6027-378 [I] I/O still in progress near sector number on disk diskName.
Explanation
The mmfsd daemon is attempting to terminate,
but cannot because data structures in the daemon shared segment may
still be referenced by kernel code. In particular, the daemon has
started an I/O that has not yet completed. It is unsafe for the daemon
to terminate until the I/O completes, because of asynchronous activity
in the device driver that will access data structures belonging to
the daemon.
User response
Either wait for the I/O operation to time out, or
issue a device-dependent command to terminate the I/O.