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WD Black WD4001FAEX (2012) VS WD4005FZBX (2018) - effect of the noise each 5 seconds

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WD reply to my request by that :

This being said, as mentioned the noise you hear every 5 seconds is by design to prevent media lube build up due to prolonged dwelling at a single location.

Please keep in mind that the noise heard should not affect the performance that we have listed in our specification sheet for this model drive. I understand this is your first drive where you have noticed this, but again I can assure you based on the information provided, this appears to be operation as designed.

Performance impact during sequential write (whole disk) and random read access (launched on both drive at the same time)
Write speed : WD4001 141Mo/s – WD4005 179Mo/s
Latency (random read) : WD4001 max 2sec – WD4005 max 6.11sec (x3 !)
Request completed (random read) : WD4001 101replies – WD4005 65replies (35% slower !)

WD4005FZBX is a lot more noisy during same operations than the older WD4001FAEX due to the "media lube" always active even during random access

I launch the same test on a WD Red 5400rpm and same result than the WD Black 2012 with constant result one faster access for one slower but always faster than the 6sec of the new WD Black.

Good luck with these "new" drive.



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