On 3 August 2015 at 15:01, Paul Mather <freebsd-li...@gromit.dlib.vt.edu> wrote: > On Aug 2, 2015, at 9:34 PM, Adam McDougall <mcdou...@egr.msu.edu> wrote: > >> On 08/02/2015 21:22, Paul Mather wrote: >>> I have a 4TB external USB drive (Western Digital My Book 1230) that I am >>> trying to use under FreeBSD/amd64 10.2 (10.2-PRERELEASE #0 r286052: Wed Jul >>> 29 20:59:39 EDT 2015). This system has a MSI 760GMA-P34 (FX) motherboard. >>> >>> The drive probes unreliably when plugged in to a USB 3 port. It reliably >>> probes when plugged into a USB 2 port. However, it works in neither cases. >>> Attempting to dd from the drive results in a "dd: /dev/da0: Invalid >>> argument".
FYI: I had been experiencing the same with a 2 TB WD MyBook on OS X (Mavericks). The drive was being used for Time Machine backups, but it would at irregular intervals it would just 'disconnect' itself. My guess is that there's a firmware problem in the USB3 chip in those drives. After trying to get the issue fixed for almost half a year I returned it and replaced it by a Seagate, which has been working flawlessly ever since. I'm just saying, perhaps the problem isn't with FreeBSD but with the drive. Cheers. _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
