Crucial NVMe Drive Issues with Mac Pro 7,1
Hi everyone,
I'm an OCLP 5,1'r on my 1st 7,1 odyssey. And I'm unsure how to proceed.
Sorry for the length.
I’ve been going through multiple pages on these issues, and it seems most people are able to get their drives to mount with repeated restarts, zapping PRAM, re-seating cards, and the latest Sequoia, but I’ve come across a potential compatibility issue with my Crucial NVMe drives and my 16-core Mac Pro. I’m looking for some advice.
Background:
I recently upgraded from a 5,1 Mac Pro to a used Mac Pro 7,1 (16-core, 192GB RAM, 2TB system drive) purchased from iPowerResale, who are selling "off-lease Meta.com" machines. It’s now running Ventura 13.7.4, and I’ve been using it for orchestral composing.
Audio Setup:
- Avid HD|Native card in slot #2 with an OMNI, which is working fine.
- Added a Sonnet Fusion Flex J3i with a Seagate 16TB drive and a WD 1TB SSD for now.
NVMe Drives:
- 4TB WD Blue and newer Crucial P3 4TB (REV D) on an OWC 4M2 card.
- Older Crucial P3 4TB (REV A, fresh from packaging) on an OWC 1M2 card.
I’m not running RAID, just individual drives. I’ve been reinstalling my audio software from scratch, and everything was running fairly smoothly (barring some 'hard crash' kernel panics which I attributed to the continuing software installs) until yesterday when I was experiencing repeating kernel panics repeatedly. I upgraded Ventura from 13.7.2 to 13.7.4 in hopes of a fix. Then I noticed the REV A Crucial drive had stopped mounting?
Current Problem:
- The REV A Crucial P3 4TB on the OWC 1M2 card (in Slot #7) is not mounting but is seen in Disk Utility — it’s greyed out and won’t mount with "the Disk Utility button". The drive contains 3.3TB of orchestral libraries, and I need to access the folder index.
- I had planned to back it up to the 16TB Seagate soon, but now I’m unable to do so.
Troubleshooting Steps Taken:
- Unplugged and reset the Mac Pro
- Reset PRAM (caught only 2 ‘chimes’)
- Multiple reboots (cold, restarts, etc.)
- Booted in verbose mode
- Booted in Safe Mode (Shift key held down)
- Ran Apple’s First Aid, which reported:
- Bad checksums and missing resource forks.
- Corrupted, requires repair.
- Unable to verify the container completely
- Error code: -69716.
- Unfortunately, I read that First Aid destroys recover-ability?
What I’ve Learned:
- Expansion Slot Utility in Ventura is located in the Library, not in System Report.
- Crucial NVMe drives appear to have compatibility issues with the 16-core Mac Pro 7,1
(as confirmed by Crucial's own website, linked earlier in this thread).
- Other users have reported kernel panics with Crucial drives installed (same for me).
- There may be a security or permission issue causing the mount failure.
Positives:
- Kernel panics have stopped since the REV A Crucial drive stopped mounting.
- No critical work has been lost — only time spent installing and configuring software.
Negatives:
- $450 spent on two unusable Crucial 4TB drives
- Unable to verify which orchestral sample libraries are now inaccessible?
- I'm hesitant about fully trusting the 7,1 Mac Pro after my experience (I still love my 5,1).
- I hoped leaving the 5,1 for the 7,1 would be a seamless upgrade, but it's been a rocky transition.
Questions:
- Should I initiate an RMA for the REV A Crucial drive?
- Could the REV A Crucial drive potentially work in an external case?
- Is there a firmware upgrade available for the REV A model?
- Given that PCIe slots 4, 5, and 6 are open, should I try moving the drive from Slot #7?
AppleCare?
- The machine has AppleCare through March 18th, 2025. Should I open a ticket ASAP?
I’d greatly appreciate any insights or suggestions. I know many of you folks have battled these issues.
Thanks in advance for any insights and advice.
I truly appreciate it.
Kindest regards

wfm