Connecting Mainframe Volumes; Connecting Open Systems Volumes - Hitachi MK-96RD626-07 User Manual

Connecting Mainframe Volumes

Mainframe volumes, that pre-exist on an external storage system and are
accessed by ESCON or FICON channels, cannot connect directly to the
USP V/VM storage system as an external volume. The USP V/VM storage
system does not recognize these volumes because of the fibre channel.
To use external volumes as mainframe volumes, there are two ways:
•
Zero-format external volumes on the external storage system side, map
the external volumes to the internal volumes using Universal Volume
Manager on the local storage system side, and then perform the Write to
Control Blocks operation using the VLL function on the local storage
system side.
•
Map the external volumes to the internal volumes using Universal Volume
Manager on the local storage system side, and then format the mapped
external volumes using the VLL function on the local storage system side.
If you set the emulation type for the mainframe system (e.g., 3390) as you
map the external volume, the status of the mapped volume becomes Blockade
after the mapping operation. After the system administrator performs the
Write to Control Blocks operation or formats the mapped external volumes
using VLL function on the local storage system side, the mainframe host can
then access the new mainframe volume through the local storage system's
ESCON or FICON channels.
Note: If you format the mapped volume of the external storage system from
the external storage system side, the existing data before formatting cannot
be assured. When you use the mapped external volume from the mainframe
OS, format the mapped volume from the local storage system (USP V/VM)
side.
For the procedure of the volume formatting operation and the Write to
Control Blocks operation, see the Virtual LVI/LUN and Volume Shredder
User's Guide.

Connecting Open Systems Volumes

Open systems volumes in external storage systems connect to and are
recognized by the USP V/VM storage system as open systems volumes,
without requiring reformatting. Reformatting is not required because the
connection between the USP V/VM storage system and the external storage
system is fibre channel. If you need to initialize the data area for the volume,
format the volume using the VLL function. For the procedure of the volume
formatting operation, see the Virtual LVI/LUN and Volume Shredder User's
Guide.
Hitachi Universal Storage Platform V/VM Universal Volume Manager User's Guide
About Universal Volume Manager Operations 2-19