Document Outline

• HP StorageWorks Continuous Access XP user guide for the XP1024/XP128
• Contents
• About this guide
  • Intended audience
  • Prerequisites
    • Firmware versions
      • Table 1 Recommended and minimum firmware versions
  • Related documentation
  • Document conventions and symbols
    • Table 2 Document conventions
  • HP technical support
  • Subscription service
    • Helpful web sites
• 1 Continuous Access XP for the XP1024/XP128
  • Overview of Continuous Access XP operations
    • Components
      • Figure 1 Continuous Access XP components for Fibre Channel connections
      • Figure 2 Continuous Access XP components for Serial (ESCON) connections
      • XP1024/XP128
      • Main and remote control units (MCUs and RCUs)
      • Volume pairs (P-VOLs and S-VOLs)
        • Table 3 Continuous Access XP supported RAID level configurations
      • Continuous Access XP Asynchronous consistency groups
      • Remote copy connections
      • Initiator ports and RCU target ports
      • Remote control ports (RCPs) and local control ports (LCPs)
      • Command View XP management station or XP Remote Web Console
      • Host failover software
    • Remote copy operations
      • Figure 3 Remote copy operations
      • Initial copy operations
      • Update copy operations
      • Read and write I/O operations for Continuous Access XP volumes
      • S-VOL write option
    • Continuous Access XP Asynchronous recordset operations
      • Creating and storing recordsets at the MCU
      • Sending recordsets to the RCU
      • Storing recordsets at the RCU
      • Selecting and settling recordsets at the RCU
        • Figure 4 Selecting and settling Continuous Access XP Async recordsets at the RCU
      • Types of recordsets
      • Inflow control of recordsets
        • Inflow control by MCU
        • Inflow control by RCU
          • Table 4 Sidefile threshold values for Continuous Access XP Asynchronous operations and write pending operations
    • Continuous Access XP Asynchronous consistency group operations
      • Group options
        • Copy pending timeout
        • RCU ready timeout
      • Group operations
    • Continuous Access XP volume pair status
      • Continuous Access XP LUSE pair status
      • Continuous Access XP Asynchronous pair status
        • Table 5 Continuous Access XP Asynchronous pair status descriptions
      • Continuous Access XP split types (PSUS)
        • Table 6 Continuous Access XP split types (PSUS)
        • Table 7 Consistency status descriptions for split/suspended Continuous Access XP Async S-VOLs
      • Continuous Access XP suspend types
        • Table 8 Continuous Access XP suspend types
      • Continuous Access XP Asynchronous suspension conditions
        • Table 9 Continuous Access XP Asynchronous suspension conditions
  • Preparing for Continuous Access XP operations
    • System requirements
    • Requirements and restrictions
      • One-to-one volume copy operations
      • Logical unit (LU) types
      • Consistency groups
      • Accessing Continuous Access XP P-VOLs and S-VOLs
      • Cache and nonvolatile storage (NVS)
      • Host failover software
      • Duplicate volumes
      • Host system crash
    • Installing hardware
      • Fibre Channel remote copy connections
        • Figure 5 Fibre Channel remote copy connections
        • Figure 6 Direct connection
        • Figure 7 Switch connection
        • Figure 8 Extender connection
      • Serial remote copy connections
        • Figure 9 Serial remote copy connections
        • Figure 10 N pairs of remote copy connections
        • Figure 11 N-to-1 and 1-to-n remote copy connections (n less than or equal to 4)
        • Figure 12 Remote copy connections shared with channel-to-RCU connections
    • Configuring MCUs and RCUs for Continuous Access XP operations
      • Fibre Channel and serial interface configuration
        • Figure 13 Add RCU and RCU Option panes
        • Figure 14 Async Option and Add CT Group panes
    • Combining Continuous Access XP with other data management operations
      • Combining Continuous Access XP and BC
        • Table 10 Host pair status reporting for Continuous Access XP, BC, and Continuous Access XP/BC shared volumes
        • Table 11 Data currency of a shared Continuous Access XP/BC volume
        • Figure 15 Shared Continuous Access XP P-VOL and shared BC P-VOL
        • Figure 16 Shared Continuous Access XP S-VOL and shared BC P-VOL
        • Figure 17 Shared Continuous Access XP/BC P-VOL and shared Continuous Access XP S-VOL/BC P-VOL
        • Figure 18 Shared BC S-VOL/Continuous Access XP P-VOL
  • Starting Continuous Access XP
    • Figure 19 Continuous Access XP main pane
    • Continuous Access XP panes
      • Table 12 Continuous Access XP functions
    • Continuous Access XP main pane (Pair Operation pane)
      • Volume list
        • Figure 20 Volume list (partial view)
        • Table 13 Volume icons for Continuous Access XP operations
        • Table 14 Status icons for Continuous Access XP operations
      • Display Filter pane
        • Figure 21 Display Filter pane
      • Continuous Access XP Snapshot function
        • Table 15 Snapshot functions
      • Creating and exporting (downloading) Continuous Access XP snapshot files
    • RCU Operation pane
      • Figure 22 RCU Operation pane
      • CU Number tree and MCU/RCU list
        • Figure 23 RCU Operation pane with the MCU&RCU option button selected
      • Port tree and Port list
        • Figure 24 RCU Operation pane with the Port option button selected
    • Asynchronous Operation pane
      • Figure 25 Asynchronous Operation pane
    • Usage Monitor pane
      • Figure 26 Usage Monitor pane
    • History Operations pane
      • Figure 27 History Operations pane
  • Performing Continuous Access XP configuration operations
    • MCU operations
      • Configuring MCU ports
    • RCU operations
      • Viewing RCU Status (RCU Status)
        • Figure 28 RCU Status pane
        • Table 16 Logical path status
      • Registering RCUs (Add RCU)
        • Figure 29 Add RCU pane
        • Figure 30 RCU Option pane
        • Registering RCUs to the connected MCU
          • Figure 31 RCU Settings Parameter list
      • Modifying RCU options (Change RCU Option)
        • Figure 32 RCU Option pane
        • Figure 33 RCU Settings Parameter list (RCU Option)
      • Deleting RCUs (Delete RCU)
      • RCU path parameters
        • Figure 34 Fibre Channel interface connections going through switches
        • Figure 35 Add RCU pane used for configuration in Figure 34
      • Adding and deleting logical paths for RCUs (Add Path/Delete Path)
        • Figure 36 Add Path pane
        • Adding new logical paths from the connected MCU to an existing RCU:
        • Deleting paths from the connected MCU to an existing RCU:
      • Adding and deleting SSIDs for RCUs (Add SSID/Delete SSID)
        • Figure 37 Add SSID pane
      • Port change operation
        • Figure 38 Changing port types
      • Modifying parameters and deleting settings
        • Modifying parameters
        • Deleting RCUs, paths, or SSIDs
    • Continuous Access XP Asynchronous operations
      • Viewing consistency group status (CT Group Status)
        • Figure 39 CT Group Status pane
      • Adding consistency groups (Add CT Group)
        • Figure 40 Add CT Group pane
      • Modifying consistency group options (CT Group Option)
        • Figure 41 CT Group Option pane
        • Figure 42 Consistency Group Settings Parameter list
      • Deleting consistency groups (Delete CT Group)
      • Asynchronous copy option
        • Figure 43 Async Option pane
        • Figure 44 Asynchronous Option Settings Parameter list
      • Modifying parameters and deleting consistency groups
        • Modifying parameters
        • Deleting consistency groups
    • Usage Monitor operations
      • Starting and stopping monitoring
        • Starting remote copy usage monitoring
        • Stopping remote copy usage monitoring
      • Displaying usage monitor graph
        • Figure 45 Display Item pane
        • Table 17 Remote copy I/O statistics
    • Optimizing Continuous Access XP operations and disk array performance
      • Table 18 Disk array performance conditions and recommendations
    • Discontinuing Continuous Access XP operations
  • Performing Continuous Access XP pair operations
    • Preparing for Continuous Access XP volume pair operations
    • Common procedure for Continuous Access XP pair operations
      • List after command selection
      • Modifying parameters and deleting LUs
        • Modifying LU parameters
        • Deleting LUs
    • Viewing Continuous Access XP pair status for LUs and LDEVs (Pairdisplay)
      • Figure 46 Pairdisplay pane
    • Creating Continuous Access XP volume pairs (Paircreate)
      • Figure 47 Paircreate pane
      • Figure 48 Pair Settings Parameter list (Paircreate)
      • Continuous Access XP initial copy and pair options of the Paircreate pane
        • Fence Level (Continuous Access XP Synchronous only)
        • Initial Copy parameters
        • Asynchronous parameters
    • Splitting Continuous Access XP pairs (Pairsplit-r)
      • Figure 49 Pairsplit-r pane
      • Figure 50 Pair Settings Parameter list (Pairsplit-r)
    • Resuming Continuous Access XP volume pairs (Pairresync)
      • Figure 51 Pairresync pane
      • Figure 52 Pair Settings Parameter list (Pairresync)
    • Deleting Continuous Access XP volume pairs (Pairsplit-S)
      • Figure 53 Pairsplit-S pane
      • Figure 54 Pair Settings Parameter list (Pairsplit-S)
    • Changing pair options (Change Pair Option)
      • Figure 55 Change Pair Option pane
      • Figure 56 Pair Settings Parameter list (Pair Option)
    • Using Continuous Access XP for data migration and duplication
      • Data migration using Continuous Access XP Synchronous
      • Point-in-Time data duplication using Continuous Access XP Asynchronous
    • Powering off and on Continuous Access XP components
      • Planned outage of MCUs
      • Planned outage of RCUs or remote copy connections
      • Planned outage of MCUs and RCUs
  • Continuous Access XP disaster recovery operations
    • Preparing for disaster recovery
      • Considering the P-VOL fence-level setting
        • Table 19 Fence-level settings on Continuous Access XP Sync P-VOLs
      • Setting the fence level
        • Figure 57 Relationship between log file and data file in PAIR status
      • Transferring sense information between sites
      • File and database recovery procedures
    • Switching operations to remote sites
      • Analyzing currency of Continuous Access XP Synchronous S-VOLs
        • Table 20 Determining Continuous Access XP Synchronous S-VOL currency based on its pair status and P-VOL fence-level setting
      • Analyzing consistency of Continuous Access XP Asynchronous S-VOLs
        • Table 21 Determining Continuous Access XP Async S-VOL consistency based on its pair status and consistency status
    • Transferring operations back to primary sites
    • Resuming normal operations at primary sites
  • Error codes and messages
    • Continuous Access XP error codes
    • Service Information Messages (SIMs)
  • Pinned track recovery for Continuous Access XP volumes
• Index
  • A
  • B
  • C
  • D
  • E
  • F
  • H
  • I
  • L
  • M
  • N
  • O
  • P
  • R
  • S
  • T
  • U
  • V
  • W