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Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

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Split

Split SRDF pairs when you require read and write access to the target (R2) side of one or more devices in a device group, composite group, storage group, or device file.

For a split operation, SRDF carries out the following activities for each specified SRDF pair:

  1. Suspend traffic on the SRDF links.
  2. Set the target (R2) device to read/write enabled to its local hosts.

    After the target (R2) device is split from the source (R1) device, the SRDF pair is in the Split state.

The following image shows splitting an SRDF pair.

Figure 1. Split an SRDF pair
NOTE:

When you issue the symrdf command, device external locks are set on all SRDF devices you are about to establish. See Device external locks and Table 1.

Syntax

Use split for a device group, composite group, storage group, or device file: 

symrdf -g DgName split
symrdf -cg CgName split
symrdf -sg SgName split
symrdf -f[ile] FileName split
NOTE:

Include the -force option when the device pairs are in domino mode or adaptive copy mode.

Examples

To perform a split on all the SRDF pairs in the prod device group:

symrdf -g prod split

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