Red Hat Enterprise Linux 5 Administration Unleashed

Understanding RAID 183Device Size : 10241280 (9.77 GiB 10.49 GB)Raid Devices : 3Total Devices : 4Preferred Minor : 0Persistence : Superblock is persistentUpdate Time : Mon Dec 18 07:40:01 2006State : clean, degraded, recoveringActive Devices : 2Working Devices : 3Failed Devices : 1Spare Devices : 1Rebuild Status : 49% completeUUID : be623775:3e4ed7d6:c133873d:fbd771aaEvents : 0.5Number Major Minor RaidDevice State3 8 8 0 spare rebuilding /dev/sda81 8 6 1 active sync /dev/sda62 8 7 2 active sync /dev/sda74 8 5 - faulty spare /dev/sda5. mdadm --examine : Displays detailed data about a component of a RAIDarray such as RAID level, total number of devices, number of working devices, andnumber of failed devices. For example, the output of mdadm --examine /dev/sda6shows the following:7/dev/sda6:Magic : a92b4efcVersion : 00.90.00UUID : be623775:3e4ed7d6:c133873d:fbd771aaCreation Time : Mon Dec 18 07:39:05 2006Raid Level : raid1Device Size : 10241280 (9.77 GiB 10.49 GB)Array Size : 10241280 (9.77 GiB 10.49 GB)Raid Devices : 3Total Devices : 4Preferred Minor : 0Update Time : Mon Dec 18 07:40:01 2006State : activeActive Devices : 2Working Devices : 3