Srdfsynchronous operations 59 copyright 2015 emc

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SRDF/Synchronous Operations
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59 Copyright 2015 EMC Corporation. All rights reserved. Next we unmount the Production_Datastore. After this we will perform an SRDF Failover. CLI operations for this has been presented in an earlier lesson. Using Unisphere for VMAX to perform SRDF operations will be presented in a later lesson in the module. SRDF/Synchronous Operations
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60 Copyright 2015 EMC Corporation. All rights reserved. We now rescan Remote ESXi Server for all storage. The process for accessing the R2 device from the Remote ESXi server is identical to the one we used for accessing the linked Target on the Secondary ESXi server. SRDF/Synchronous Operations
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61 Copyright 2015 EMC Corporation. All rights reserved. After rescan completes, use the Add Storage wizard on the Remote ESXi server. The VMFS label Production_Datastore indicates that it is the datastore on the R2 device. Choose this LUN and click Next. SRDF/Synchronous Operations
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62 Copyright 2015 EMC Corporation. All rights reserved. As the LUN is a replica, we get Mount Options. In this example we choose to keep the existing signature. SRDF/Synchronous Operations
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63 Copyright 2015 EMC Corporation. All rights reserved. In the example of SnapVX we had assigned a new signature. So the datastore on the linked Target was named snap-xxxxx. In this example for SRDF/S, we chose to keep the existing signature. Hence the name has not been pre-fixed. The same name (Production_Datastore) as on the Primary ESXi server is retained. SRDF/Synchronous Operations
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64 Copyright 2015 EMC Corporation. All rights reserved. Next we browse the datastore and add the VM to the inventory of the Remote ESXi server. We are retaining the same name for the VM. We choose the Remote ESXi server to host this VM on. SRDF/Synchronous Operations
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65 Copyright 2015 EMC Corporation. All rights reserved. As the VM is a replica, we select “I copied it” for the Virtual Machine Message, when we power it on. SRDF/Synchronous Operations
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66 Copyright 2015 EMC Corporation. All rights reserved. We can open a console to the VM on the Remote ESXi server and verify that it has the same data that was available on the Primary ESXi server at the time of the “graceful” failover. SRDF/Synchronous Operations
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67 Copyright 2015 EMC Corporation. All rights reserved. To simulate resuming production work from the R2 device, we add more data to the VM. Next we will do the steps necessary to failback the SRDF pair, resume production work on the R1 device, and verify that the data added in the failed over state is available back on the R1 device. SRDF/Synchronous Operations
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68 Copyright 2015 EMC Corporation. All rights reserved. Prior to performing an SRDF failback and resuming production work from the R1 device, we shut down the VM on the Remote ESXi server and remove it from inventory. Remember that the R2 device will be Write Disabled on a failback operation.
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