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JBOD

Show me everything on Disk drives

- JBOD (for "just a bunch of disks," or sometimes "just a bunch of drives") is a derogatory term - the official term is "spanning" - used to refer to a computer's hard disks that haven't been configured according to the RAID (for "redundant array of independent disks") system to increase fault tolerance and improve data access performance.

The RAID system stores the same data redundantly on multiple disks that nevertheless appear to the operating system as a single disk. Although, JBOD also makes the disks appear to be a single one, it accomplishes that by combining the drives into one larger logical one. JBOD doesn't deliver any advantages over using separate disks independently and doesn't provide any of the fault tolerance or performance benefits of RAID.

Learn more about Disk drives

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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.

LAST UPDATED:

30 Jan 2001

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More resources from around the web:

-	PCGuide offers more information about JBOD and RAID.

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