topic Re: SAN Replication? in HPE EVA Storage

SAN Replication?

David.Dimbleby — Fri, 06 Feb 2009 15:07:23 GMT

Afternoon.

i) We have 1 x HP MSA2000 based SAN (& SAN switches etc.) that we want to replicate to 1 x HP MSA1000 based SAN for DR purposes.
ii) We have HP Storage Mirroring Software & Licences (Double-Take)
iii) We have HP Data Protector Software & Licences.

I am unsure which method will achieve the desired results as;

1) The only options on the MSA2012 Controller appears to be either Volume Copy else SAN Snapshot, for which we appear to be unlicenced.
2) The HP Storage Mirroring Software appears to only want to mirror/replicate either the Server(s) or selected disks.
3) Only just started playing with the HP Data Protector Software and installed the Cell Management Server, but I can not see any SAN related options that will allow for SAN to SAN replication.

And advice will be appreciated - thanks.

Re: SAN Replication?

Uwe Zessin — Fri, 06 Feb 2009 15:41:39 GMT

Neither the MSA2000/MSA1000 (completely different beasts, btw) nor the Data Protector software can do storage array to storage array replication.

Storage Mirroring is the way to go - apart from whole disks, you can limit the replication to single folder trees, because the software does not work at the block layer - it taps into the file system and replicates changed byte ranges.

Re: SAN Replication?

Malcolm Watts — Thu, 12 Feb 2009 14:54:15 GMT

Storage mirroring supposed to work, I have been trying to get it to work on 2x MSA2000 boxes and 2x servers are running W2K3 SP2. I have 2 active volumes on the 1 MSA and would like the 2x mirror volumes on the 2nd MSA.
when you try to add the Double-Take source connection to the cluster, the cluster admin errors and crashes out.
When setting up the replication set, select "one to one" and put the source as the live MSA drive and the target as the mirror drive on the other MSA, when you specify the source and target servers, being a cluster these could be different depending on fail over of the servers. so would you have to create replication sets to cater for all permutations of where the drives can be?