User manual

- 66 -
•
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.
RAG362