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RAID is an acronym for redundant array of independent disks. RAID is a group of disk drives that the host system sees as a single large device. The purpose of RAID is to set up fault-tolerant and fast disk arrays. RAID technology is based on the theory that a group of smaller drives is more efficient than one large drive. The basic premise of fault-tolerant RAID is that an intelligent drive controller, or manager, can handle a drive array so that it can withstand the failure of any individual drive in the array without losing data. RAID storage offers major benefits over nonarrayed storage systems, including the following:
7.2.1 JBODJust a bunch of disks (JBOD) is a storage option that connects one or more standalone disk drives to the RAID controller or other drive controller of a server. This option increases capacity and is used for noncritical business data. The JBOD drive does not become part of a RAID array, but it is made available to the server on the same interconnect bus as the other devices controlled by the RAID controller. The JBOD disk drive has no data redundancy or striping. |
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