raid01 raid10

RAID01 - stripe를 mirror함

RAID10 - mirror를 stripe함

RAID01은 stripe가 깨지면 mirror를 통해 복구를 하지 못한다고 하는데..

생각대로라면.. mirror로 인해 stripe 깨진게 복구 되어야 하는게 아닌가?

아무튼.. 많이 보던게 01이 아니라 10 인것을 봐서는

안정성에서 01이 10에 밀리는게 맞을지도?

[링크 : http://serverfault.com/questions/145319/is-there-a-difference-between-raid-10-10-and-raid-01-01]

[링크 : http://aput.net/~jheiss/raid10/]

RAID 01, also called RAID 0+1, is a RAID level using a mirror of stripes, achieving both replication and sharing of data between disks.[3] The usable capacity of a RAID 01 array is the same as in a RAID 1 array made of the same drives, in which one half of the drives is used to mirror the other half. (N/2) \cdot S_{\mathrm{min}}, where N is the total number of drives and S_{\mathrm{min}} is the capacity of the smallest drive in the array.[4] At least four disks are required in a standard RAID 01 configuration, but larger arrays are also used.

RAID 10, also called RAID 1+0 and sometimes RAID 1&0, is similar to RAID 01 with an exception that two used standard RAID levels are layered in the opposite order; thus, RAID 10 is a stripe of mirrors.[3] RAID 10, as recognized by the storage industry association and as generally implemented by RAID controllers, is a RAID 0 array of mirrors, which may be two- or three-way mirrors,[6] and requires a minimum of four drives. However, a nonstandard definition of "RAID 10" was created for the Linux MD driver;[7] Linux "RAID 10" can be implemented with as few as two disks. Implementations supporting two disks such as Linux RAID 10 offer a choice of layouts.[7] Arrays of more than four disks are also possible. 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]

[링크 : https://en.wikipedia.org/wiki/Nested_RAID_levels]

    [링크 : https://en.wikipedia.org/wiki/Nested_RAID_levels#RAID_01_.28RAID_0.2B1.29]

    [링크 : https://en.wikipedia.org/wiki/Nested_RAID_levels#RAID_10_.28RAID_1.2B0.29]

[링크 : https://en.wikipedia.org/wiki/Standard_RAID_levels]