Options for HOTIO recovery

The parameters (DFLT110, DFLT111, DFLT112, SDFT110, SDFT111, and SDFT112) that are used to specify recovery actions have default options defined in the HIDT. Each of these parameters has a default option for non-recursive hot I/O conditions and a default option for recursive hot I/O conditions. You can override one or both options.

For example, if you want to override the DFLT111 non-recursive default option (CHPK) so that the recovery action would have to be obtained from the operator, code: DFLT111=(OPER,). Note that the options are enclosed in parentheses and separated by a comma.

The following options can be specified for both non-recursive and recursive hot I/O conditions. Code the options with the DFLT110, DFLT111, DFLT112, SDFT110, SDFT111, and SDFT112 parameters, and use the following format:

     Parameter=(a,b)

a: the action to be taken for a non-recursive hot I/O condition
b: the action to be taken for a recursive hot I/O condition.

Option	Meaning and Use
BOX	Specifies that the device is to be forced offline.
CHPF	Specifies that the channel path over which the last interrupt for the hot device was received is to be forced offline.
CHPK	Specifies that channel path recovery is to be initiated for the channel path over which the last interrupt for the hot device was received. If successful, the channel path is to remain online. Note: If a device on the channel path undergoing channel path recovery belongs to a device class specified in the BOX_LP=(...) parameter, then that device may become boxed instead of undergoing channel path recovery.
OPER	Specifies that the recovery action is to be obtained from the operator. Note: There are conditions when the message issued to prompt the operator will be issued using the Disabled Console Communication Facility (DCCF). IBM® suggests that you do not choose this option unless the installation can properly handle responding to messages that were issued using DCCF.
CUK	Specifies that control unit recovery is to be initiated for the channel path over which the last interrupt for the hot device was received. Note: The CUK option is valid only for IBM ESCON® channel paths (SDFT110, SDFT111, and SDFT112).