Re: Shutdown preventing umount

Andi Kleen
2020-03-16T03:37:23Z

On Mon, Mar 16, 2020 at 01:03:42PM +1100, Dave Chinner wrote:
> On Sat, Mar 14, 2020 at 06:31:10AM -0700, Andi Kleen wrote:
> >
> > Hi,
> >
> > I had a cable problem on a USB connected XFS file system, triggering
> > some IO errors, and the result was that any access to the mount point
> > resulted in EIO. This prevented unmounting the file system to recover
> > from the problem.
>
> Full dmesg output, please.

http://www.firstfloor.org/~andi/dmesg-xfs-umount

> >
> > XFS (...): log I/O error -5
> >
> > scsi 7:0:0:0: rejecting I/O to dead device
>
> Where is unmount stuck? 'echo w > /proc/sysrq-trigger' output if it
> is hung, 'echo l > /proc/sysrq-trigger' if it is spinning, please?

It's not stuck. It always errored out with EIO.

-Andi