I removed two partitionless Btrfs formatted drives from an Arch Linux based PC and installed them in another Linux based PC also running Arch. The drives are independent of one another, each containing its own Btrfs filesystem. Both machines are running recent kernels and the original host would be running whatever kernel was current in Arch on 1 Jan 2018. lsblk shows the two drives as partitionless as I'd expect, but attempting to mount them returns an error saying they're not recognised and btrfs filesystem show /dev/sdX also returns that the devices do not contain a Brtfs partition. 1 Jan 2018 was the last time I accessed these drives, which were mounted via the first machine's fstab. blkid returns PTTYPE="PMBR" for both. For the current machine: uname -a returns: Linux ryzen 4.14.13-1-ARCH #1 SMP PREEMPT Wed Jan 10 11:14:50 UTC 2018 x86_64 GNU/Linux btrfs --version returns: btrfs-progs v4.14 Any ideas what could have gone wrong here? I'm hoping that reinserting them in the original machine may allow me to access the underlying data again, but that machine is in another country at present. Any help much appreciated. Thanks Evan -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
