I have an HP Proliant DL380 running a RAID 5 with 147GB drives (2-data, 1-parity and 1-spare). I just added 2 more drives and was able to add the drives to the existing logical drive using the HP Array Configuration Utility. Windows recognizes and shows all of the new drive space as unallocated. What is the best (and easiest method) of adding the unallocated drivespace to the existing partition C: without losing the existing data and while unit remains in production. The server is in a file server role for about 150 employees though I estimate only about 40-50 maybe accessing their network share at any given moment. Live State Recovery is run daily backing up data to a backup server. Weekend implementation is possible to minimize I/O from users. Any suggestions for combining the Primary (and only) partition with the unallocated space?