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Hitachi Command Control Interface (CCI) User and Reference Guide xiii
List of Figures
Figure 2.1 Concept of Paired Volumes............................................................... 9
Figure 2.2 ShadowImage Duplicated Mirrors ...................................................... 10
Figure 2.3 ShadowImage Cascade Volume Pairs .................................................. 11
Figure 2.4 Server Failover System Configuration................................................. 14
Figure 2.5 Package Transfer on High Availability (HA) Software .............................. 15
Figure 2.6 Hitachi TrueCopy Remote System Configuration.................................... 16
Figure 2.7 Hitachi TrueCopy Local System Configuration....................................... 16
Figure 2.8 ShadowImage System Configuration................................................... 17
Figure 2.9 Hitachi TrueCopy Asynchronous Consistency Groups ............................... 24
Figure 2.10 Sidefile Quantity Limit .................................................................. 25
Figure 2.11 Hitachi TrueCopy Async Suspension Condition....................................... 28
Figure 2.12 Relation between Logs and Data in Paired Status................................... 30
Figure 2.13 Backing Up S-VOL in Paired Status Using Hitachi TrueCopy ....................... 31
Figure 2.14 Backing Up S-VOL in Paired Status Using ShadowImage............................ 32
Figure 2.15 Restoring S-VOL to P-VOL in Split Status Using Hitachi TrueCopy ................ 33
Figure 2.16 Restoring S-VOL to P-VOL in Split Status Using ShadowImage..................... 34
Figure 2.17 Swapping Paired Volume for Duplex Operation — Hitachi TrueCopy Only ...... 35
Figure 2.18 Restoring S-VOL for Duplex Operation (Hitachi TrueCopy Only).................. 36
Figure 2.19 Copy-on-Write Snapshot and Volume Mapping....................................... 37
Figure 2.20 HORCM Operational Environment...................................................... 45
Figure 2.21 CCI Software Structure .................................................................. 47
Figure 2.22 RAID Manager Communication Among Different Operating Systems ............. 49
Figure 2.23 Configuration Definition of Paired Volumes.......................................... 50
Figure 2.24 Configuration File Example — UNIX-Based Servers.................................. 51
Figure 2.25 Configuration File Example — Windows Servers..................................... 51
Figure 2.26 Configuration and Unit IDs for Multiple Storage Systems .......................... 53
Figure 2.27 Configuration for Multiple Networks .................................................. 58
Figure 2.28 Network Configuration for IPv6 ........................................................ 59
Figure 2.29 Network Configuration for IPv4 Mapped IPv6 ........................................ 60
Figure 2.30 Network Configuration for Mixed IPv4 and IPv6 ..................................... 61
Figure 2.31 Example of Alternate Path for Command Device for Solaris Systems............ 64
Figure 2.32 Alternate Command Device Function ................................................. 64
Figure 2.33 Relation between Special File and Special LDEV.................................... 65
Figure 2.34 HORCM and Command Issue Process .................................................. 66
Figure 2.35 Flow of Command Issue ................................................................. 66
Figure 2.36 LUSE Device and Command Issue ...................................................... 67
Figure 2.37 Relation between LDEVs and Command Device on LDKC .......................... 68
Figure 2.38 Current Assignment Sequence.......................................................... 69
Figure 2.39 Improved Assignment Sequence....................................................... 70
Figure 2.40 Hitachi TrueCopy Remote Configuration Example .................................. 77
Figure 2.41 Hitachi TrueCopy Local Configuration Example ..................................... 79
Figure 2.42 Hitachi TrueCopy Configuration Example for Two Instances...................... 82
Figure 2.43 ShadowImage Configuration Example..............................................86-87
Figure 2.44 ShadowImage Configuration Example with Cascade Pairs ......................... 92
Figure 2.45 Hitachi TrueCopy/ShadowImage Configuration Example with Cascade Pairs... 96
Figure 2.46 Mirror Descriptors and Group Assignment ............................................ 99
Figure 2.47 ShadowImage Cascade Connection and Configuration File ....................... 101