In the case of virtual DASD volumes associated with the 3850 Mass Storage System, the ATTACH command allows 3330V devices to be
attached to a virtual machine without requ1r1ng a volume to be mounted. This is necessary because staging of cylinder 0 on a
virtual volume is not accomplished until a MSC mount order is issued associating the ?irtual unit address with a volume serial.
Even if the mount order was issued prior to the ATTACH, the host
system may change the data staged on a virtual volume by issuing
another MSC mount order.
9. If R/O is specified with a range of addresses or with multiple
addresses, this operand apFlies only to DASD addresses. The R/O operand is ignored for all other device addresses specified on the
command line. 10. Do not attach virtual 3330 volumes (3330V) to the SYSTEft; 3330V cannot be used for minidisks, CP residence, paging, or spooling
activity. Messages are sent to the user, the operator who issued the command (if
different fro. the user), and the primary system operator (if different
from the operator who issued the command), notifying them that the
ATTACH was successful.
type raddr ATTACHED
raddr ••• ATTACHED
raddr-raddr ATTACHED
Depending upon the form used for the co •• and line, the appropriate message indicates to the user the real device or devices attached
to his virtual machine. If multiple addresses or a range of
addresses are specified, the device type is not displayed.
type raddr ATTACHED TO userid vaddr
type raddr ATTACHED TO SYSTEM volid
raddr ••• ATTACHED TO userid
raddr-raddr ATTACHED TO userid
Depending on the form used by the class B operator for command line
entry, the appropriate response indicates the real device(s) that
are attached to CP or a specified user's virtual machine (and, if
appropriate, the virtual address of the device). If multiple
addresses or a range of addresses are specified, the device type is
not displayed.
type raddr ATTACH TO SYSTEM volid BY userid
-- or --
type raddr ATTACH TO userid vaddr BY userid
is the response to the primary system operator (if he did not issue
the co.mand) indicating that the real device has been attached
either to the specified user's machine at virtual address vaddr or
to the CP system by the specified class Buser. 48 VM/370 operator's Guide
In the above responses, "type" is one of the following: DASD TAPE
LINE
RDR
PRT PUN GRAF CONS CTCA
CTLR DEV Direct access storage device Magnetic tape
Communication line
Card reader
Line printer
Card punch
Graphics device
Console
Channel-to-channel adapter 3104 or 3705 Communications Controller
Any other device Section 3. CP Commands 49
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