11
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.
RAID 30
Striping over the member RAID 3 volumes. RAID 30 needs at
least six hard drives.
RAID 50
Striping over the member RAID 5 volumes. RAID 50 needs at
least six hard drives.
RAID 60
Striping over the member RAID 6 volumes. RAID 60 needs at
least eight hard drives.
JBOD
The abbreviation of
“J
ust a
B
unch
O
f
D
isks
”
. JBOD needs at
least one hard drive.
1.2.3
Volume relationship
Содержание P300H61
Страница 27: ...27 Figure 2 5 2 The following topology is the connections for console and UPS optional Figure 2 5 3 ...
Страница 79: ...79 ...
Страница 110: ...110 Figure 5 7 1 2 ...
Страница 145: ...145 This form can be got from QSAN ftp ftp ftp qsan com tw QSAN_Support_Form doc ...
Страница 148: ...148 Figure B 1 3 Click Done Figure B 2 Figure B 3 ...
Страница 151: ...151 Figure B 8 Figure B 9 15 Click Add 16 Click Advanced ...
Страница 153: ...153 Figure B 14 22 Done the iSCSI device disconnect successfully ...
Страница 154: ...154 System information P300H61 P300H71 SW version 2 0 1 ...