True Copy User Guide for VSP One Block

Version: 10.4.x
Audience: anonymous
Part Number: MK-23VSP1B020-04

Overview of TrueCopy
TrueCopy remote replication
System components
Storage systems
Hosts
Volume pairs
Data path
Consistency groups
User interfaces
Failover software
Initial copy and update copy operations
Initial copy operations
Update copy operations
Pair status
Requirements and specifications
System requirements and specifications
Data path requirements and configurations
Bandwidth requirements
Fibre Channel requirements
Supported data path configurations for Fibre Channel
Direct connection
Connection using switches
Extender connection
iSCSI requirements and cautions
Fibre Channel used as remote paths
Restrictions when using NVMe-oF or NVMe/TCP
Planning for TrueCopy
Storage system preparation
Shared memory requirements
Adding shared memory
Removing shared memory
Advanced system settings
Remote replication options
Round trip time option
Minimum number of remote paths option
Maximum initial copy activities option
Blocked path monitoring options
Services SIM of remote copy option
Analyzing workload and planning data paths
Pair and pair volumes planning
Pair volume requirements and recommendations
Allowing I/O to the S-VOL
Allowing I/O to the P-VOL after a split: Fence Level options
Differential data
Maximum number of pairs supported
Calculating the maximum number of pairs
Restrictions when creating an LU whose LU number is 2048 or greater
Restrictions when creating a pair using a namespace whose namespace ID is 2049 or greater
Consistency group planning
Consistency group for pairs in one primary and one secondary storage system
Consistency group for pairs in multiple primary and secondary storage systems
System configurations for consistency groups
Registering pairs to a new consistency group when creating a new TC pair
Registering pairs to a new consistency group when using existing TC pairs
Registering pairs to an existing consistency group when creating a new TC pair
Registering pairs to an existing consistency group when using existing TC pairs
Consistency group requirements
Requirements for a CTG for one primary and one secondary system
Requirements for a CTG for multiple primary and secondary systems
Assigning pairs to a consistency group
Assigning pairs belonging to one primary system and secondary system
Assigning pairs belonging to multiple primary and secondary systems
Using a new CTG
Using an existing CTG
Split behaviors for pairs in a CTG
Host access after split
Consistency group 127
CTG 127 behavior and restrictions when a pair is suspended
CTG 127 behavior and restrictions when the data path fails
Host failover software
Sharing TrueCopy volumes
Volume types that can be shared with TrueCopy
Data Retention Utility
Dynamic Provisioning
Global storage virtualization
Provisioning
ShadowImage
Configurations with ShadowImage P-VOLs
Configurations with ShadowImage S-VOLs
Status reporting and data currency
Thin Image Advanced
Universal Replicator
Virtual LUN
Volume Migration
Restrictions to using a TrueCopy volume as a Volume Migration volume
TrueCopy pair configuration and creation
Adding remote connections
Setting the remote replication options
Creating pairs
Maintaining the TC system
Monitoring pair status
How pair status changes
Pair status definitions
Split types
System behavior
Obtaining the TrueCopy operation data and I/O statistics
Splitting pairs
Resynchronizing pairs
Deleting pairs
Changing P-VOL fence level
Forcibly deleting pairs
Deleting remote connections
Expansion of DP-VOL capacity while keeping pair status
Expanding the capacity of a DP-VOL used in TrueCopy pair
Expansion order policy when TrueCopy pair shares the same volumes with other software
Expanding DP-VOL capacity when TrueCopy pair is used with Universal Replicator
Expanding DP-VOL capacity when TrueCopy pair is used with ShadowImage
Calculating the numbers of differential and pair tables for each pair
Expanding DP-VOL capacity when TrueCopy pair is used with Thin Image Advanced
Expansion order policy in configuration where P-VOL in remote replication shares the same volume with S-VOL in local replication
Expansion order in 3DC cascade, 3DC multi-target, and 3DC delta resync configuration with remote replication
Expansion order when remote replication pairs in a 3DC cascade configuration share the same volumes with local replication pairs (ShadowImage/Thin Image Advanced)
Recovering from failure if the capacity of one volume in a TrueCopy pair cannot be expanded
Recovering from failure if one volume capacity in TrueCopy pair has been expanded
Managing power-off for systems and network devices
How powering off for a planned outage affects primary and secondary systems
Planned outage of the primary system
Planned outage of the secondary system or remote path
Planned outage of both primary and secondary systems
Data migration
Migration overview
Migrating data
Disaster recovery
Disaster recovery overview
Sense information shared between sites
File and database recovery
Switching operations to the secondary site
Switching operations to the secondary site by deleting pairs
Switching operations to the secondary site by not deleting pairs
Checking S-VOL consistency with the P-VOL
Transferring operations back to the primary site
Transferring operations back to the primary site if pairs were deleted
Transferring operations back to the primary site if pairs were not deleted
Troubleshooting TrueCopy
General troubleshooting
Remote path status problems
Split pair problems
SSB codes for TrueCopy
SSB2 error codes when SSB1 = 2E31, B901, B90A, B90B, B912, D004
SSB2=B992 error codes when SSB1 = B901 or B90A
SSB2 error codes when SSB1 = B90B
SSB2 error codes when SSB1 = B912
Service information messages (SIMs)
Pinned track recovery
TC CLI reference
Configuration commands and options
Pair operation commands and options
Consistency group commands and options
Monitoring commands and options
Maintenance commands and options
Parameter range for CCI options

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