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Direct attached storage (DAS) is directly attached to the computer accessing that storage, unlike other types of storage where the storage is accessed over a network. Examples of DAS include: hard drives, optical storage, solid state drives (SSD), storage on external drives, and RAID arrays located physically in the computer. DAS has a 1:1 relationship between storage and host whereas SDS, DFS, SAN and NAS are many-to-many.


  • Low cost
  • No network bottlenecks
  • Very simple to implement
  • No network hardware needed
  • Easy expansion with JBOD


  • Limited to 1:1 storage-to-host ratio
  • Limited scalability

Best Uses

  • HPC storage right in cluster head node
  • General file server storage r
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Nor-Tech is an Intel HPC Specialist