RecoverPoint Fake Volume Size Error
Posted: June 22, 2011 Filed under: Uncategorized 3 Comments »UPDATE: It does appear that 3.3SP1 and newer versions of RecoverPoint support larger replica volumes using the CX splitter, however FLARE 30 or above is required. If using any FLARE code prior to 30 then source and target volumes must be identical regardless of the RecoverPoint version.
I’ve ran into this a couple of times recently where the CLARiiON splitter throws an error when trying to use a target LUN that is larger than the source. It appears that the CX splitter only supports source and replica LUNs of identical size. According to EMC primus 203095, fabric and host splitters do support a larger target LUN. This only applies if FLARE has not yet been upgraded to 30. FLARE 30 and RP3.3SP1 or above is required to use larger replica LUNs with the CX splitter. I’m definitely partial to using the array splitter due to performance and ease of use so this is a pretty big limitation from my perspective. I would be interested to hear if EMC is planning to have future array splitters support larger target LUNs.
With the later versions of the flare code and updated RP 3.3.x this no longer is the case,
you will see a message stating the selected volume is larger than the production volume. To enable failover the extra capacity will not be used.
At this point you can continue.. or Choose a lun of a different size.
From RP release Notes …
RecoverPoint and RecoverPoint/SE 3.3 SP1 implement “fake sizing” for CLARiiON splitter environments. It is no longer required that a replica volume added to replication set be exactly the same size as the production volume it is replicating. If an exact size volume is not available, a volume that is larger than the production volume can be used as the replica volume instead.
I will comment on the solution and have EMC support update this
RandomPunter
Thanks for the information. I’ve actually encountered this issue with 3.4, however flare code was not at 30 yet. I think the key here is that flare 30 is used in conjuction with 3.3SP1 or above to take advantage of larger replica LUNs.