Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

bollman

macrumors 6502a
Original poster
Sep 25, 2001
819
1,859
Lund, Sweden
So, I noticed this yesterday when I lost 240GBs of data :(
An external M2 enclosure with a JMicron JMS583 controller is _not_ considered "Solid State" by Ventura, but on all older versions of macOS.
This means, as soon as the disk has been connected to a mac running Ventura, the filesystem is botched, if formatted to APFS.
It will probably read once on Ventura, but ejecting and inserting gives a more or less blank disk and Disk Utility will just say it is beyond repair.
Formatting it on Ventura and only running it on Ventura works fine, and also using it only on older macOS works fine.
There is something in APFS that differs between disks makred as "Solid State" or not. So, APFS behaves differently and therefore mangles the filesystem.
I tried updating the firmware of the controller, but it made no difference.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.