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brothertruffle880🇺🇸

SAN vs. NAS - Block I/O versus File I/O
I checked out several links regarding the difference between a SAN and a NAS and I'm not understanding HOW block I/O is different than file I/O?
I also don't understand why block I/O is better than file I/O?

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Avatar of Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)Andrew Hancock (VMware vExpert PRO / EE Fellow/British Beekeeper)🇬🇧

NAS do File I/O, e.g. the file is access through a remote file system, as a file reference. The file is read as a complete file. The file system will ask for the file, and a number of bytes will be read for the complete file.

SAN do Block I/O - when a request comes for a file, it's turned into a request to read several blocks which make up the file.
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Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. In addition to local storage devices like CD and DVD readers, hard drives and flash drives, solid state drives can hold enormous amounts of data in a very small device. Cloud services and other new forms of remote storage also add to the capacity of devices and their ability to access more data without building additional data storage into a device.