On 2014-12-17 9:36 PM, NeilBrown wrote:
Curious. What does "mdadm --examine" report for each device immediately after boot, before you try assembling anything? Maybe also get the output just before you shut down to compare. NeilBrown
Sadly, I had to disassemble this array and get something workable that didn't become unassembled on every restart. I did try sticking all drives on the same AHCI controller, which caused the array to be resynced on every restart instead of disassembled.
I suspect this issue is caused by bcache (I'm using the md as a backing device for bcache.) The bcache maintainer states "get the md people or someone to explain _what_ they want whatever has their device open to do on reboot."
I'm going to setup a test environment and see if I can reproduce it again. -Peter
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