A channel queued request (cqr) failed because it timed out.
One possible reason for this error is that a request did not
complete within the timeout interval specified for the DASD.
The timeout interval is set as the value of the 'timeout' sysfs
attribute of a DASD. A value of 0 disables the timeout function.
The timeout function can be used; for example, by mirroring setups;
to quickly process a request queue for a DASD that has become unavailable.
User response
Check the message log for previous related error messages. Verify
that the storage server and the connection from host to storage
server are operational. If the 'timeout' sysfs attribute of the
DASD has been set to a value other than 0, verify that this
setting is intentional and change it if required.