I have one of those simple questions to which Mr Google refuses to find an answer

.
I've had a hard drive failure and I've decided to replace the old drive with a Level 1 RAID. I've read up on mdadm and it all sounds easy peazy - except for one issue

. I use Linux Mint but I also have OpenSuSE installed on a separate partition in case Mint falls over. And it has been useful. So, if I have mdadm installed on both OSes can they both access and read/write to the array? I can find plenty of articles on allowing Windows and Linux to access an array but nothing about two flavours of Linux. Since the superblock is common across Linux I think it should work. Does anyone know for sure?
PS The Raid is for data storage, not for booting.