Raid faq

6
FAQ | RAID
RAID 1E–Createsamirrorofastripeonanadjacentdrivesuchthatifanyonedrivefails,thereisacopyofitsstripes
ononeoftheotherdrives.ARAID1Erequiresanoddnumberofphysicaldriveswithathreedriveminimum.RAID1E
issimilartoRAID10.ItisslightlyfasterthanaRAID1(mirrored)arrayandprovidesexcellentredundancy.RAID1Ewill
toleratemultiplediskfailuresaslongastheyarenotadjacent.ThemainadvantageofRAID1Eisdataintegrity.
RAID 50–orRAID5+0createsasinglestripedvolumeacrosstwoRAID5arrays,essentiallycombiningblock-
levelstripingofRAID0withthedistributedparityofRAID5.Itrequiresaminimumof6disks.Itprovidesbetterdata
redundancy,betterdataintegrityandthecapabilitytotolerateupto2diskfailuresaslongastheyarenotpartofthe
same mirrored set.
A
B
C
D
A
C
D
F
B
A
E
D
C
B
F
E
Logical disk
RAID 1E disk array
RAID 50 disk array
A
B
C
D
E
F
Logical disk
A, B
E, F
I, J
M, N
B
I
N
A
E
M
C
G
O
C, D
G, H
K, L
O, P
F
J
D
K
P
H
L
Striping
Parity Parity
ParityParity
Parity Parity
ParityParity
Raid5array Raid5array