devfs and hot unplugging firewire device

John-Mark Gurney gurney_j at
Tue Sep 19 09:04:52 PDT 2006

M. L. Dodson wrote this message on Tue, Sep 19, 2006 at 10:05 -0500:
> When I finished a dump/restore, I just pulled the cable (the
> firewire disk partitions were not mounted).  When I plugged in the

The problem is that the old devices still are open for writing.. If
you were to umount -f the old fs, most likely, the devices would
wither away, and things would be back to normal...

I hope you were fsync'ing the files before you unmounted the disk
to ensure that the file was completely written to disk, otherwise
you could end up w/ the an incomplete file...

> My question: Should I be doing something to signal devfs I'm going
> to unplug a device so it won't get confused when I plug in another
> similar, but not the same, device?  camcontrol commands like
> "camcontrol eject <options>" and "camcontrol rescan all" seemed to
> not have the results I expected.  What's going on here?

umount the file system...  I unplug firewire drives that don't have
mounted filesystems, and haven't had an issue with it...

  John-Mark Gurney				Voice: +1 415 225 5579

     "All that I will do, has been done, All that I have, has not."

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