Tuesday, September 21, 2010

What is RAID 0? What does it do?


What is RAID 0? What does it do?

RAID 0 implements a striped disk array, the notes is broken down into blocks and each block is written to a separate disk drive



I/O actions is greatly improved by spreading the I/O nouns across many channel and drives





Best performance is achieve when data is striped across multiple controllers near only one drive per controller





No balance calculation overhead is involved





Very simple design





Easy to implement
Raid 0 is a route to combine hard disks next to a technology called striping. It spreads the facts across multiple hard drives.



Usually, you want to do RAID 5. This give you fault tolerance. One drive is unused contained by the total bytes, but holds parity information. If one drives fail, you can replace it, and the array will keep going lacking losing data. RAID 0, however is striping WITHOUT egalitarianism. So, there is NO bad habit tolerance to it. Usually, RAID 0 is only used for DB servers, as it is faster (because, contained by theory, it can read to one drive while writing to another).



The other option are RAID 5, which is a mirror. (a complete copy of one drive is stored on another in shield of failure) or RAID 10, which is mirrored RAID 5

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