IEA516W   MODIFY SUBCHANNEL FAILED FOR DEVICE NUMBER dev

Explanation

During system initialization, the Modify Subchannel (MSCH) instruction failed while the system was trying to enable a device.

In the message text:
dev
The device number.

System action

The system ends initialization. The system enters nonrestartable wait state X'0B1' with reason code X'004'.

System programmer response

See the system programmer response for wait state X'0B1'.

Source

Input/output supervisor (IOS)

Module

IOSIOFR