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RAID 5 or 6 maybe with 6 drives?
First before doing anything, do you have reliable tested backups in place for the data on the drives?
Hardware RAID is pretty difficult to work with, if the RAID controllers are the same model with the same firmware moving the drives should in theory work.
Do you have spare drives to test? Can be really small or mismatched, it's just for testing.
The idea is as follows: make the exact same RAID with the old controller on test drives, then put them in the target controller with hopefully the same settings and see if it's happy. Make sure to have some large files with known checksums on it, just to test if the data is correct and not corrupted in subtle ways.
If it works, then it should work with the real drives. If it doesn't, good luck.
Also RAID 1 with 6 drives doesn't really make sense. RAID 1 would be mirrors, and if your data had 6 copies I think you'd care way too much about your data to even consider doing this. Probably RAID 5/6/10, which adds parity and striping to the mix which does significantly increase the chances of incompatibility.