RAID-5 Array State Flowchart
Second
diskfailsor
isremoved
Writeoperation ArrayOffline
Newdisk
Originaldisk
replaced
Y
Y
Array
enabledfor
HotSpare
HotSpare
swappedin
HotSpare
available
Array
Rebuilding
Allow
Writewhile
Exposed
WriteOp
rejected
ArrayDegraded
(noprotection)
N
N
N
Y
Y
Y
N
N
Diskfails
Diskrejected
ArrayDegraded
ArrayGood
Disk
isremoved
ArrayExposed
Figure 15. RAID-5 Array State Flowchart
Chapter 3. RAID Functions and Array States 35