more time to exclude the possibility of this power issue. (But I have to say again, it is stable on Windows.) Br, Laszlo -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
