Direct-access storage device: Difference between revisions
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A '''direct access storage device''', or '''DASD''' ([[International Phonetic Alphabet for English|IPA]] {{IPA|[ |
A '''direct access storage device''', or '''DASD''' ([[International Phonetic Alphabet for English|IPA]] {{IPA|[ˈdæzdi]}}) is a form of magnetic disk storage, historically used in the [[mainframe]] and [[minicomputer]] (mid-range) environments. A [[redundant array of independent disks]] (RAID) is a form of DASD. |
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"Direct access" means that all data can be accessed directly — in a form of indexing also known as "random access" — as opposed to storage systems based on seeking sequentially through the data (e.g., tape drives). |
"Direct access" means that all data can be accessed directly — in a form of indexing also known as "random access" — as opposed to storage systems based on seeking sequentially through the data (e.g., tape drives). |
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* [[Metro Mirror]] |
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image:dasd |
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Revision as of 10:45, 24 July 2006
A direct access storage device, or DASD (IPA [ˈdæzdi]) is a form of magnetic disk storage, historically used in the mainframe and minicomputer (mid-range) environments. A redundant array of independent disks (RAID) is a form of DASD.
"Direct access" means that all data can be accessed directly — in a form of indexing also known as "random access" — as opposed to storage systems based on seeking sequentially through the data (e.g., tape drives).
See also
image:dasd
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