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2.4 RAID Configuration
The RAID configuration in the disk array unit can be used in the combinations shown in the table
below.
RAID level
RAID1
RAID5
RAID6
*1
RAID10 RAID50
Number of logical drives in
configuration
1+1
4+1
6 to 240
2x2 6x2
3x2 7x2
4x2 8x2
5x2
5x2, 5x4
Number of logical drives per
subsystem
1,024 maximum
Storage capacity per logical drive
(When a 73-GB disk drive is used)
71.6GB 286.4GB
286.4GB
to 13TB
143.2GB to
572.8GB
572.8GB to
1145.6GB
* A combination of disk drives of the same capacity and same rotational speed is required for configuring logical
drives.
*1 Two modes (66%-mode and 80% mode) can be selected according to capacity efficiency.
The RAID levels have the following characteristics.
Level Function
Advantage
Disadvantage
RAID1 Mirroring
High
reliability
High
cost
RAID5
Striping of data and
redundant data
High capacity efficiency
Low-speed data
writing
RAID6
Striping of data and
redundant data
High reliability that allows continuous
operation even with multiple HDD
failures.
Capacity can be expanded for every
drive.
Low-speed data
writing
RAID10
Striping of RAID-1
High-speed data read/write
High cost
RAID50
Striping of RAID-5
High-speed data read
High capacity efficiency
High implementation
cost
Summary of Contents for NF2900-SR40E
Page 8: ...v ...
Page 9: ...vi ...
Page 10: ...vii ...
Page 13: ...x NF2900 SR40E ...
Page 24: ...7 ...
Page 43: ...26 ...
Page 52: ...35 Sample configuration 1 NF2900 SR40E NF2900 SP02E NF2500 SE42E 16 ...
Page 65: ...48 capacity and rotational speed be used together ...
Page 76: ...59 Be careful as this may be hot ...
Page 80: ...63 Note The figure above indicates the addition of NF2900 SC01E ...