I had to manually type the code above and put up the general gist without going into the numerical output wihtin that range, but can refactor if needed for troubleshooting. Allow partial last cylinder : No Ask partition order : No Halt on errors : Yes Expert mode. The block number range is from 244889344 to 244889351 for the async page read errors Mount: /dev/mapper/luksRecover: can't read superblock Analyse on TestDisk says: Disk /dev/disk1 1000 GB / 9525168 sectors. FAT-fs (dm-0): unable to read boot sector blk_update_request: I/O error, dev loop1, sector 4096 blk_update_request: I/O error, dev loop1, sector 240793344 Buffer I/O error on dev sdb4, logical block 244889344, async page read Examine your current partition structure for missing partitions and errors. Now, your current partition structure is listed. Confirm at Analyse with Enter to proceed. some partitions are not found by TestDisk - or the partition table can not be written because partitions overlaps. Just to add that although possible you do not need Testdisk to make a new boot sector to recover your 20GB of data. Use the default menu 'Analyse' to check your current partition structure and search for lost partitions. Rebooting allowed me to run losetup with no issues. TestDisk displays the menus (also see TestDisk Menu Items ).
TESTDISK ANALYSE CYLINDER READ ERROR INSTALL
I haven't been able to find documentation on loop devices the way I found documentation on installing archlinux on the wiki.ĮDIT: I found that the reason why losetup wasn't working was because on my working install of archlinux, I had updated the kernel and hadn't rebooted. I've been referencing this thread as well: and it mentions using a loop device but I wasn't able to find documentation that takes me step by step through the process, but then now I'm finding that one of the steps it advises is to use losetup, which I can't use since I get losetup: cannot find an unused loop device. Select the hard disk on which is the RAW partition, then press Enter. Unfortunately, I don't know where to go from here and would appreciate any help in recovering this data. To begin, select 'Create' (option selected by default) and press Enter. So, thankfully (or at least, hopefully), testdisk didn't overwrite my LUKS header and simply did some funky partition shifting.
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