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.
Advantages
- Low cost
- No network bottlenecks
- Very simple to implement
- No network hardware needed
- Easy expansion with JBOD
Disadvantages
- 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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