Inspur 3408 Series, Configuration Manual

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0). However, RAID 0 cannot ensure data security since it does not support data
redundancy, and therefore is applicable only to scenarios that require high I/O
performance but low data security.
Figure 1-1 RAID 0
1.2.2 RAID 1
RAID 1 is also referred to as mirroring. In a RAID 1 array, each data drive has a
mirrored drive. Data is written to both data and mirrored drives simultaneously,
and is read only from the data drive. If a data drive fails, data will be read from its
mirrored drive. After the failed drive is replaced, data can be rebuilt from the
mirrored drive. RAID 1 features high reliability but its effective capacity is half of the
total drive capacity. It applies to scenarios where high fault tolerance is required,
such as finance, banking, etc.
Figure 1-2 RAID 1
1.2.3 RAID 5
RAID 5 consists of rotating parity and independent access. The parity information is
evenly distributed to all drives in the array by certain rules instead of being written
to a fixed drive. Therefore, each drive contains both data information and parity