Linux Small Knowledge Translation-"raid"

Recently the term "raid" has become more famous. "raid" is a technique used to combine multiple HDDs to improve storage reliability.

So, do you know anything about the "raid" of "raid 0""raid 1""raid 5" in RAID?

The easiest thing to understand in RAID is "raid 1" (mirror). The so-called Mirror ("raid"), is to write the same content to multiple devices, even if a device fails, but as long as there is a device is good, do not worry about data loss.

RAID starts from "raid 0" and is divided into 7 categories, up to "raid 6".

In addition to the previously mentioned "raid 1", there are

"raid 0", the data is scattered evenly across multiple disks, so that when reading and writing data, you can concurrently operate on multiple disks. Realize the high speed of reading and writing.

"raid 5", the data is distributed across multiple disks by means of parity characters.

In summary, RAID is more than just a mirrored storage (RAID 0). You can also mix "raid 0" and "raid 1" for the first time.

RAID is a system that was actually advocated in a paper published in 1988. In this paper, "raid 1" to "raid 5" are advocated.

RAID is divided into 7 types, but due to performance and reliability than "raid 5", "raid 3" and "raid 4" are now basically no longer used. So there is a lack of "raid 3" and "raid 4" situation.

Recently, due to the decline in hard drive prices, many people have started using RAID technology. It is not difficult to understand, the introduction of use is more convenient, if there is a chance we can also try!

Added: RAID is an abbreviation for redundant Arrays of inexpensive Disks, and Chinese is generally translated as "redundant disk array"