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Thecus Technology i Series User Manual

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iSCSI 
I
nternet Small Computer Systems Interface. 
CHAP 
C
hallenge  Handshake  Authentication  Protocol. An optional 
security mechanism to control access to an iSCSI storage 
system over the iSCSI data ports. 
iSNS
 
I
nternet Storage Name Service. 
 
1.3  RAID levels 
 
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. 
JBOD 
The abbreviation of “Just a Bunch Of Disks”. JBOD needs at 
least one hard drive. 
 
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