Hello, I have a question about veritysetup using forward error correction. I created my dm-verity volume using veritysetup --check-at-most-once --fec-device /dev/vdc --fec-roots 24 format /dev/vdb1 /dev/vdd Then I introduce a single bit error into /dev/vdb1. If I then open the dm-verity device using veritysetup --fec-device /dev/vdc --fec-roots 24 open /dev/vdb1 vroot /dev/vdd <hash> When I mount the device and inspect the corrupted file, the single bit error cannot be corrected: [ 108.994804] device-mapper: verity-fec: 254:17: FEC 19300352: failed to correct: -74 [ 108.994834] device-mapper: verity: 254:17: data block 273411 is corrupted However, if I verify the whole device using veritysetup it succeeds: veritysetup --fec-device /dev/vdc --fec-roots 24 verify /dev/vdb1 /dev/vdd <hash> Verification failed at position 1119891456. Verification of data area failed. Found 1 repairable errors with FEC device So I suspect that I have the wrong flags to veritysetup open. Can anybody see where I am going wrong? Thanks, Tom _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx https://www.saout.de/mailman/listinfo/dm-crypt
