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

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The following response is displayed when you enter SET CACHEFW ON <strong>and</strong> is<br />

repeated for each unique subsystem identified by the devices specified on the<br />

comm<strong>and</strong> line.<br />

rdev Cache fast write function has been activated.<br />

If the originator of the comm<strong>and</strong> is not the system operator, the following response<br />

is issued to the system operator <strong>and</strong> is also repeated for each unique subsystem<br />

identified by the devices specified on the comm<strong>and</strong> line.<br />

rdev Cache fast write function was activated by userid.<br />

rdev<br />

is the real device number of one of the specified devices in a subsystem for<br />

which the cache fast write function has been activated.<br />

userid<br />

is the ID of the user who issued the comm<strong>and</strong>.<br />

Response 2:<br />

Immediate Response If you enter the SET CACHEFW OFF comm<strong>and</strong> <strong>and</strong> the<br />

cache fast write function is deactivated immediately, the following response is<br />

displayed. This response is repeated for each unique subsystem identified by the<br />

devices specified on the comm<strong>and</strong> line.<br />

rdev Cache fast write function has been deactivated.<br />

rdev<br />

is the real device number of one of the specified devices in a subsystem for<br />

which the cache fast write function has been deactivated.<br />

Delayed Response If the cache fast write function is not deactivated immediately,<br />

the following response is issued:<br />

Comm<strong>and</strong> started: SET CACHEFW OFF rdev.<br />

When the cache fast write function is deactivated, the following responses are<br />

issued:<br />

rdev Cache fast write function has been deactivated.<br />

Under certain circumstances, it is possible that a cache storage subsystem does<br />

not notify <strong>CP</strong> when it has deactivated the cache fast write function. When this<br />

occurs, the appropriate comm<strong>and</strong> response cannot be generated. Under these<br />

circumstances, comm<strong>and</strong> processing is ended after generating the following<br />

response:<br />

Comm<strong>and</strong> results lost: SET CACHEFW OFF rdev.<br />

In this case, the QUERY CACHEFW comm<strong>and</strong> can be issued to determine the<br />

state of the cache fast write function.<br />

If errors occur during the asynchronous processing of the comm<strong>and</strong> that prevent<br />

the successful completion of the comm<strong>and</strong>, the following response is displayed:<br />

Comm<strong>and</strong> failed: SET CACHEFW OFF rdev.<br />

SET CACHEFW<br />

rdev<br />

is the real device number of one of the specified devices in a subsystem for<br />

which the cache fast write function has been deactivated.<br />

Response to System Operator If the originator of the comm<strong>and</strong> is not the system<br />

operator, the following response is issued to the system operator when the cache<br />

Chapter 2. <strong>CP</strong> <strong>Comm<strong>and</strong>s</strong> 1201

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