Hitachi Universal Storage Platform VM - Manual (Page 4)

iv Contents
Hitachi Universal Storage Platform V/VM User and Reference Guide
Hardware Components...................................................................................... 2-5
Shared Memory ......................................................................................... 2-6
Cache Memory........................................................................................... 2-6
Front-End Directors and Host Channels........................................................ 2-7
Back-End Directors and Array Domains ........................................................ 2-9
Disk Drives and Flash Drives ..................................................................... 2-11
Service Processor..................................................................................... 2-12
Power Supplies ........................................................................................ 2-12
Batteries ................................................................................................. 2-12
Control Panel and Emergency Power-Off Switch................................................ 2-13
Control Panel........................................................................................... 2-13
Emergency Power-Off Switch .................................................................... 2-15
Intermix Configurations................................................................................... 2-16
RAID-Level Intermix................................................................................. 2-16
Data Drive Intermix ................................................................................. 2-17
Device Emulation Intermix........................................................................ 2-17
Functional and Operational Characteristics ............................................. 3-1
RAID Implementation ....................................................................................... 3-2
Array Groups and RAID Levels .................................................................... 3-2
Sequential Data Striping ............................................................................. 3-4
LDEV Striping Across Array Groups.............................................................. 3-5
CU Images, LVIs, and LUs................................................................................. 3-7
CU Images ................................................................................................ 3-7
Logical Volume Images............................................................................... 3-7
Logical Units.............................................................................................. 3-8
Storage Navigator............................................................................................. 3-9
System Option Modes, Host Modes, and Host Mode Options .............................. 3-10
System Option Modes............................................................................... 3-10
Host Modes and Host Mode Options .......................................................... 3-34
Mainframe Operations..................................................................................... 3-35
Mainframe Compatibility and Functionality ................................................. 3-35
Mainframe Operating System Support........................................................ 3-35
Mainframe Configuration .......................................................................... 3-36
Open-Systems Operations ............................................................................... 3-37
Open-Systems Compatibility and Functionality............................................ 3-37
Open-Systems Host Platform Support ........................................................ 3-38
Open-Systems Configuration..................................................................... 3-39
Battery Backup Operations .............................................................................. 3-40