L2 - T2B - S4 - Redundant Array of Independent Disks (RAID)

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Redundant array of independent disks (RAID)

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Specifications that use multiple storage devices to protect against data loss in the event of device failure

  • Redundancy sacrifices some disk capacity but provides fault tolerance

    • Inversely related

  • ____ array appears as a single storage resource, or volume to the OS

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RAID Level

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Represents a drive configuration with a given type of fault tolerance

  • Numbered from 0 to 6

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8 Terms

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Redundant array of independent disks (RAID)

Specifications that use multiple storage devices to protect against data loss in the event of device failure

  • Redundancy sacrifices some disk capacity but provides fault tolerance

    • Inversely related

  • ____ array appears as a single storage resource, or volume to the OS

2
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RAID Level

Represents a drive configuration with a given type of fault tolerance

  • Numbered from 0 to 6

3
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True

  • Such as RAID 10 (RAID 1 + RAID 0)

True or False: There are also nested RAID solutions

4
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True

  • The "D" can also stand for "devices"

True or False: RAID can also be said to stand for "Redundant Array of Inexpensive Disks"

5
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  • Hardware RAID

    • Uses a dedicated controller, installed as an adapter card

  • Software RAID

    • Implemented using features of the operating system

The two types of RAID systems

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Hardware RAID Solutions

  • Uses a dedicated controller, installed as an adapter card

  • The RAID disks are connected to SATA ports on the RAID controller adapter card, rather than to the motherboard

    • Some motherboards implement integrated RAID functionality as part of the chipset

  • Performance differentiated by their support for a range of RAID levels

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<p>True</p><ul><li><p><span><u>Entry-level controllers</u> might support only <u>RAID 0 or RAID 1</u></span></p></li><li><p><span><u>Mid-level controllers</u> might add support for <u>RAID 5 and RAID 10</u></span></p></li></ul><p></p>

True

  • Entry-level controllers might support only RAID 0 or RAID 1

  • Mid-level controllers might add support for RAID 5 and RAID 10

True or False: Hardware Raid Solution performance is differentiated by their support for a range of RAID levels

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Hardware RAID is often able to ____ a damaged disk

  • Means that the failed device can be replaced without shutting down the operating system