I have a G-Tech G-RAID 4TB USB3.0 / Firewire connected to an iMAC using Firewire. Since the introduction of El Capitan (and now the same happens with Sierra also), after a while of correct use, the drive becomes un-usable and hangs. It remains mounted with Finder and Disk Utility, but it is impossible to read any data off it. Once in that state, Ejecting it is never successful, and a Force Eject is sometimes successful.
This is an old problem, which I I expected to have been solved a long time ago with El-Capitan updates, and with Sierra, but it seems not, at least in my case.
This is not the problem of the HDD ‘self-dismounting’ randomly.
Any suggestions?
Thanks,
Tim
