Front cover -- Contents -- Figures -- Tables -- Preface -- The team that wrote this redbook -- Special notice -- IBM trademarks -- Comments welcome -- Chapter 1. Introduction -- 1.1 Introduction to the IBM Enterprise Storage System -- 1.1.1 The Seascape architecture -- 1.1.2 Enterprise Storage System overview -- 1.1.3 ESS Copy Services components -- FlashCopy -- Peer-to-Peer Remote Copy (PPRC) -- 1.2 Introduction to high availability concepts -- 1.2.1 Multipathing -- What is multipathing? -- When is it used? -- Static and dynamic load balancing -- Why you need multipathing software -- 1.2.2 Mirroring -- What is mirroring? -- Software mirroring -- Hardware mirroring -- Why is it used? -- 1.2.3 Multipathing versus mirroring -- 1.2.4 Clustering -- What is it? -- Why is it used? -- Chapter 2. Basic concepts of ESS with multipathing and clustering -- 2.1 Concepts of high availability -- 2.1.1 What is high availability? -- Downtime issues -- 2.1.2 Single system availability -- 2.1.3 Increasing availability by clustering -- Clustering concept basics -- 2.2 How disks are seen on ESS -- 2.2.1 Overview -- 2.2.2 SCSI -- Targets and LUNs -- SCSI host system limitations -- 2.2.3 Fibre Channel -- Targets and LUNs -- Fibre Channel access modes -- 2.2.4 Fibre Channel Storage Area Networks (SANs) -- 2.3 Managing the number of paths to a LUN -- 2.3.1 How many paths are seen -- SCSI connection -- Fibre Channel connections -- 2.3.2 How to reduce paths -- Reduce by ESS configuration -- Reduce by zoning -- Reduce by adapter profiles -- Reduce by SAN management software -- 2.3.3 Paths over inter switch links -- Chapter 3. Multipathing software -- 3.1 IBM Subsystem Device Driver -- 3.1.1 Path algorithms -- Single-path mode -- Multiple-path mode -- 3.1.2 How many paths to use with SDD -- 3.1.3 Usage of datapath command -- Usage of datapath query adapter command.

Usage of datapath query adaptstats command -- Usage of datapath query device command -- Usage of datapath query devstats command -- Usage of datapath set adapter command -- Usage of datapath set device command -- 3.2 HP-UX LVM built-in support for Physical Volume Links -- 3.3 Veritas VxVM built-in Dynamic MultiPathing software (DMP) -- 3.3.1 Supported disk arrays -- 3.3.2 Path failover and load balancing -- Chapter 4. Clustering concepts -- 4.1 What is a cluster? -- 4.2 The benefits of clustering -- 4.2.1 Why consider a cluster? -- High availability -- Scalability -- Performance -- Price/performance -- Manageability -- Administrative clustering -- 4.2.2 What is high availability? -- 4.2.3 Server consolidation -- Logical consolidation -- Physical consolidation -- Re-centralization -- 4.3 Types of clusters -- 4.3.1 Software for clusters -- 4.3.2 Hardware for clusters -- Shared disk -- Shared nothing -- 4.3.3 Active and passive servers -- Active / active -- Active / passive -- Hybrid -- 4.4 IBM cluster strategy -- 4.5 Linux clustering -- High performance computing or scientific computing -- Load balancing or scalability -- High availability and failover -- 4.5.1 Implementing Linux clustering -- 4.5.2 Failover service -- 4.5.3 Load balancing -- Direct routing -- Network Address Translation -- Tunneling -- 4.5.4 Supported services -- 4.5.5 Sharing the data between nodes -- rsync -- Network File System (NFS) -- Global File System (GFS) -- Intermezzo -- Back-end database -- 4.5.6 Putting it all together -- 4.6 RS/6000 Cluster Technology (RSCT) overview -- 4.6.1 Topology Services (TS) -- TS overview -- 4.6.2 Group Services (GS) -- GS overview -- 4.6.3 Event Management (EM) -- EM overview -- Chapter 5. SDD installation and configuration on AIX -- 5.1 Pre-installation checks -- 5.2 Hardware and software requirements -- 5.2.1 SCSI requirements.

5.2.2 Fibre Channel requirements -- 5.2.3 Non supported environments -- 5.3 Installing and configuring Fibre Channel device drivers -- 5.3.1 Installing Fibre Channel device drivers -- Verifying the installation -- 5.3.2 Gigabit Fibre Channel Adapter for PCI bus FC 6227 (type 4-S) features -- 5.3.3 2-Gigabit Fibre Channel Adapter for PCI bus FC 6228 (type 4-W) features -- 5.3.4 Problem determination -- Complexity of the Fibre Channel Environment -- Nature of Fibre Channel environment problems -- Upgrading the Fibre Channel adapter firmware -- 5.4 Installing and configuring the IBM Subsystem Device Driver -- 5.4.1 Installing the IBM Subsystem Device Driver -- Verifying the SDD Installation -- Major files installed with SDD software -- 5.4.2 Configuring the Subsystem Device Driver -- Preparing to configure the Subsystem Device Driver -- Configuring the Subsystem Device Driver -- Verifying the SDD configuration -- Changing the path-selection policy -- Adding paths to SDD devices which belongs to a volume group -- 5.4.3 Unconfiguring the Subsystem Device Driver devices -- 5.4.4 Removing the Subsystem Device Driver -- 5.5 Using IBM SDD on AIX host -- 5.5.1 Providing load-balancing and failover protection -- Displaying the ESS vpath device configuration -- Configuring a volume group for failover protection -- Importing a volume group with SDD -- Exporting a volume group with SDD -- How failover protection can be lost -- Recovering from mixed volume groups -- Extending an existing SDD volume group -- Backing-up all files belonging to a SDD volume group -- Restoring all files belonging to a SDD volume group -- SDD-specific SMIT panels -- 5.5.2 Using ESS devices directly -- 5.5.3 Using ESS devices through AIX LVM -- 5.5.4 Migrating non-SDD volume group to ESS SDD multipath volume group -- 5.5.5 SDD utility programs -- Usage of datapath command.

5.5.6 SDD error log messages -- 5.6 How to use HACMP with SDD -- 5.6.1 Understanding the SDD support for HACMP/6000 -- 5.6.2 What's new in SDD for HACMP/6000 -- 5.6.3 Special requirements for HACMP/6000 -- How to recover paths that are lost during HACMP/6000 node failover -- 5.6.4 Models of the ESS supported in HACMP/6000 environment -- 5.7 Upgrading SDD for AIX 4.2.1, AIX 4.3.2 and AIX 4.3.3 -- 5.7.1 Upgrading to SDD 1.3.0.x through a non-disruptive installation -- 5.7.2 Upgrading to SDD 1.3.0.x through a disruptive installation -- 5.8 Using concurrent download of licensed internal code -- Chapter 6. DMP installation and configuration on Sun servers -- 6.1 Concepts of multipathing and clustering on Sun platform -- 6.2 Hardware and software requirements -- 6.2.1 Hardware -- 6.2.2 Software -- 6.2.3 Non supported environments -- 6.3 Preparing the environment -- 6.3.1 Installing the operating system -- 6.3.2 Configuring all HBAs -- sd_max_throttle -- sd_io_time -- set maxphys -- 6.3.3 Emulex -- automap=1 -- -- fcp-on=1 -- -- lun-queue-depth -- network-on=0 -- -- topology=2 -- -- zone-rscn=1 -- -- 6.3.4 JNI -- fca_nport -- public_loop = 0 -- -- ip_disable = 1 -- -- scsi_probe_delay = 5000 -- -- failover = 60 -- -- 6.3.5 Setting up the ESS -- 6.3.6 Attaching an ESS to a Sun Solaris Enterprise Servers -- 6.4 Using the SDD -- 6.4.1 When to use SDD -- 6.4.2 Installing the Subsystem Device Driver -- Post-installation -- 6.4.3 Uninstalling the Subsystem Device Driver -- 6.5 Installing and configuring Veritas Volume Manager -- 6.5.1 Creating a filesystem under Veritas -- 6.5.2 Sun Veritas and ESS logical volumes -- 6.5.3 ESS identification under Veritas -- 6.6 Installing and configuring cluster software -- Chapter 7. SDD installation and configuration on HP-UX servers -- 7.1 Concepts of multipathing and clustering on HP-UX platform.

7.2 Hardware and software requirements -- 7.2.1 Hardware -- 7.2.2 Software -- 7.2.3 Non supported environments -- 7.3 Preparing the environment -- 7.3.1 Pre-installation planning -- 7.3.2 Installing the operating system -- 7.3.3 Installing and confirming HP-UX installation patches -- 7.3.4 Confirming correct installation of the host bus adapter -- 7.3.5 Setting up the ESS -- 7.3.6 Attaching an ESS to a Hewlett Packard 9000 -- 7.3.7 Confirming storage connectivity -- Switched fabric -- Fibre Channel Arbitrated Loop -- 7.3.8 Tuning recommendations -- 7.3.9 Installing and configuring cluster software -- 7.4 Installing and uninstalling the SDD -- 7.4.1 What is PV-Link? -- 7.4.2 How to use PV-Links -- 7.4.3 PV-Link versus SDD -- 7.4.4 Installing SDD -- Verifying the SDD Installation and preparing the vpaths -- Creating Volume Groups using the SDD -- Configuring the Volume Groups using the SDD -- 7.4.5 Uninstalling SDD -- Verifying the SDD uninstallation -- Chapter 8. Installing Fibre Channel and configuring multipathing on SGI IRIX 6.5 -- 8.1 Supported configurations -- Direct connection -- Switched fabric -- 8.2 Installation of Fibre Channel on SGI IRIX 6.5 -- 8.2.1 Confirming IRIX installation -- 8.2.2 Confirming QLA2200F installation -- 8.2.3 Setting up ESS -- Adding or modifying SGI connections -- Configuring host adapter ports -- Adding and assigning volumes -- 8.2.4 Installing optical cable -- Switched fabric -- Fibre Channel Arbitrated Loop -- 8.2.5 Confirming switch connectivity -- Switched fabric only -- Zoning -- 8.2.6 Confirming storage connectivity -- Switched fabric LUN -- Fibre Channel Arbitrated Loop -- 8.3 Configuring host path failover -- 8.3.1 General considerations -- 8.3.2 Switched fabric -- 8.3.3 Fibre Channel Arbitrated Loop -- 8.3.4 Manually switch IO between the primary and alternate path -- 8.4 Working with ESS volumes.

8.4.1 Configuring storage.