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JoSch

macrumors 6502
Original poster
Feb 22, 2013
331
105
Hi.

My setup is a iMac 21,5 2017 with a 1TB HDD with Mojave with all updates applied. For the time being, I cloned the internal HDD to a SSD in a Echo 15+ Thunderbolt enclosure. In this enclosure I have two additional HDDs for project stuff.
Until yesterday everything worked just fine. Yesterday, the iMac just ejects the project HDD on login if I boot from the external SSD. If I boot the SSD volume in safe mode or boot from the internal HDD, the volumes don't get ejected.
I looked into system log, when trying to re-activate these volumes. There it states that the volumes are not readable. At the same time, apfs_fsck checks the volumes just fine.
I connected the enclosure to my Macbook Pro 2015 with the same OSX version. No problems here.
Anyone with thoughts, what's going on? Any ideas how to fix that?

EDIT: All volumes are healthy.
 
After cloning from the external SSD to the internal HDD, that system also ejects the project HDDs, so it seems like some system file screw up.
I will try to reinstall Mojave.
 
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