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z/VM: CP Commands and Utilities Reference - z/VM - IBM

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HALT<br />

HALT<br />

►►<br />

HALT<br />

Authorization<br />

Purpose<br />

rdev<br />

Oper<strong>and</strong>s<br />

Usage Notes<br />

Responses<br />

Privilege Class: A<br />

Use HALT to end execution of an active channel program.<br />

rdev<br />

is the device number of the real device to be stopped.<br />

1. Attention: Use this comm<strong>and</strong> only in extreme cases <strong>and</strong> after careful<br />

consideration. Indiscriminate use of this comm<strong>and</strong> may cause unwanted results.<br />

2. After issuing HALT, enter the QUERY (real devices) comm<strong>and</strong> to determine the<br />

status of the device. If the device requires intervention, you should make the<br />

device ready.<br />

Response 1:<br />

HALT INITIATED TO type rdev<br />

indicates that the system has accepted the comm<strong>and</strong> <strong>and</strong> initiated action to halt the<br />

device.<br />

Response 2:<br />

458 z/<strong>VM</strong>: <strong>CP</strong> <strong>Comm<strong>and</strong>s</strong> <strong>and</strong> <strong>Utilities</strong> <strong>Reference</strong><br />

HALT NOT INITIATED BECAUSE type rdev IS NOT ACTIVE<br />

indicates that a HALT was issued to an idle device <strong>and</strong> that the system has not<br />

accepted the comm<strong>and</strong>.<br />

type<br />

identifies the device halted. The possible type values are:<br />

Type Meaning<br />

DASD Direct access storage device<br />

F<strong>CP</strong> SCSI device adapter<br />

TAPE Magnetic tape<br />

RDR Card reader<br />

PRT Printer<br />

PUN Card punch<br />

GRAF Display device<br />

CONS Console<br />

CTCA Channel-to-channel adapter<br />

OSA Open Systems Adapter<br />

CTLR 37xx Communications Controller<br />

MSC Mass Storage Controller<br />

►◄

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