I've tested this with 4.15, 5.0, 5.3 and 5.4 kernels on bionic, eoan and focal and I'm getting the same results, always a failure. I've not got it to work at all on 4.15.0 so far. I'm not sure why this is.
Can you run this on a 4.15 based system and gather the output from bash -x ./test-bcache-byuuid-links.sh and provide:
1. the output of a bash -x run that works
2. the kernel version and release info
I've tested this with 4.15, 5.0, 5.3 and 5.4 kernels on bionic, eoan and focal and I'm getting the same results, always a failure. I've not got it to work at all on 4.15.0 so far. I'm not sure why this is.
Can you run this on a 4.15 based system and gather the output from bash -x ./test- bcache- byuuid- links.sh and provide:
1. the output of a bash -x run that works
2. the kernel version and release info
Then I'll have a go at reproducing it again.