Amd-raidxpert2 User Guide
Table 9. Failure States by RAID Level
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| Table 9. Failure States by RAID Level
RAID Level This Failure State Is Displayed Whenever RAID1 (Redundant Arrays) Critical A single disk fails. Offline Two disks fail. RAID10 (RAID Levels with Multiple Redundancies) Critical A single disk fails in any one of the sets. Offline All the disks in a set fail. Volume, RAIDABLE and RAID0 Offline A single disk fails. More than one array can be created using the same set of disks. If a disk is disconnected that belongs to more than one array, only the arrays that try to access the disk and receive I/O errors report the failure. For example: there are two arrays, both of which are RAID1 sets, and both use disk 4. If a system that is being used by array 1 receives an I/O error when trying to communicate with disk 4, the state of array 1 changes to Critical. However, the state of array 2 using disk 4 does not change to Critical until an I/O error is reported. If systems using array 1 are not communicating with failed disk 4, the state of array 1 still displays as Normal. If a rescan of all channels is performed after disconnecting a disk, the state of every array using the missing disk changes from Normal to either the Critical or Offline, depending on the RAID level. |