- NAS -- SATA drives over Ethernet
- NAS -- FC drives over Ethernet
- SAN -- FC drives over fibre
- SAN -- FC drives over Ethernet
FC drives are faster than SATA drives (at least all the current generations that I've seen) for a couple of reasons....
By submitting your personal information, you agree that TechTarget and its partners may contact you regarding relevant content, products and special offers.
The first is that the cost savings for ATA is accomplished primarily by having a single processor to handle command and servo positioning. In FC there are two separate processors. This allows the FC drives to usually spin faster and handle servo problems induced by vibration or wear without sacrificing performance (ATA will use more of the processor power for servo control in that case rather than handling data transfer). FC is a more hardware intensive interface and is more costly, but also provides more performance.
NAS is remote file serving so there are more elements in the data path than a SAN, which effectively gives you direct block I/O. Implemented correctly, a SAN should always be faster to transfer data than a NAS implementation. The question always is: What are your requirements? NAS may fit your requirements effectively.
Dig Deeper on Primary storage capacity optimization
Related Q&A from Randy Kerns
What is the one hidden gotcha that you'd advise users about if they were shopping for an all-flash storage array?continue reading
How much control do you have with all-flash storage arrays? How much control do you have over how arrays handle your data? Do you control the caching?continue reading
Vendors often publish numbers for 'usable' capacity versus 'effective' capacity. Can you explain this and how can you plan flash capacity needs with ...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.