the operaticn is not subject to translation, and
the operation.
In
units on a channel both as minidisks and dedicated devices and with
sharing,
balance
results of the subsequent I/O interruption to the appropriate storage
areas of each virtual machine.
By specifying a dedicated channel for a virtual machine (using the
class B ATTACH CHANNEL command), the virtual machine has the channel and
all the devices for its
However,
device addresses on·the dedicated channel
addresses; thus,
channels because then the only translation done by
address translation. Dedicated devices should be specified on separate
channels so that
Areal disk volume can be shared
owning a number of contiguous cylinders. This logical subdividing of a
real disk volume is called physical pack sharing, and each subdivision
of cylinders is called a virtual
use. When using dedicated disk volumes, the virtual machine's operating
system must perform all necessary interruption handling, error recovery,
and error recording.
By using either the LINK directory control statement or the CP LINK
command, a user can share the data on a minidisk or entire disk volume
with the owner of the virtual disk. The LINK statement or command
allows controlled, concurrent access to the data on the virtual disk.
This sharing is called logical data sharing.
If any virtual
allocating disk space with the stand-alone CP format/allocate