Am 06.02.20 um 23:03 schrieb Chris Murphy:
There's not enough information to know what's going on yet. My strong advice is to make no further changes (no writes) to either block device until you understand exactly what's going on. Every write increases the chance of permanently losing the file system.
On Thu, Feb 6, 2020 at 2:01 PM Simeon Felis <arch-general@sfelis.de> wrote:
4.19.75 dmesg:
[ 17.707873] GPT:Primary header thinks Alt. header is not at the end of the di sk. [ 17.707889] GPT:7814037167 != 253879390758629 [ 17.707895] GPT:Alternate GPT header not at the end of the disk. [ 17.707902] GPT:7814037167 != 253879390758629 [ 17.707907] GPT: Use GNU Parted to correct GPT errors. [ 17.707977] sdb: sdb1 [ 17.709682] GPT:Primary header thinks Alt. header is not at the end of the disk. [ 17.709697] GPT:7814037167 != 253879390758629 [ 17.709703] GPT:Alternate GPT header not at the end of the disk. [ 17.709710] GPT:7814037167 != 253879390758629
This is terrible error reporting (by the kernel) in that it's not clearly stating whether the primary GPT is reporting 7814037167 or 253879390758629. No shit, they aren't the same. Usually this error means the backup GPT at the end of the drive has been stepped on by something; but LBA 253879390758629 is plainly bogus, that's ~115PiB.
What do you get for either 'fdisk -l' or 'gdisk -l' or 'parted /dev/sda u s p' for each device?
root@omv:~# fdisk -l /dev/sda Disk /dev/sda: 3.7 TiB, 4000787030016 bytes, 7814037168 sectors Disk model: USB3.0 DISK03 Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disklabel type: gpt Disk identifier: 63E9CA8E-F1B4-8A41-9C21-F058C1AC0783 Device Start End Sectors Size Type /dev/sda1 2048 7814037134 7814035087 3.7T Linux filesystem root@omv:~# fdisk -l /dev/sdb Disk /dev/sdb: 3.7 TiB, 4000787030016 bytes, 7814037168 sectors Disk model: USB3.0 DISK04 Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disklabel type: gpt Disk identifier: 9904ABA2-B9F8-4544-9699-9935CE8A7B1F Device Start End Sectors Size Type /dev/sdb1 2048 7814035455 7814033408 3.7T Linux filesystem root@omv:~# gdisk -l /dev/sda GPT fdisk (gdisk) version 1.0.3 Partition table scan: MBR: protective BSD: not present APM: not present GPT: present Found valid GPT with protective MBR; using GPT. Disk /dev/sda: 7814037168 sectors, 3.6 TiB Model: USB3.0 DISK03 Sector size (logical/physical): 512/4096 bytes Disk identifier (GUID): 63E9CA8E-F1B4-8A41-9C21-F058C1AC0783 Partition table holds up to 128 entries Main partition table begins at sector 2 and ends at sector 33 First usable sector is 2048, last usable sector is 7814037134 Partitions will be aligned on 2048-sector boundaries Total free space is 0 sectors (0 bytes) Number Start (sector) End (sector) Size Code Name 1 2048 7814037134 3.6 TiB 8300 root@omv:~# gdisk -l /dev/sdb GPT fdisk (gdisk) version 1.0.3 Partition table scan: MBR: protective BSD: not present APM: not present GPT: present Found valid GPT with protective MBR; using GPT. Disk /dev/sdb: 7814037168 sectors, 3.6 TiB Model: USB3.0 DISK04 Sector size (logical/physical): 512/4096 bytes Disk identifier (GUID): 9904ABA2-B9F8-4544-9699-9935CE8A7B1F Partition table holds up to 128 entries Main partition table begins at sector 2 and ends at sector 33 First usable sector is 34, last usable sector is 7814037134 Partitions will be aligned on 2048-sector boundaries Total free space is 3693 sectors (1.8 MiB) Number Start (sector) End (sector) Size Code Name 1 2048 7814035455 3.6 TiB 8300