1 Overview of mainframe operations
This chapter provides an overview of mainframe host attachment issues, functions, and operations.
Mainframe compatibility and functionality
The P9500 disk arrays provide full System-Managed Storage (SMS) compatibility and support the
following features 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)
• Extended Remote Copy (XRC)
• FlashCopy
• Parallel Access Volume (PAV)
• Enhanced Channel Command Word (CCW)
• Priority I/O queuing
The following table lists the mainframe operating systems currently supported by the storage system.
Contact your HP representative for the latest information on mainframe operating system support.
Table 1 Mainframe operating system support
Operating systemsVendor
OS/390IBM
MVS/ESA, MVS/XA
VM/ESA, VSE/ESA
z/OS, z/OS.e, z/VM, z/VSE
TPF
• Linux for IBM S/390 and zSeries
• Novell SuSE for IBM S/390 and zSeries
Red Hat
MSPFujitsu
Connectivity
The storage system supports all-mainframe, all-open-system, and multi-platform configurations. The
CHAs process the channel commands from the hosts and manage host access to cache. In the
mainframe environment, the channel adapters (CHAs) perform CKD-to-FBA and FBA-to-CKD
conversion for the data in cache.
Each CHA feature (pair of boards) is composed of one type of host channel interface: FICON/zHPF
or Fibre Channel Protocol (FCP). The channel interfaces on each board can transfer data
simultaneously and independently.
Mainframe compatibility and functionality 5
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