Does Ethernet track requests sent to the server?

I have read that the Ethernet network on which NAS is based does not track the request sent to the server and acknowledge that it was received. In the case of the SAN, the writing guarantee is given by the switch. Is that right? Why and how?

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Each solution uses its native protocol for I/O. NAS uses Ethernet, and SAN uses SCSI over Fibre Channel. The end nodes are responsible for tracking the receipt of frames or blocks. Taking SAN as an example, using an enterprise class storage array, each I/O from the host is acknowledged as received in the array as soon as it hits the cache of the storage array.

File access over IP uses standard Ethernet handshaking.

Read Randy Kerns' answer to this question.

This was first published in November 2004

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