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RAID 2, 3, 4 en 53

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  • 102 views sinds 30-01-2008
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Topicstarter
Hallo

Kan iemand mij uitleggen hoe RAID 2, 3, 4 en 53 werken?
Ik heb veel documentatie gevonden over de bekende config's zoals: 0, 1 0+1 en 5, maar nix over de rest van de configuraties.
Heb wel iets gevonden op www.whatis.com en www.acnc.com. maar het zijn erg korte omschijvingen.
Wie o wie kan het mij wel goed uitleggen

  • wildhagen
  • Registratie: Juni 1999
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wildhagen

Blablabla

5. RAID Level 2
RAID 2 spreads both data and parity information across multiple physical disks. RAID 2's data-striping technique doesn't efficiently use disk space and provides little disk space savings compared with full mirroring. RAID 2 implementations are uncommon.

4. RAID Level 3
Like RAID 2, RAID 3 implements data-striping; unlike RAID 2, RAID 3 maintains all parity information on one disk for better performance. RAID 3's disk usage, however, is still inefficient, making implementations rare.

3. RAID Level 4
RAID 4 uses the same data-striping methodology as RAID 2 and RAID 3 but provides better performance by using larger disk blocks. RAID 4 also provides the same single-disk parity storage as RAID 3. Like its RAID 2 and RAID 3 cousins, RAID 4 is inefficient for transaction-based processing.
Bron: http://www.sqlmag.com/Articles/Index.cfm?ArticleID=9697
RAID 53 should be called RAID 03 because it combines the striping of a RAID O array with the parity of a RAID 3 array. RAID 53 requires a minimum of five drives, and the spindles of all the drives in the array must be synchronized. This can severely limit which drives are used and will result in a greater expense than other RAID levels. In a five-drive configuration, RAID 53 stripes the data as sub-blocks to the first two drives along with parity on the third. The last two drives contain the same data striped in a complete block without parity like RAID 0.
Bron: http://www.networkcomputing.com/1220/1220ws22.html

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