I have a Linux based NAS with a single partition used for immediate disk based backups prior to moving to other media.
The partition was about 98% full when it went south. I was able to login to the NAS and effect a file system repair after umount using "xfs_repair -L <device>". I was unable to fsck the partition.
I still cannot fsck the partition as it cannot find the superblock. I have tried most of the alternate superblock as reported by "mke2fs -n <device>" with the same results.
I can mount the partition and use it, the mount comes back following reboots, I just cannot umount and fsck the partition.
How can I repair this partition so that the fsck functions?