Migration from RAID5 to RAID6

[Ole Magnus Waaler]

I believe you can do this with some of the RAID vendors without losing your data - please contact the RAID vendor to be 100%

I would do the synchronous replication first before the RAID 5 to 6 that way you will have a copy of your data and if something happens with the upgrade to RAID 6 you can write to that server until the RAID 6 is resolved.
synchrounous replication
synchrounous replication

Thanks for your answer.

If i upgrade the LUN to be bigger, how can i synchronize the data back from SAN2s storage which is then a little smaller? Can i use asynchronous replication to replicate to a bigger storage? Or how would i then move the data from SAN2 to SAN1?