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RAID
0 |
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Striping at the block level occurs across at least 2
drives with no redundancy |
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Advantages |
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Easy to
put into operation, more efficient, all storage capacity
can be used |
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Disadvantages |
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All data
lost if one drive fails |
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RAID 1 |
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Pairing and mirroring occurs using at
least 2 drives and the data is 100% duplicated |
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Advantages |
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Very fast
operations, simple to use, data can be saved if one
drive fails |
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Disadvantages |
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Expensive
because data is written twice which cuts storage
capacity in half |
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RAID 3 |
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Striping
occurs across several drives and is
written in parallel with parity information stored on
one drive |
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Advantages |
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Supports
large data transfers |
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Disadvantages |
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Complex
and can only handle one input/output request at a time |
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RAID 5 |
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Striping not in parallel occurs across
multiple drives and parity information is spread among
all the drives |
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Advantages |
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Cost
effective, efficient |
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Disadvantages |
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Poor write
performance, complex |
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RAID 10 |
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A combination of RAID 0 striping and RAID
1 mirroring providing the security of data redundancy |
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Advantages |
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Very high
input/output rates, good for databases requiring high
performance |
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Disadvantages |
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Expensive because
data is written twice cutting storage capacity in half |
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JBOD |
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Not actually a RAID
level- "Just A Bunch Of Disks" represents a collection
of disks that
function independent of one another but may appear to be
a RAID |
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Advantages |
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Avoids drive waste
and offers easier data recovery in the event of a
RAID failure |
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Disadvantages |
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Does not provide the
fault tolerance or performance of RAID
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