HP XP7 Owner Guide (H6F56-96006)

The mainframe data management features of the XP7 may have restrictions on CU image
compatibility.
For further information on CU image support, see the Mainframe Host Attachment and Operations
Guide, or contact HP.
Logical Volume images
The XP7 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
disk array.
• 3380-3, -F, -K.
The LVI configuration of XP7 Storage 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.
Logical Units
XP7 Storage is configured with OPEN-V logical unit types. The OPEN-V logical unit can vary in
size from 48.1 MB to 4 TB. For information on other logical unit types (e.g., OPEN-9), contact HP
support.
For maximum flexibility in logical unit configuration, the XP7 provides the VLL and LUN Expansion
(LUSE) features. Using VLL, users can configure multiple logical units under a single LDEV. Using
Virtual LVI or LUSE, users can concatenate multiple logical units into large volumes. For further
information on VLL and Virtual LVI, see the HP XP7 Performance for Open and Mainframe Systems
User Guide and the HP XP7 Provisioning for Open Systems User Guide
Mainframe operations
This section provides high level descriptions of mainframe compatibility, support, and configuration.
Mainframe compatibility and functionality
In addition to full System Managed Storage (SMS) compatibility, XP7 Storage provides the following
functions and support in the mainframe environment:
• Sequential data striping
• Cache fast write (CFW) and DASD fast write (DFW)
• Enhanced dynamic cache management
• Extended count key data (ECKD) commands
• Multiple Allegiance
• Concurrent Copy (CC)
• Peer-to-Peer Remote Copy (PPRC)
• Compatible FlashCopy
• Parallel Access Volume (PAV)
• Enhanced CCW
• Priority I/O queuing
• Red Hat Linux for IBM S/390 and zSeries
Mainframe operations 27