dasd-eckd.d2af02 <bus ID of the DASD>: FORMAT 0 - Channel requested ... <reason code>
Explanation
This is an operating system independent message that is issued by the
storage system. The possible reason codes indicate the following problems:
00 No Message.
01 The channel has requested unit check sense data.
02 The channel has requested retry and retry is exhausted.
03 A SA Check-2 error has occurred. This sense is presented with
Equipment Check.
04 The channel has requested retry and retry is not possible.
User response
For more information see the documentation of your storage system.