All verified channel paths to the device have become non-operational.
Any other paths to the device have previously been identified as not usable.
The DASD device driver suspends I/O operations and queues I/O requests
for this device until at least one channel path becomes operational
again.
User response
Ensure that each channel path to the device has been set up correctly
and that the related physical cable connections are in place.
Set all paths to the device offline and online again to repeat the path
verification. Alternatively, set the device offline and online again to
verify all available paths for this device.
If this problem persists, gather Linux debug data and report the problem
to your support organization.