Yikes! my x9 just got delivered today, original price.
Question, how do these serial numbers work? its alpha numeric, all I received are Y6GGxxxD
The "oldest" of the bunch was made Tuesday 8th June 2021, SN: Y6GGSK0D, the remaining 8 were made 2 days later Thursday June 10th,
Assuming its like hex we use numbers first then letters?
I immediately run into a problem, the next lowest is Y6GGNZRD
how can N be made after S?
Lots of reasons. That's just a 2 day difference. Parts availability. Location (different factory). etc.
I feel like a need to mail order a decoder ring.
Pretty much, yes. There are actually a few decoders out there, but they're only relevant for disk models sold during certain periods of time.
Western Digital has to be the absolute biggest PITA to decipher their product numbers. They've changed their nomenclature several times, so it takes some detective work (and frequently, an abundance of patience or deciding you don't really care that much).
0F31021 is a WD model number.
Several resellers indicate this is a WUH721414AL4204 drive, but take that with a grain of salt as some resellers don't know what they are doing and/or take a guess.
WD generally does not post those type of model numbers in their documentation anymore. Since they "improved" (/sarc) their website a few years ago, it's extremely difficult to trace a lot of these old product IDs/SKUs through official channels. This is one reason why I consider their product identification system to be byzantine. This gen of WD drives has numerous identifying schemas that WD created at various points in time, such as: Product ID, SKU, WD Model Number, HGST Model Number (the technology behind this drive originated with Hitachi). It's almost as if you'd think WD purposefully changes up their model numbering periodically in order to confuse people. It's like a shell game with many of their drives. Same device. Different ID or different name, etc.
The WD model number you referenced is a classic example of WD's data scrubbing. I was able to find only one official reference
here, though it's barely mentioned.
Once upon a time, it was not too difficult to find the Regulatory Numbers, and that used to be one of the
de facto best methods IMHO of confirming certain details about a drive. However, now due to IP theft and forging of those certs, most of the HDD manufacturers have removed them from publicly accessible servers.
Incidentally, WWN = "World Wide Name" which is just a fancy way of saying "unique identifier."
From one of their tech docs: "
World Wide Name (WWN) — The World Wide Name (WWN) defined in ATA/ ATAPI-7 is a modification of the IEEE extended unique identifier 64 bit standard (EUI-64) and is comprised of three major components: naming authority, organizationally unique identifier (OUI) and serial number. Western Digital’s OUI is 0014EEh."