Page of GC20-1806-9 As Updated April 1, 1981 by TNL GN25-0834 [TO] SYSTEM specifies, along with vOlid, that the DASD made available to CP for accessing users'
paging and spooling functions.
device is to be
disks and/or for[AS] volid is the volume label of the volume on the raaar being attached.
This operand has the following meanings when used with the
various forms of the ATTACH command:• When used to attach an available raddr to a userid and the
raddr is a3330V, the MSS volume with the label volid is
mounted on the raddr during the attach.• When used to attach an raddr to the system and the raddr is
not a3330V, the volume label of the volume on raddr is
verified.• When used to attach an available raddr to the system and the raddr is a 3330V, the MSS volume with the label volid
is mounted on the raddr during the attach.• When used to attach an raddr to a userid and the raddr is
not a3330V, the volid operand is 3330V specifies that the vaddr is to be treated as a 3330V. The VM/370 control program assumes the virtual machine contains MSS device support. Consequently, MSS cylinder fault support
is not invoked for the vaddr.VOLID volid VOLID is a required keyword and 'volid' is the volume label
for the3330V being attached.
1. It is possible to attach a disk to"SYSTEM" and attach the same
disk to a user without first detaching the disk if the disk was not
accessed while it was attached to the system.
2. A370x cannot be used by VM/370 as a 370x unless it has been loaded
byVM/370, DOS/VS or OS/VS with 270x EP program and VM/370 was
generated with it specified as a2701, 2702, or 2703. The ATTACH
and DETACH commands reset the"loaded" status.
3. The ATTACH
unless all
command.
command should not be issued for a
emulator lines have been disabled370x in
by the
PEP mode
DISABLE4. If the device being attached is a 2305 then both the real device
address and the virtual device address must be specified as the
first exposure on the2305 (that is, device address 0 or 8). When attaching or detaching a dedicated 2305 to a user, all eight
exposures are processed.
5. If the virtual machine to which the device is being attached has
the ECMODE option, any address up toX'FFF' is valid as 'vaddr';
otherwise, any address up to X'5FF' is valid.
6. The hexadecimal address of the virtual device (vaddr) that is
mapped to the real device must be selected with care so that
conflict and contention caused by control unitI/O interface
protocol is avoided.Omitting this parameter causes the assigning
of the raddr as a default.46 t1 M .t':;li" , .. ;.I....J I v Operator's
paging and spooling functions.
device is to be
disks and/or for
This operand has the following meanings when used with the
various forms of the ATTACH command:
raddr is a
mounted on the raddr during the attach.
not a
verified.
is mounted on the raddr during the attach.
not a
is not invoked for the vaddr.
for the
1. It is possible to attach a disk to
disk to a user without first detaching the disk if the disk was not
accessed while it was attached to the system.
2. A
by
generated with it specified as a
and DETACH commands reset the
3. The ATTACH
unless all
command.
command should not be issued for a
emulator lines have been disabled
by the
PEP mode
DISABLE
address and the virtual device address must be specified as the
first exposure on the
exposures are processed.
5. If the virtual machine to which the device is being attached has
the ECMODE option, any address up to
otherwise, any address up to X'5FF' is valid.
6. The hexadecimal address of the virtual device (vaddr) that is
mapped to the real device must be selected with care so that
conflict and contention caused by control unit
protocol is avoided.
of the raddr as a default.