There could be other reasons for the errors besides secondary memory failure, but there are good discussions elsewhere on this forum about ROCK SSD issues, including some with Transcend memory sticks, so your best bet is to look at those, for instance Transcend 256GB SSD failed? [resolved]. I don’t run ROCK myself, but rather other Linux-based server setups, so I don’t have specific instructions on how to confirm the problem. You could of course get another SSD stick, install ROCK, and restore your Roon database from backup as if you were migrating to a new ROCK: https://help.roonlabs.com/portal/en/kb/articles/migrating-to-rock.
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