Difference between WD4000FYYZ-01UL1B1 and 01UL1B2?


whats the difference between the two Models: WD4000FYYZ-01UL1B1 and WD4000FYYZ-01UL1B2? I’ve got already three of the “01UL1B1-Models” and want to buy antoher one, which has got another ending (01UL1B2).

Just wondering if anything has technically changed, because I want to use the same drives in a RAID-Array.



Welcome to the Community.

WD constantly updates drive revisions as soon as manufacturing or firmware improvements are deployed. However, revision details are not available to the public.

Maybe you should try contacting WD’s Technical Support about this. You can do so either by phone or email.

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