No.  You will have to  reset it, then restore your data.    If you had another array that you could add to this group, you can add it, then delete the original one, which will reset it, then add it back in.  This will preserve all the group info.  
Is it possible to reinitialize the disks without resetting all other member settings to default? This group only contains one member that I want to change from raid 50 to raid 10. All data has already been moved or deleted. Thanks. Tim
Reinitialize disks on PS5000