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 in the 'timeout'
sysfs attribute of the DASD. 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. Ensure that the sysfs attribute
'timeout' of the DASD device has been is set to a value sufficiently
large, such that regular latency does not lead to timeouts.