I wrote about errors on my RAID-1 array: >> $ cat myfile >> cat: myfile: Input/output error >> >>...how to figure out which (if any) of the two SSDs is faulty?
On October 13, 2025, Rich Pieri wrote: >Break the mirror and see which one still faults. I tried to do this, and weirdly, both drives still faulted on the same file. Here's what I did: 1. Boot on a rescue CD. (Since the array is my root partition.) 2. Create a RAID-1 array containing just one of the SSDs: $ sudo mdadm --assemble --readonly /dev/md0 /dev/nvme0n1p1 --run 3. Mount the array and try the same "cat" command. It produces an input/output error as before. 4. Stop the array: $ sudo mdadm --stop /dev/md0 5. Repeat the process for the other SSD, /dev/nvme1n1p1. Same result! When *both* drives from an array produce the same disk error independently, where does the actual problem lies? Or did I do something wrong? Thank you again, Dan _______________________________________________ Discuss mailing list [email protected] https://lists.blu.org/mailman/listinfo/discuss
