Shouldn't the size of the array be around 760GB? It says spare device 0. /dev/md0: Version : 00.90.01 Creation Time : Mon Dec 12 15:56:58 2005 Raid Level : raid5 Array Size : 586075008 (558.92 GiB 600.14 GB) Device Size : 195358336 (186.31 GiB 200.05 GB) Raid Devices : 4 Total Devices : 4 Preferred Minor : 0 Persistence : Superblock is persistent Update Time : Tue Dec 13 09:59:54 2005 State : clean Active Devices : 4 Working Devices : 4 Failed Devices : 0 Spare Devices : 0 - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html