RAID level | Select the level of RAID. Options include: • RAID-0 — (striping) better performance, no redundancy • RAID-1 — (mirroring) half the storage capacity, with redundancy • RAID-5 — striping with parity checking, and redundancy Available RAID level options depend on the available number of hard disks. Two or more disks are required for RAID 0 or RAID 1. Three or more disks are required for RAID 5. Changing the RAID level will erase any stored log information on the array, and reboot the FortiGate unit. The FortiGate unit will remain offline while it reconfigures the RAID array. When it reboots, the array will need to synchronize before being fully operational. |
Status | The status, or health, of RAID array. This status can be one of: • OK — standard status, everything is normal • OK (Background-Synchronizing) (%) — synchronizing the disks after changing RAID level, Synchronizing progress bar shows percent complete • Degraded — One or more of the disks in the array has failed, been removed, or is not working properly. A warning is displayed about the lack of redundancy in this state. Also, a degraded array is slower than a healthy array. Select Rebuild RAID to fix the array. • Degraded (Background-Rebuilding) (%) — The same as degraded, but the RAID array is being rebuilt in the background. The array continues to be in a fragile state until the rebuilding is completed. |
Size | The size of the RAID array in gigabytes (GB). The size of the array depends on the RAID level selected, and the number of disks in the array. |
Rebuild RAID | Select to rebuild the array after a new disk has been added to the array, or after a disk has been swapped in for a failed disk. If you try to rebuild a RAID array with too few disks you will get a rebuild error. After inserting a functioning disk, the rebuild will start. This button is only available when the RAID array is in a degraded state and has enough disks to be rebuilt. You cannot restart a rebuild once a rebuild is already in progress. Note: If a disk has failed, the number of working disks may not be enough for the RAID level to function. In this case, replace the failed disk with a working disk to rebuild the RAID array. |
Disk# | The disk’s position in the array. This corresponds to the physical slot of the disk. If a disk is removed from the FortiGate unit, the disk is marked as not a member of the array and its position is retained until a new disk is inserted in that drive bay. |
Status | The status of this disk. Options include OK, and unavailable. A disk is unavailable if it is removed or has failed. |