New array running # df -hFilesystem Size Used Avail Use% Mounted on/dev/md0 1.5T 198M 1.5T 1% /mnt/storage # cat /proc/mdstatPersonalities : [raid6] [raid5] [raid4]md0 : active raid5 sde1[3] sdd1[2] sdc1[1] sdb1[0] 1562834944 blocks level 5, 64k chunk, algorithm 2 [5/4] [UUUU_] Now to just get the extra drives in and get that closer to 2T.