PCIE M.2 drive not mounting after Sonoma install

I just updated to Sonoma 14.1.2 and now my Sonnet M.2 card is only intermittently mounting the Raid drive. Does not show up in SoftRaid, but I can see the PCIE card in my System Report. The only time I can get it to mount is when I physically reseat the card. The Raid shows its intact when it mounts, no errors. Any time I restart or shutdown, the drive dismounts.

This is my daily driver workstation, and used everyday. There were no issues prior to the OS update.

iMac Pro (2017)

Posted on Dec 11, 2023 5:13 PM

Best reply

Element-115

Level 1

10 points

Posted on Jan 14, 2024 8:30 PM

As a test I 'downgraded' from Sonoma to Ventura, using Migration Assistant to restore all apps and files exactly the same as before, with exactly same hardware configuration, and now all M.2 NVME drives installed on both Sonnet 4x4 PCIe cards mount perfectly on my Mac Pro 2019, everytime.

Apple, what on earth have you done with Sonoma to cause external drive mounting to become a random lottery??

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77 replies

Apr 26, 2024 9:41 AM in response to bernsense

Update: almost everytime I restart, either one of the drives won’t show up, or on lucky days, both show up and everything is working. I wish I could rely on the latter.

Tonse

Level 1

14 points

May 1, 2024 8:41 AM in response to TheDogmaphobic

I dont use SoftRaid either, I only installed it to test the cards. Initialising the nvme's with SoftRaid, prior to building the RAID in DU seems to have given a positive result. For now at least.

PCIE M.2 drive not mounting after Sonoma install