Re: external (USB) disk errors causing hangs and 100% cpu core usage
On Mon, 27 Jul 2015 23:40:10 -0400
Gary Dale <garydale@torfree.net> wrote:
> On 27/07/15 10:08 PM, Celejar wrote:
> > Hi,
> >
> > I have a fairly new external USB disk that frequently throws errors.
> > When these occur, the disk becomes partially or totally inaccessible.
> > Even worse, when I try to umount it, the umount hangs indefinitely,
> > using 100% of one of my cpu cores. I haven't yet found any way to
> > recover short of hard booting (long press of the power button) the
> > system (soft booting - halt, reboot, poweroff - hang). smart seems to
...
> I've had similar problems with USB3 drives which seemed to crop up while
> reading the disk. They were OK on writing. It also required a reboot to
> correct.
>
> I still haven't resolved it - it's on a headless machine in a remote
> location so I wanted to try a BIOS upgrade next time I am out that way.
> My workaround was to connect the drives to USB2 ports instead of USB3.
> Not ideal but it's working for now.
The drive is USB3, but all my ports are only USB2 to begin with. What
really bugs me is the 100% CPU utilization. Is this considered a driver
bug - shouldn't the driver be able to recover more gracefully for any
sort of real world error condition?
Celejar
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