Replication

How to determine what HORCM instances are running.

horcmwindows

Our environment grew quite a bit over the past time so now we have too many arrays and relationships between then and it was getting out of control. We had to come up with a standardization. We came up with a logical way of getting our horcm instances numbered and we chose a 3 digit horcm number in the format ABC ...

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HUR step-by-step config

feat

Hitachi Universal Replicator is Hitachi's solution to async replication. Their implementation thought is a bit different then other solutions like EMC's recoverpoints. Yes, they do use journals as well, but they will only use them if needed. To setup HUR you will need two HDS enterprise class arrays (VSP, USPV's) and dedicated parity groups for journals. I strongly recommend that ...

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HUR – create a replication pair

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 ...

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Setting up truecopy between two VSP arrays

This article is a how-to on setting up replication between 2 enterprise class arrays using TrueCopy. Remember that replication in HDS in unidirectional so setting this from Array A to array B does not mean that array B will be able to replicate data to Array A. You will need 2 type of ports for this replication. The source array ...

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TrueCopy states

TrueCopy states

Normaly in a truecopy replication state we see different codes telling us teh health of the pairs. Here are the most common ones. Don't forget that P-VOL represents the primary volume (the one being replicated) and the S-VOL represents the secondary volume (the one replicating to). TrueCopy states Here are the status states for paircreate/pairsplit and parresync Here is the ...

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Overview of insystem replication

Here is another great document (given a bit old from a how-to perspective) that HDS put together to explain the main differences between ShadowCopy and CopyOnWrite Insystem replication http://www.hds.com/groups/public/documents/webasset/system-replication.html?M=insystem-replication-demo

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