Hi, On Sat, Sep 12, 2026 at 10:34:20AM -0400, Gary Dale wrote: > # mdadm --manage /dev/md0 --add /dev/sde1 --force > mdadm: add new device failed for /dev/sde1 as 7: Invalid argument > mdadm: Cannot read superblock on /dev/sde1 > # mdadm --zero-superblock /dev/sde1 > mdadm: Unrecognised md component device - /dev/sde1 > # mdadm --manage /dev/md0 --re-add /dev/sde1 > mdadm: --re-add for /dev/sde1 to /dev/md0 is not possible
What does: # wipefs -an /dev/sde1 say? (The -n is for "no action"l it won't actually wipe anything.) If there's something unexpected on there, and nothing that needs keeping, repeating without the -n will erase it and then maybe mdadm will be happy. Also, are there any logs about what the kernel objects to with regard to sde1? Thanks, Andy -- https://bitfolk.com/ -- No-nonsense VPS hosting
