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Rebuild operation description:
RAID 0 Disk striping. No protection for data. RG fails if any hard drive
fails or unplugs.
RAID 1 Disk mirroring over 2 disks. RAID 1 allows one hard drive fails or
unplugging. Need one new hard drive to insert to the system
and rebuild to be completed.
N-way
mirror
Extension to RAID 1 level. It has N copies of the disk. N-way
mirror allows N-1 hard drives failure or unplugging.
RAID 3 Striping with parity on the dedicated disk. RAID 3 allows one
hard drive failure or unplugging.
RAID 5 Striping with interspersed parity over the member disks. RAID 5
allows one hard drive failure or unplugging.
RAID 6 2-dimensional parity protection over the member disks. RAID 6
allows two hard drives failure or unplugging. If it needs to
rebuild two hard drives at the same time, it will rebuild the first
one, then the other in sequence.
RAID 0+1 Mirroring of RAID 0 volumes. RAID 0+1 allows two hard drive
failures or unplugging, but at the same array.
RAID 10 Striping over the member of RAID 1 volumes. RAID 10 allows
two hard drive failure or unplugging, but in different arrays.
RAID 30 Striping over the member of RAID 3 volumes. RAID 30 allows
two hard drive failure or unplugging, but in different arrays.
RAID 50 Striping over the member of RAID 5 volumes. RAID 50 allows
two hard drive failures or unplugging, but in different arrays.
RAID 60 Striping over the member of RAID 6 volumes. RAID 60 allows
four hard drive failures or unplugging, every two in different
arrays.
JBOD The abbreviation of “Just a Bunch Of Disks”. No data
protection. RG fails if any hard drive failures or unplugs.