EMC Symmetrix DMX-3 User Manual

EMC Symmetrix DMX-3 Product Guide
8
Contents
RAID 5 (7+1)............................................................................. 199
RAID 5 modes of operation ................................................... 199
Normal mode........................................................................... 200
Regeneration ............................................................................ 202
RAID 5 performance optimization ....................................... 204
RAID 5 configuration guidelines .......................................... 205
RAID 5 configuration rules.................................................... 205
Symmetrix DMX RAID 6............................................................... 206
RAID 6 overview ..................................................................... 206
RAID 6 attributes..................................................................... 206
RAID 6 device (volume)......................................................... 206
Even-Odd algorithm ............................................................... 207
RAID 6 (6+2)............................................................................. 208
RAID 6 (14+2)........................................................................... 208
Rebuilding data and parity members................................... 209
RAID 6 configuration guidelines .......................................... 210
Comparing RAID 5 and RAID 6 ........................................... 210
Sparing in Symmetrix systems ..................................................... 211
Sparing configuration rules and guidelines ........................ 211
Special DMX-3 sparing considerations ................................ 211
Sparing benefits ....................................................................... 213
Permanent sparing .................................................................. 213
Dynamic sparing ..................................................................... 216
SRDF family of products ............................................................... 221
Base SRDF family products.................................................... 221
SRDF family options ............................................................... 222
SRDF/A resiliency features ................................................... 222
Chapter 6 Mainframe Features and Support
Introduction..................................................................................... 226
Supported mainframe features..................................................... 227
EMC z/OS Storage Manager................................................. 227
Dynamic Channel Management............................................ 228
Dynamic Path Reconnection ................................................. 228
Concurrent Copy..................................................................... 228
Compatible Native Flash for Mainframe............................. 229
Multi-Path Lock Facility/Concurrent Access...................... 230
MultiSubsystem Imaging ....................................................... 230
Sequential Data Striping......................................................... 230
Partitioned Data Set (PDS) Assist ........................................ 230
Multiple Allegiance (MA) ...................................................... 231
Parallel Access Volumes ......................................................... 231

EMC Symmetrix DMX-3 Specifications

General

Brand	EMC
Model	Symmetrix DMX-3
Category	Storage
Language	English