Andy Smith <andy@xxxxxxxxxxxxxx> writes: > Created a new partition 1 of type 'Linux' and of size 127 MiB. > Partition #1 contains a ext4 signature. > > Do you want to remove the signature? [Y]es/[N]o: n fdisk sees the filesystem. So far, everything looks perfect. > Failed to remove partition 1 from system: No such device or address > Failed to add partition 1 to system: Invalid argument This is just because device-mapper doesn't support partitions, so fdisk couldn't get the kernel to re-read the partition table. > dsthost$ sudo mount /dev/mapper/slowvg-4ksectortest1 /mnt > mount: /mnt: wrong fs type, bad option, bad superblock on /dev/mapper/slowvg-4ksectortest1, missing codepage or helper program, or other error. > > So at the end here, despite msdos partition table looking correct, > sha256sum matching and kpartx appearing to work, dsthost can't mount > this filesystem. Did I miss a step or misunderstand? Try mount -t ext4. If that doesn't work, see what e2fsck/tune2fs say.
