D-Link DSN-6110 User Manual for DSN-6110 & DSN-6110 with DSN-610 - Page 10

RAID levels

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MPIO MC/S MTU CHAP iSNS Multi-Path Input/Output. Multiple Connections per Session Maximum Transmission Unit. Challenge Handshake Authentication Protocol. An optional security mechanism to control access to an iSCSI storage system over the iSCSI data ports. Internet Storage Name Service. • Part 3: Dual controller SBB Storage Bridge Bay. The objective of the Storage Bridge Bay Working Group (SBB) is to create a specification that defines mechanical, electrical and low-level enclosure management requirements for an enclosure controller slot that will support a variety of storage controllers from a variety of independent hardware vendors ("IHVs") and system vendors. 1.2.2 RAID levels There are different RAID levels with different degree of data protection, data availability, and performance to host environment. The description of RAID levels are on the following: RAID 0 RAID 1 N-way mirror RAID 3 RAID 5 RAID 6 RAID 0+1 RAID 10 Disk striping. RAID 0 needs at least one hard drive. Disk mirroring over two disks. RAID 1 needs at least two hard drives. Extension to RAID 1 level. It has N copies of the disk. Striping with parity on the dedicated disk. RAID 3 needs at least three hard drives. Striping with interspersed parity over the member disks. RAID 3 needs at least three hard drives. 2-dimensional parity protection over the member disks. RAID 6 needs at least four hard drives. Mirroring of the member RAID 0 volumes. RAID 0+1 needs at least four hard drives. Striping over the member RAID 1 volumes. RAID 10 needs at least four hard drives. 10

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10
MPIO
M
ulti-
P
ath
I
nput/
O
utput.
MC/S
M
ultiple
C
onnections per
S
ession
MTU
M
aximum
T
ransmission
U
nit.
CHAP
C
hallenge
H
andshake
A
uthentication
P
rotocol. An optional
security mechanism to control access to an iSCSI storage system
over the iSCSI data ports.
iSNS
I
nternet
S
torage
N
ame
S
ervice.
•
Part 3: Dual controller
SBB
S
torage
B
ridge
B
ay. The objective of the Storage Bridge Bay
Working Group (SBB) is to create a specification that defines
mechanical, electrical and low-level enclosure management
requirements for an enclosure controller slot that will support a
variety of storage controllers from a variety of independent
hardware vendors (“IHVs”) and system vendors.
1.2.2
RAID levels
There are different RAID levels with different degree of data protection, data availability,
and performance to host environment. The description of RAID levels are on the following:
RAID 0
Disk striping. RAID 0 needs at least one hard drive.
RAID 1
Disk mirroring over two disks. RAID 1 needs at least two hard
drives.
N-way
mirror
Extension to RAID 1 level. It has N copies of the disk.
RAID 3
Striping with parity on the dedicated disk. RAID 3 needs at least
three hard drives.
RAID 5
Striping with interspersed parity over the member disks. RAID 3
needs at least three hard drives.
RAID 6
2-dimensional parity protection over the member disks. RAID 6
needs at least four hard drives.
RAID 0+1
Mirroring of the member RAID 0 volumes. RAID 0+1 needs at
least four hard drives.
RAID 10
Striping over the member RAID 1 volumes. RAID 10 needs at
least four hard drives.