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Nested RAID levels, also known as hybrid RAID, combine two or more of the standard RAID levels (where "RAID" stands for "redundant array of independent disks" or "redundant array of inexpensive disks") to gain performance, additional redundancy or both, as a result of combining properties of different standard RAID layouts. [1] [2] Nested RAID ...
The software RAID subsystem provided by the Linux kernel, called md, supports the creation of both classic (nested) RAID 1+0 arrays, and non-standard RAID arrays that use a single-level RAID layout with some additional features. [10] [11]
As it always stripes over top-level vdevs, it supports equivalents of the 1+0, 5+0, and 6+0 nested RAID levels (as well as striped triple-parity sets) but not other nested combinations. ZFS is the native file system on Solaris and illumos, and is also available on FreeBSD and Linux.
Diagram of a RAID 1 setup. RAID 1 consists of an exact copy (or mirror) of a set of data on two or more disks; a classic RAID 1 mirrored pair contains two disks.This configuration offers no parity, striping, or spanning of disk space across multiple disks, since the data is mirrored on all disks belonging to the array, and the array can only be as big as the smallest member disk.
Standard RAID levels, all the RAID configurations defined in the Common RAID Disk Drive Format standard, which is maintained by the Storage Networking Industry Association; Nested RAID levels, RAID configurations that incorporate features of two or more standard RAID levels; Non-standard RAID levels, variants of standard or nested RAID levels ...
Pages in category "RAID" The following 32 pages are in this category, out of 32 total. ... Nested RAID levels; Non-RAID drive architectures; Non-standard RAID levels ...
I moved the IBM RAID controller citation to after the sentence references better throughoutput and latency than other RAID levels. I moved the PC Guide reference about comparing all Nested and regular RAID levels to the end of the sentence where it makes the exception about RAID 0 providing the best throughput but worse latency.
It often implements hardware RAID, thus it is sometimes referred to as RAID controller. It also often provides additional disk cache . Disk array controller is often ambiguously shortened to disk controller which can also refer to the circuitry responsible for managing internal disk drive operations.