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Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

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Pair mixed devices using storage groups

You can pair devices in a storage group that contains a mixture of RDF and non-RDF devices, or RDF devices with different RDF types, if the remote SG contains devices that can be paired with the R1s in the local SG.

Example

In the following example, local storage group localSG contains 4 devices of mixed types. Before the createpair operation, device A0 is an R1 device and B1 is an R2 device: 

---------------------------------------------------------
Sym                                Device            Cap
Dev     Pdev Name                  Config       Sts  (MB)
---------------------------------------------------------
000A0   N/A                        RDF1+TDEV    RW   3278
000A1   N/A                        TDEV         RW   1875
000B1   N/A                        RDF2+TDEV    RW   4125
000C1   N/A                        TDEV         RW   3278

The createpair operation pairs the devices in the localSG group with devices in the remoteSG group:

  • -sid 123 -sg localSG -type r1 - Create device pairs so that devices in the localSG group on array 123 are R1 devices.
  • -remote_sg remoteSG - Pair the devices in the localSG group with devices in the remoteSG group:

symrdf createpair -sid 123 -rdfg 250 -sg localSG -type r1 -remote_sg remoteSG

After the operation, device A0 is an R11 device and device B1 is an R21 device: 

---------------------------------------------------------
Sym                                Device            Cap
Dev     Pdev Name                  Config       Sts  (MB)
---------------------------------------------------------
000A0   N/A                        RDF11+TDEV   RW   3278
000A1   N/A                        TDEV         RW   1875
000B1   N/A                        RDF21+TDEV   RW   4125
000C1   N/A                        TDEV         RW   3278

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