Thursday, May 7, 2015

Standard and nested/hybrid RAID levels

[1] http://en.wikipedia.org/wiki/Standard_RAID_levels

It's good to know about RAID levels 1, 2, 3, 4, 5, 6.

[2] http://en.wikipedia.org/wiki/Nested_RAID_levels

For nested RAID levels (hybrid RAID), which combines 2 or more standard RAID levels, there are:
01, 03, 10, 50, 60, 100.

In [2], it says:

According to manufacturer specifications and official independent benchmarks,[8][9][10] in most cases RAID 10 provides better throughput and latency than all other RAID levels except RAID 0 (which wins in throughput). Thus, it is the preferable RAID level for I/O-intensive applications such as database, email, and web servers, as well as for any other use requiring high disk performance.[11]

So RAID 10 seems a widely used configuration.

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