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In order to replicate the issue just connect any external SSD wait for a while and it will be disconnected with message "Disk Not Ejected Properly". SSD is connected to M1 MacBook Pro. It's neither a cable issue because I tried multiple cables, nor an SSD issue as everything worked just fine before upgrade.
I have the same happening, Sonoma 14.2 but with my external HDD. I used a WD mobile drive 5TB for years and it recently disconnected more and more often, until in the end it could not even be mounted anymore. Disk utility could not fix it. I thought the drive is the problem and got a new one, now a LaCie 5TB.
But the same thing happens. It keeps disconnecting once or twice a day, even when in the middle of a backup process.
This is a major bug.
Also having the same issue! Noticed it on both my 2023 Mac mini with a 3 disk traditional spinning hard drive configured as RAID 0 (using disk utility), and on my 2021 MacBook Pro with a Crucial X6 SSD.
I have the same issue with a Samsung T7 1TB drive. I have noticed a pattern. I have three portable usb drives(2 SSD and one Lacie rugged).
All drives except the Samsung T7 work perfectly on all my Macs (+ others where I work).
The T7 works on all macs that have earlier operating systems (not Ventura or Sonoma). On operating systems from Mavericks to Monterey The T7 works fine and in the system report in the Hardware: USB tab, current available is 900mA and current required is 896mA. But on either Ventura or Sonoma, current available is 500mA and current required is 500mA. The other drives (WD passport 1TB and Lacie Rugged 2TB) show current available is 900mA and current required is 896mA across all hardware and operating systems.
The T7 will mount but after a short period will become unresponsive and be difficult to eject. When I first noticed this the drive would eject itself but it no longer does this. It just becomes unresponsive. I have seen it happen on four different machines, two with Ventura and two with Sonoma. I hope Apple will take this issue seriously.
Perhaps this is difficult to follow so I will summarise:
WD passport and Lacie Rugged work on Macbook Pro M2 13.6.7, IMac M1 14.4.1, IMac M1 13.6.6
Samsung T7 does not work on Macbook Pro M2 13.6.7, IMac M1 14.4.1, IMac M1 13.6.6 but works perfectly on a variety of hardware up to Monterey.
When T7 has problems current available is 500mA and current required is 500mA and this only happens with Ventura and Sonoma
I suggest you run first aid on the drive. If that fails to fix the problem, erase and reformat the drive.
Useless for now what I suspect is a failed disk.
I suggest you cut to the chase and replace the disk.
OK
Latest update not fix this issue still disconnect m2 drives
Just started happening for me, too. Have not had any luck getting it to work; going to try formatting the drive I guess and see if that fixes it.
Same here on Mac Mini. Tested with TB ports so far. Freshly formated NVME. I hope it will be fixed soon. Installing/downloading large libraries is barely possible now
Formatting my drive and starting over from scratch appears to have fixed the problem.
Is it possibly Apple is writing code to steer customers from buying cheaper storage and avoiding the expensive options Apple offers, (most especially with the 2023 Apple M-2 MacMini?$$$) IMHO
Has anyone ever tried to disable "Put hard disks to sleep when possible" and check, if that helps? Searched the thread, but I didn't find anything.
External SSD keeps disconnecting after upgrading to Sonoma
