Functional and Operational Characteristics 3-7
Hitachi Universal Storage Platform V/VM User and Reference Guide
CU Images, LVIs, and LUs
CU Images
The Universal Storage Platform V/VM is configured with one control unit image
for each 256 devices (one SSID for each 64 or 256 LDEVs) and supports a
maximum of 510 CU images (255 in each logical disk controller, or LDKC).
The USP V/VM supports the following control unit (CU) emulation types:
• 3990-6, 3990-6E
• 2105, 2107
The mainframe data management features of the USP V/VM may have
restrictions on CU image compatibility.
For further information on CU image support, refer to the Mainframe Host
Attachment and Operations Guide (MK-96RD645), or contact your Hitachi Data
Systems account team.
Logical Volume Images
The Universal Storage Platform V/VM supports the following mainframe LVI
types:
• 3390-3, -3R, -9, -L, and –M. The 3390-3 and 3390-3R LVIs cannot be
intermixed in the same storage system.
• 3380-3, -F, -K. The use of 3380 device emulation is restricted to Fujitsu
environments.
The LVI configuration of the USP V/VM storage system depends on the RAID
implementation and physical data drive capacities. The LDEVs are accessed
using a combination of logical disk controller number (00-01), CU number
(00-FE), and device number (00-FF). All control unit images can support an
installed LVI range of 00 to FF.
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