We have a PE2850 with PERC 4e. Last week I added a sixth drive to the exiting RAID 5. I follow steps found right here on EE and even rebooted the server. Now Dell OpenManage Server Administrator show the additional drive space on the array, but W2K3 does not. Disk manager show the unallocated space just like every other post here. I have seen several posts in my quest for the answer relating to diskpart, and other partition utilities. I am running a consistency check right now. Any thoughts as to the safest way to address this. I have a full backup of all the data, but would realy hate to have to restore it. NON DATA LOSS would be fantastic.