Contemporary disc systems of RAID
The best measure of reliability has RAID-6, together with significant redundancy
(50%), this configuration uses a powerful code-protection that ensures the
reliability, several orders of magnitude greater than the reliability RAID-0.
Full redundancy RAID-1 makes a very good time to refuse developments, although
less markedly than that of RAID-6. Good specifications are RAID-3 and RAID-5.
Identical values in the art of time waiver for these configurations due to the
fact that in terms of reliability, they absolutely identical-redundancy is 25%,
and recovery methods match. Given the absolute refusal to time developments, we
can see that the reliability of any of the following configurations (with the
exception of RAID-0) will satisfy almost any user. Productivity. Productivity is
heavily dependent on the structure of data flow, the ratio determined by the
number of inquiries read / write, the ratio of segments on the disk size and
length arrays. Frequently invited to assess the performance of devices on
behavior RAID- curves response to a request depending on the value of the
coefficient of input / output, as expressed in the number of requests exchange
unit time. Type of these curves is heavily dependent on the ratio of the volume
of data transmitted on demand, and segment length. Family Discusses two curves:
one for requests with a relatively small amount of data transmitted and the
second for queries with the amount exceeding the size of the segment. A
characteristic feature of these curves is an express station, the appropriate
load, in which the number of inquiries carried out by an array per unit of time
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