Netware 6 NSS volume expansion


I have a HP ML370 G3 with a HP Smart Array 532 controller. I have 6 drives with 5 of them in a RAID 5 array and 1 online spare. I need to increase the size of the NSS pool. SYS volume is on this array too. I would like to remove the online spare and add it to the existing array and then add the additional capacity to the pool. I believe I "should" be able to this live without data loss. Obviously I would not try this without a backup. Any thoughts for or against my plan? Thanks in advance.