I have a 14 drive RAID5 array with 1 spare. Each drive is a 2TB SSD. One of the drives failed. I replaced it, and while it was rebuilding, one of the original drives experienced some read errors and seems to have been marked bad. I have since cloned that drive (first using dd and the nddrescue), and it clones without any read errors. I think the read errors were coming from a faulty SATA cable. But now when I run the 'mdadm --assemble --scan' command, I get: mdadm: failed to add /dev/sdi to /dev/md/0: Invalid argument mdadm: /dev/md/0 assembled from 12 drives and 1 spare - not enough to start the array while not clean - consider --force mdadm: No arrays foudn in config file or automatically The sdi drive is the cloned drive. My googling for the "Invalid argument" error have come up dry. Both the original and the cloned drive give the same error. If I try the --force, I get the same Invalid argument error but also a 'not enough operational devices (2/14 failed). Any suggestions on how to recover from this situation? Lane
