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My NVMe drives installed in a PCie card on my 2019 Mac Pro stopped mounting when I upgraded to Sonoma.
Is there any future fix to this? I took the drives out and re-seated them in the PCie card and they worked fine for a week, but now they no longer mount again.
Mac Pro (2019)
This has been an issue with some internal PCIe SSD adapter cards since the launch of Sonoma and IIRC, there has been no fix yet. You can look through the following very long thread to see there was any updates or solutions I may have missed. I believe Sonnet and/or OWC support had posted some information in that thread.
PCIE M.2 drive not mounting after Sonoma … - Apple Community
Here is another thread regarding boot issues:
Mac Pro 2023 will not boot with PCIe SSD … - Apple Community
There may have been a few other smaller threads as well.
What format?? APFS for SSD or MacOS Extended (GUID) for HDD should work. Format exFAT in the Mac because it might not like some details if formatted in Windows. NTFS is read-only by default and 3rd party apps enabling write might need updating.
Hi Matti, tried all Mac formats. The drives would show up fine for a couple of days and then disappear for no reason. When I re-seated the drives and changed them to APFS they booted for a week straight. Got up Monday morning, started my MacPro, and no drives. They have not booted since. And it's all four drives that disappear.
Weird. FWIW I still use external HDD/SSD SATA drives via USB3 enclosures with up to 530-560 MB/s, and have considered moving to somewhat faster NVMe drives via M.2 or U.2 but have postponed it because some of the new devices might still be flaky.
These are NVMe drives installed in a Sonnet M2 4x4 SSD PCie card. These drives worked great until I installed Sonoma OS.
I do have SSD Drivebays with External SSD drives that are working just fine. I am a composer and these drives house my sound libraries. Apparently, I am not the only one having this issue. I reached out to the Sonnet folks and they are aware of the issue.
Just wondering if anyone has solved this. I am losing 16 TB of fast drive space for storage and sound libraries.
Oh! And here is the best part. All four drives showed up this morning when I started the computer. Double checked and they are all APFS format. WHAT IS GOING ON???
NVMe Drives won't mount in Sonoma
