[buug] lvm issue

[John de la Garza]

I had an external device hooked up to my box and it got removed
without first deactivating the lvm volume group.

Now, I can't get the logical volumes or vol group out of the kernel.

I am trying to run vgscan but get this:

root at darkstar:~# vgscan
  Reading all physical volumes.  This may take a while...
  /dev/jj-internal/usr: read failed after 0 of 4096 at 8589869056:
Input/output error
  /dev/jj-internal/usr: read failed after 0 of 4096 at 0: Input/output error


I'd like to be able to fix this with out rebooting.  Anyone know how
to clear these unreadable devices out?