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10
MTU Maximum Transmission Unit.
CHAP
Challenge Handshake Authentication Protocol. An optional
security mechanism to control access to an iSCSI storage system
over the iSCSI data ports.
iSNS 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.
Part 4: 10GbE
SFP+ Small Form-factor Pluggable is a compact, hot-pluggable
transceiver used for both Fibre Channel and 10GbE.
CX4 10GBASE-CX4, a copper based 10 Gigabit Ethernet PHY.
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