DFS0546I LONG BUSY ADS CLOSED. AREA=xxxxxxxx,ADS=yyyyyyyy, UNIT=nnnn

Explanation

A long busy condition persisted long enough for the maximum CI (1000 CIs per AREA) limit to be exceeded. When this happens, MADSIOT function issues an internal STOP ADS command. The STOP ADS process calls Media Manager DISCONNECT function under XFP TCB and if DASD is still in long busy condition, the DISCONNECT function is suspended until the long busy condition is relieved or IOTIMING is reached.

During the suspension, all ITASKs including OTHREAD, CHKPT, and FP commands under XFP TCB are not serviced. To reduce the impact, this message can be used by automated operator to force the long I/O device offline.