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What is raid ?

Discussion in 'Computer & IT Forum' started by just in hell, Mar 7, 2010.

  1. just in hell

    just in hell New Member

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    RAID: Redundant Array of Independent (or Inexpensive) Disks. Type of disk, often used on servers, where several physical disks are combined into an array for better speed and fault tolerance.
    Level 0 implements data striping where file blocks are written to separate drives. Does not provide fault tolerance, because failure of one drive will result in data loss.
    Level 1 implements data mirroring. Data is duplicated on two drives either through software or hardware. Provides faster read performance than a single drive.
    Level 2 - not used in practice. Data is split at bit level at written to multiple drives.
    Level 3 - requires at least 3 drives. Data block is striped at byte level across drives and error correction codes (parity info) is recorder on another drive. Provides fault tolerance but slower writing performance.
    Level 4 - Similar to Level 3 but provides faster performance because it uses blocks for striping.
    Level 5 - Similar to Level 4 but improves performance but also striping parity info across multiple drives.
    Level 6 - Similar to Level 5 but also uses second parity scheme for better fault tolerance.
    Level 7 - Proprietary RAID design by Storage Computer Corporation. Faster than other levels because it uses multiple levels of cache and asynchronous I/O transfers.
    In addition multiple RAID levels can be combined to improve performance or reliability.
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  2. tulipkiya

    tulipkiya Member

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    That one i alwasy heard..but never knew this much about it...thanks man....for the good addon knowledge.
  3. syeds

    syeds New Member

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    raid??????
  4. fizzer

    fizzer Member

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    still didn't get what the hell this raid si,,,,,,,,,,,,?
  5. signity

    signity New Member

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    Nice info and is really interesting. Thanks!
  6. zslwork

    zslwork Member

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    but now a days after arrival of new SATA drives makes this technique more reliable and worth able.
    this makes the new generation computer in the market
  7. dellinqwartz

    dellinqwartz New Member

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    Raid is Short for Redundant Array of Independent Disks, a class of dicks drives that apply two or added drives in aggregate for accountability altruism and performance. RAID disc drives are acclimated frequently on servers but aren't about all-important for claimed computers. RAID allows you to store the same data redundantly in a balanced ay to improve overall performance.
  8. paullopez

    paullopez Member

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    To know more about RAID Drives; just follow the below URL of wikipedia. I am sure you will get the answer rest of your all questions related to RAID.

  9. fizzer

    fizzer Member

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    I searched in google and then found out that only there are 6 raid levels and we have 01,10 raids.
    So, from does level from ? Is it 10 or 01 or something else ?
  10. devileye

    devileye Active Member

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    i really did not know about it.so thank you very much for sharing this thread here.
  11. egrovesys

    egrovesys Member

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    RAID (redundant array of independent disks) is a way of storing the same data in different places on multiple hard disks.
  12. Gurmeet

    Gurmeet Member

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    Very interesting information you have shared. Thanks a lot.
  13. Chikan

    Chikan Guest

    Excellent post. I liked the information very much which you have shared. It is very useful. Thanks a lot.
  14. semaphore.v

    semaphore.v Member

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    RAID is now used as an umbrella term for Computer data storage schemes that can divide and replicate data among multiple physical drives.
  15. davidsmith

    davidsmith Member

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    RAID (redundant array of independent disks; originally redundant array of inexpensive disks) is a way of storing the same data in different places (thus, redundantly) on multiple hard disk.
  16. rankmedia90

    rankmedia90 New Member

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    Nice info about Raid, thanks for sharing it.

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