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SOLVED 8TB Western Digital WD80EZAZ HDD – Some disks not showing up at all, although working on perfectly in external USB case

Joined
Jan 2, 2015
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#1
My FreeNAS setup looks as follows:
My pool is RAID-Z2, until recently using 6 pcs. Western Digital Blue 5 TB (WD50EZRZ). I'm fully aware that these are cheap desktop drives, but my FreeNAS is only up occasionally for a few hours for backup and Plex Media Server purposes. It's not running 24/7/365, and so far I never had issues with desktop drives in my use case, not these ones, not the smaller ones before.

I'm now in the process of upgrading to 6 pcs. Western Digital 8TB WD80EZAZ (those aren't available under that model number individually, but have been stripped from WD MyBook USB 3.0 external HDD enclosures. With what comes next, it should be noted that the HDDs are connected directly to the 6 SATA3 sockets on this ASRock E3C226D2I motherboard. So no PCIE-SAS board (like IBM 1015M, Dell H200 etc.) involved.

Now comes the interesting part, which makes me scratch my head:

I bought 7 pcs. of those drives (one for spare), and from those 5 were recognized instantly and resilvered flawlessly. 2 units however don't show up at all, ALTHOUGH they work flawlessly on any external USB-SATA bridge. I've tried them on various SATA ports/cables in my installation ... nothing (all ports and cables are known to be good).

Neither one of these 2 disks show up in FreeNAS / Storage / Disks (should be ada5 in the below screenshot), nor in the BIOS (SATA 5 says „Not detected“). But again: These 2 drives aren't dead – they work flawlessly and perfectly fine when attached to a USB-SATA bridge.

Can you tell me what’s going on here!?

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Last edited:

HoneyBadger

Mushroom! Mushroom!
Joined
Feb 6, 2014
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#4
Why, Western Digital, why? Totally unnecessary waste of time.
Well, technically no, a very useful thing for certain operations when you need the ability to be able to simulate a full power cut to the drive without being physically present.

Unnecessary? No. Huge pain in the ass for legacy PSUs and backplanes that bridge SATA power pins 1-3 together? Definitely.
 
Joined
Jan 2, 2015
Messages
55
Thanks
6
#5
Used several layers of Superglue by the way to cover that pin 3, as I had no Kapton tape at hand. Tried nail polish first, but that was too soft.
 
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