Q:- What is Direct-attached storage (DAS)?
Direct-attached storage (DAS) refers to a digital storage system directly attached to a server or workstation, without a storage network in between. It is a retronym, mainly used to differentiate non-networked storage from the concepts of storage area network (SAN) and network-attached storage (NAS).
Q:- What are disadvantages of DAS?
DAS has been referred to as “Islands of Information”.The disadvantages of DAS include its inability to independently share data or unused resources with other servers. Both NAS (network-attached storage) and SAN (storage area network) architectures attempt to address this, but introduce some new issues as well, such as higher initial cost, manageability, security, and contention for resources.
Q:- Explain DAS devices?
DAS can refer to a single drive or a group of drives that are connected together, as in a RAID array. In addition, DAS devices can be housed inside a PC or server (as is the case with internal hard drives) or outside the PC or server (as is the case with external hard drives and storage appliances). Multiple systems can use the same DAS device, as long as each PC or server has a separate connection to the storage device.
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