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Dell SRDF Introduction

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Migration-only SRDF

In some cases, you can migrate data with full SRDF functionality, including disaster recovery and other advanced SRDF features.

In cases where full SRDF functionality is not available, you can move the data using migration-only SRDF.

Table 1. Limitations of the migration-only mode This table lists SRDF common operations and features and whether they are available in SRDF groups during SRDF migration-only environments.
SRDF operations or features Whether supported during migration
R2 to R1 copy Only for device rebuild from un-rebuildable RAID group failures.
Failover, failback, domino Not available
SRDF/Star Not available
SRDF/A features (DSE, Consistency Group, ECA, MSC) Not available
Dynamic SRDF operations (create, delete, and move SRDF pairs; R1/R2 personality swap). Not available
TimeFinder operations Only on R1
Online configuration change or upgrade.
  • If the changes affect the group or devices being migrated, migration must be suspended before and while the upgrade or configuration changes take place.
  • If the changes do not affect the group or devices being migrated, migration can continue while the upgrade or configuration changes take place.
Out-of-family Non-Disruptive Upgrade (NDU) Not available

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