[Discuss] Help with I/O errors on RAID array?

[dbarrett at blazemonger.com (Daniel Barrett)]

On October 13, 2025, markw at mohawksoft.com wrote:
>Try journalctl | grep -i err
>It should spew a lot.

Thanks! Among the 3930 lines of output, I did find one relevant error:

  kernel: Buffer I/O error on dev md1p1, logical block 4199909, async page 
read

It's from a week ago and appears twice (well, two sets of 4 identical
messages). Does this point to a culprit?

Also FYI, I ran the SMART long test on both SSDs:

  $ sudo nvme device-self-test /dev/nvme0 -n 1 -s 2
  $ sudo nvme device-self-test /dev/nvme1 -n 1 -s 2

I believe they both passed (based on "Operation Result" = 0):

  $ sudo nvme self-test-log /dev/nvme0n1
  Device Self Test Log for NVME device:nvme0n1
  [...]
  Self Test Result[1]:
    Operation Result             : 0
    Self Test Code               : 1
    Valid Diagnostic Information : 0
    Power on hours (POH)         : 0x1c99
    Vendor Specific              : 0 0

  $ sudo nvme self-test-log /dev/nvme1n1
  Device Self Test Log for NVME device:nvme1n1
  [...]
  Self Test Result[1]:
    Operation Result             : 0
    Self Test Code               : 1
    Valid Diagnostic Information : 0
    Power on hours (POH)         : 0x1bf6
    Vendor Specific              : 0 0

Dan