It looks like there may be more of a performance issue with disk storage than the Samsung 970. I am a heavy user of Adobe Lightroom Classic. I have not had a problem with it all through the Monterey betas until 12.01. Suddenly, using Lightroom would slow all disk access and bring the operating system to a slow crawl. I uninstalled Lightroom and reinstalled it and built a new catalog. On trying to import the photos (2.5 GB) the import brought the system to a slow crawl. I tested all my disks and even the Sabrent NVME PCIE 4.0 was running at about 500 MB/s. Forced quit Lightroom and everything returned to normal. My photography disk is an external OWC TB3 enclosure in RAID 5 configuration using Softraid 6.2 which is compatible with Monterey. That disk is backed up to an 8 TB hard drive in another external TB2 enclosure connected with Apple TB3 to TB2 adapter. I decided to target the backup drive by building a new catalog from the backup. The problem is gone. This, of course, begs several questions.
- Is a software RAID configuration incompatible with Monterey 12.01 or OC 0.75? (There are no issues listed with Monterey 12.01 and SOFTRAID that I could find on-line.)
- Is the OWC RAID enclosure incompatible with Monterey 12.01 or OC 0.75?
- Is there a problem with OC 0.75. I am not sure whether Monterey 12.01 is the culprit or OC 0.75 is since I first noticed the problem when my system was running both.
- Is there a problem with the latest version of Adobe Lightroom Classic? (No issues come up with Lightroom Classic and Monterey from my online research.)
- If I boot into my BIG SUR drive there are no problems.
- Is there an unknown issue between Monterey 12.01 and OC 0.75?
I will continue to research the issue and will post if I find anything. If any of you have these issues, have you come up with a solution?