At first I thought it was a defective drive, but now having received a second one and which is now experiencing the exact same issues, I'm beginning to wonder if this is a much wider problem specific to Western Digital 6TB Black drives plugged into the stock SATA ports of a 5,1 (2012 dually).
The drives fail to mount on restarts intermittently.
Otherwise there doesn't appear to be any corruption of data nor any reported hardware failures via SMART. They just don't show up anywhere, either under System Report, Disk Utility, or other drive/storage utility, when they fail to mount.
I have a WD 6TB Red Pro installed as well but no problems whatsoever.
Has anyone else experienced this issue with 6TB Blacks?
My config is the 3 aforementioned WD 6TBs (2x Blacks, 1x Red Pro), 1 Hitachi 4TB (plugged into second optical drive bay SATA port), 1 WD 2TB Green, 2x 850 EVO 2TBs on a Apricorn Velocity Duo x2 PCI-e card.
[doublepost=1505917308][/doublepost]Well, I think I may have found the problem: it's the drive design of at least 6TB Blacks and Golds themselves, and 6TB HGST drives (also a WD company). It's a confluence of variables involving the drives' TLER settings, which are not changeable for these drives, Mac Pros 4,1 and 5,1, and OS X 10.7 and newer:
WD Gold 6TB problems with Mac Pro 5,1
6TB HGST won't mount after restart in Mac Pro 5,1
The gist is, during a restart these drives don't have enough time to sufficiently "spin-up" to ready-status due to their TLER settings, especially when booting off an SSD (which I'm doing), and therefore are not detected by the hardware. Thus, these are not really "compatible" per se in these scenarios, and there is no solution other than avoiding them outright.
The drives fail to mount on restarts intermittently.
Otherwise there doesn't appear to be any corruption of data nor any reported hardware failures via SMART. They just don't show up anywhere, either under System Report, Disk Utility, or other drive/storage utility, when they fail to mount.
I have a WD 6TB Red Pro installed as well but no problems whatsoever.
Has anyone else experienced this issue with 6TB Blacks?
My config is the 3 aforementioned WD 6TBs (2x Blacks, 1x Red Pro), 1 Hitachi 4TB (plugged into second optical drive bay SATA port), 1 WD 2TB Green, 2x 850 EVO 2TBs on a Apricorn Velocity Duo x2 PCI-e card.
[doublepost=1505917308][/doublepost]Well, I think I may have found the problem: it's the drive design of at least 6TB Blacks and Golds themselves, and 6TB HGST drives (also a WD company). It's a confluence of variables involving the drives' TLER settings, which are not changeable for these drives, Mac Pros 4,1 and 5,1, and OS X 10.7 and newer:
WD Gold 6TB problems with Mac Pro 5,1
6TB HGST won't mount after restart in Mac Pro 5,1
The gist is, during a restart these drives don't have enough time to sufficiently "spin-up" to ready-status due to their TLER settings, especially when booting off an SSD (which I'm doing), and therefore are not detected by the hardware. Thus, these are not really "compatible" per se in these scenarios, and there is no solution other than avoiding them outright.
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