HUR – create a replication pair

In this post we will be talking about creating a replication pair for the HUR (Hitachi Universal Replicator) Once HUR is configured and both arrays have luns defined in Journal Volumes, you can go ahead and create a replication pair. You have to know that a lun has to be assigned to a port (see here) before it can take part of any type of replication operation.

create a replication pair

All operations in this article are done via the GUI using a VSP that replicates to a USP. You should be familiar with how to assign a lun to a host using storage navigator before navigating in the replication waters.

Also, you need to know the following things

P-VOL S-VOL
Lun 00:01:00 00:02:00
Port CL1-A CL2-B
Host_grp numer: 3 2
Lun number in host_grp: 2 5

So in this case we will be creating a replication pair between 0:01:00 on primary array presented as lun 2 on host_grp 3 on port CL1-A and 00:02:00 on the remote array presented to lun 5 in group 2 presented on port CL2-B. You will see bellow how to obtain those numbers.

So before you start the replication setup, make sure you collect all this data. On a USP to retrieve the host_grp number and lun number use the Go->Lun Manager view. Navigate to the port where you know your S-VOL was mapped, then click on the host name (or generic port host group if not mapping to a host - host group will be 0 in this case) then you should be able to see the lun on the firhgt hand side.

Number 1 in this picture represents the host group number and number 2 represents the lun number in host group.

pcv2_2

So without future due, here are the steps required to create a replication pair using SVP on VSP.

  1. Open Storage Navigator
  2. Use the Actions menu then navigate to Remote Copy/Universal Replicator/Pair Operationvsp_r0 
  3. Using the menu on the right navigate to the port where the P-VOL is mapped the click on the host. You will see the PVOLS in the right window. The naming convention might be a bit different that what you are accustomed to. Format is [PORT]-[HOST_GRP]-[LUN ON HOST_GRP]. In our case you can see it's CL5-R - 01 - 000 (00:0a:00) so this is telling us is lun number 0 on host 1 mapped to CL5R or lun 00:0a:00. Right click on it and select paircreatepcv1 
  4. Now it's time to specify our destination. Again the destination is in the same format so check your destination first to identify the host_grp number and lun number for the S-VOL. Here is the image from our setup. Number 1 represents the destination Host_Grp and number 2 represents the lun number (position) in that host_grp.As mentioned, select the S-VOL. First group is Port (CL2-A) in our case, second is the hostgroup and the third group is lun number. Next, specify the Master Journal M-JNL (journal group on primary array where journal volumes are) and remote journal R-JNL (journal group on secondary array where the journal volumes are). Consistency group is important (CG Group) if you have multiple luns that have to be in a consistency group, make sure all of them share the same CT Group.pcv3

    Next, you need to specify the path that is going to be used by replication (identified by the s/n of the remote array). Once done click Set.
  5. You will be taken back to the main menu, don't forget to click Apply to apply your changes.pcv4

     

  6. Your pair status will change from SMPL to COPY and when done to PAIR.vsp_r7

     

  7. If you wish to see what is the status of the Pair, right click on the P-VOL then select Detailed Information. You will see all the pertaining information for the replication pairfeat

At this point you can split the pairs and mount the svol if needed

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