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DASD

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- DASD, pronounced DAZ-dee (Direct access storage device), is a general term for magnetic disk storage devices. The term has historically been used in the mainframe and minicomputer (mid-range computer) environments and is sometimes used to refer to hard disk drives for personal computers. A redundant array of independent disks (RAID) is also a type of DASD.

The "direct access" means that all data can be accessed directly in about the same amount of time rather than having to progress sequentially through the data.

Learn more about Disk drives

Storwize claims good data compression rates, no performance degradation on STN-6000 appliance: Storwize's STN-6000 inline appliance acts on primary storage using real-time compression.
NetApp: Post-process deduplication limits performance hit in primary storage data deduplication: NetApp's approach to primary storage data deduplication limits the performance penalty to about 20% percent.
Best practices for solid-state drive storage technology: SSD best practices center on identifying I/O-intensive applications so that data storage technology can provide the greatest benefit to IT organizations.
Tiered storage tutorial: Find out what tiered storage is, the key technologies behind it, and how tiered storage can lower operational costs while improving application performance.
Podcast: Solid-state drives entering enterprise storage environments: Jeff Janukowicz, research manager at IDC for solid-state drives and hard drive components, discusses the impact SSDs are expected to have at the enterprise level.

CONTRIBUTORS:	Maury Smith
LAST UPDATED:	13 Oct 2006

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More resources from around the web:

-	SearchStorage.com provides news about and selected links to more information about various forms of storage.
-	The Storage Guide at Tom's Hardware site provides an explanation about hard disk drives.

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