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IBM XIV Storage System Copy Services and Migration by Jim Sedgwick, Hank Sautter, Guenter Rebmann, Christian Burns, Bertrand Dufrasne

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Synchronous remote mirroring
Synchronous mirroring enables replication between two XIV Storage System volumes or consistency groups (CG).
This chapter describes synchronous remote mirroring and available options. Topics covered include configuration and usage, and disaster recovery considerations.
 
Important:
For mirroring, a reliable, dedicated network is preferred. Links can be shared, but require available and consistent network bandwidth. The specified minimum bandwidth (10 Mbps for FC and 50 Mbps for iSCSI for the XIV release 11.1.x) ...

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