HP Surestore E Disk Array XP256 HP XP P9000 External Storage Access Manager Us - Page 5

Planned outages for system components 46 Options for performing the planned outages 46 The procedures for performing planned outages 47 Performing planned outages (quorum disk only 47 Performing planned outages (primary storage system and quorum disk 48 Performing planned outages (secondary storage system and quorum disk 49 Performing planned outages (both storage systems and quorum disk 50 6 Disaster recovery 51 Main types of failures that can disrupt your system 51 The basic recovery process...51 System failure messages...51 Detecting failures...51 Option 1: Check for failover first 51 Using Remote Web Console to check for failover 52 Using RAID Manager to check for failover 52 Using multipath software to check for failover 52 Option 2: Check for failures only 52 Determining which basic recovery procedures to use 53 Selecting Procedures...53 Recovery from blocked pair volumes 54 Recovering from primary volume failure on the MCU 54 Recovering from secondary volume failure on the MCU 55 Recovering from primary volume failure on the RCU 56 Recovering from secondary volume failure on the RCU 57 Recovery from quorum disk failure 57 Replacement of quorum disks 57 Replacing a quorum disk when the MCU is receiving host I/O 57 Replacing a quorum disk when the RCU is receiving host I/O 58 Recovery from power failure...59 primary storage system recovery 59 Recovering the system when the RCU is receiving host I/O updates 60 Recovering the system when host I/O updates have stopped 60 Secondary system recovery 61 Recovering the system when the P-VOL is receiving host updates 61 Recovering the system when host updates have stopped 61 Recovery from failures using resynchronization 62 Required conditions...62 Determining which resynchronization recovery procedure to use 63 Prerequisites...63 Procedure...64 Recovering primary volume from Business Copy secondary volume 64 Prerequisites...64 Procedure...64 Recovering secondary volume from Continuous Access Journal primary volume 64 Prerequisites...64 Procedure...65 Postrequisites...65 Recovering from path failures 65 Allowing host I/O to an out-of-date S-VOL 66 7 Using ESAM in a cluster system 67 Cluster system architecture...67 Required software...67 Supported cluster software...67 Configuration requirements ...68 Contents 5