April 1, 1981
CTCA vaddr DROP FROM userid vaddr
is the response if the device detached was a virtual CTCA connected
(via the COUPLE command) to another CTCA on the virtual machine
specified by the userid. This response is always followed by the
response:
CTCA vaddr DETACHED
66 VM/370 Operator's Guide
DETACH CHANNEL Use the DETACH CHANNEL co.mand to detach a dedicated channel fro. a user
when the channel path is no longer required for virtual machine
operations. If DETACH CHANNEL is issued prior to the normal completion
of I/O activities on the dedicated channel path, those activities are
terminated. The format of the DETACH CHANNEL command is:
DETach CHANnel c [From] {US;rid} CHANIEL c FROM is the real address of the channel that is to be }
specifies the user identification of the virtual machine from which the channel is to be detached. If the optional keyword FROM is omitted, the userid cannot be FROM, FRO, FR, or F. If
the DETACH CHAIIEL command is invoked by a class B user to
detach a channel from his own machine, an asterisk (*) may be used. !2!!: A DETACH CHAINEL command followed immediately by an
ATTACH CHANIEL command may result in a message stating that
the specified channel is in use. DETACH CHANNEL processing
causes I/O to be asynchronously scheduled for each dedicated
device; DETACH CHANNEL processing does not for all I/O to
complete prior to returning control ,to the: terminal operator. A subsequent ATTACH CHANNEL command may fail due to this timing situation.
CHANNEL c DETACHED BY operator
is sent to the user from whose virtual machine the channel is
being detached. CHANIEL c DETACHED userid
is sent to the operator issuing the co.mand. CHANNEL c DETACHED userid BY operator
is sent to the primary system operator if he did not issue the
command. Section 3. CP Commands 67
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