• mdadm: add new device failed for /dev/sdb4 as 3: Invalid argument solution


    mdadm --manage /dev/md125 -a /dev/sdb4 mdadm: add new device failed for /dev/sdb4 as 3: Invalid argument Dec 19 01:23:48 storageboxtest kernel: [ 2328.854491] md: sdb4 does not have a valid v1.2 superblock, not importing! Dec 19 01:23:48 storageboxtest kernel: [ 2328.854499] md: md_import_device returned -22 #zero the superblock and try again! mdadm --zero-superblock /dev/sdb4 mdadm --ma........
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