WWN (World Wide Name)
A World Wide Name (WWN) or World Wide Identifier (WWID) is a unique identifier used in storage technologies including Fibre Channel, Advanced Technology Attachment (ATA) or Serial Attached SCSI (SAS).
WWN is a unique identifier that is assigned to a manufacturer by the Institute of Electrical and Electronic Engineers (IEEE) and hard-coded into a Fibre Channel (FC) device.
The names are usually 128 binary digits (bits) long but could be 64 bits if the device is older.
A WWN is similar in concept to a network card's media access control (MAC) address in an Internet protocol (IP) network but is formatted differently.
A bit more explanation needed…one example of usage should be good.
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