Raid.comparison.chart - D-Link ShareCenter Quattro DNS-345 User Manual

Section 4 - Configuration
RAID level
Standard
JBOD
RAID 0
RAID 1
RAID 5
RAID 5+Spare
RAID 10
D-Link ShareCenter Quattro DNS-345 User Manual
RAID Comparison Chart
Minimum Drives Protection
1 None
1 None
2 None
2 Single drive failure
3 Single drive failure
3 Single drive failure
4 1 Disk per mirrored
stripe
Description Strengths
C r e a t e s a s i n g l e Saves on costs
volume for one drive
or several drives
Allows you to create a Saves on costs
large virtual disk drive
by concatenating two
or more smaller drives
together.
Data striping without High Performance
redundancy
Disk mirroring High data protection
Block-level data High data protection,
striping with support multiple
distributed parity simultaneous reads
and writes
Data striping across High data protection.
all drives.
Combination of RAID Highest data
0 (data striping) and protection, can
RAID 1 (mirroring) tolerate multiple
drive failures.
Weaknesses
No data protection
like proper RAID
No redundancy
and limited data
protection.
No data protection,
one drive fails, all is
lost
High redundancy
cost because all
data is duplicated,
twice the storage
capacity is required
Write performance is
slower than RAID 0
or RAID 1
High redundancy
cost because all
data is duplicated,
twice the storage
capacity is required.
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