Skip to main content
Sign Out

Welcome to Dell

My Account
  • Place orders quickly and easily
  • View orders and track your shipping status
  • Enjoy members-only rewards and discounts
  • Create and access a list of your products
  • Manage your Dell EMC sites, products, and product-level contacts using Company Administration.
Sign In Create an Account Dell Financial Services Premier Sign In Partner Program Sign In
Contact Us

Your Dell.com Carts

Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

PDF

Setting up a relationship for cascaded SRDF

About this task

Setting up a cascaded SRDF relationship is a two-step process:

Steps

  1. Create the initial R1 -> R21 pair between array A and array B for the first hop. SRDF/S, SRDF/A, adaptive copy disk mode, or adaptive copy write-pending mode is allowed over the first hop.
    NOTE:

    Adaptive copy write pending mode (acp_wp) is not supported when the R1 side of the RDF pair is on an array running HYPERMAX OS.

    NOTE:

    Only one hop (R1 -> R21 or R21 -> R2) can be asynchronous at a time. If R1 -> R21 is in asynchronous mode, R21 -> R2 must be in adaptive copy disk mode.

  2. Create the R21 -> R2 pair between array B and array C for the second hop. SRDF/S, SRDF/A or adaptive copy disk mode is allowed over the second hop.

    The most common implementation is SRDF/S mode for the first hop and SRDF/A mode for the second hop.

    NOTE:

    For cascaded SRDF without Extended Distance Protection (EDP), the R21 device paired with an R2 device must be in either asynchronous or adaptive copy disk mode.

Rate this content

Accurate
Useful
Easy to understand
Was this article helpful?
0/3000 characters
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please provide ratings (1-5 stars).
  Please select whether the article was helpful or not.
  Comments cannot contain these special characters: <>()\