What is the problem you are having with rclone?
There's some sort of buggy interaction happening with B2 + no_data_encryption = true. When writing a file smaller than the chunk size, the upload fails with Failed to copy: Checksum did not match data received (400 bad_request) . When writing a chunked file, the upload succeeds but the read fails with Failed to copy: corrupted on transfer: SHA1 hashes differ
Run the command 'rclone version' and share the full output of the command.
rclone v1.75.0
- os/version: nixos 26.05 (64 bit)
- os/kernel: 6.18.40 (aarch64)
- os/type: linux
- os/arch: arm64 (ARMv8 compatible)
- go/version: go1.26.5
- go/linking: static
- go/tags: none
Which cloud storage system are you using? (eg Google Drive)
Backblaze B2
The command you were trying to run (eg rclone copy /tmp remote:tmp)
rclone copy big.bin crypt:_test/ --b2-chunk-size 5M --b2-upload-cutoff 5M
rclone copy crypt:_test/big.bin ./dl/
The rclone config contents with secrets removed.
[b2]
type = b2
account = XXX
key = XXX
[crypt]
type = crypt
remote = b2:XXX
filename_encryption = standard
directory_name_encryption = true
no_data_encryption = true
password = XXX
password2 = XXX
A log from the command with the -vv flag
$: head -c 5M /dev/urandom > small.bin
$: rclone copy small.bin crypt:_test/ --b2-chunk-size 5M --b2-upload-cutoff 5M -v
2026/08/09 16:21:24 ERROR : small.bin: Failed to copy: Checksum did not match data received (400 bad_request)
2026/08/09 16:21:24 ERROR : Attempt 1/3 failed with 1 errors and: Checksum did not match data received (400 bad_request)
2026/08/09 16:21:24 ERROR : small.bin: Failed to copy: Checksum did not match data received (400 bad_request)
2026/08/09 16:21:24 ERROR : Attempt 2/3 failed with 1 errors and: Checksum did not match data received (400 bad_request)
2026/08/09 16:21:25 ERROR : small.bin: Failed to copy: Checksum did not match data received (400 bad_request)
2026/08/09 16:21:25 ERROR : Attempt 3/3 failed with 1 errors and: Checksum did not match data received (400 bad_request)
2026/08/09 16:21:25 INFO :
Transferred: 15 MiB / 15 MiB, 100%, 0 B/s, ETA -
Errors: 1 (retrying may help)
Elapsed time: 1.8s
2026/08/09 16:21:25 NOTICE: Failed to copy: Checksum did not match data received (400 bad_request)
$: head -c 6M /dev/urandom > big.bin
$: rclone copy big.bin crypt:_test/ --b2-chunk-size 5M --b2-upload-cutoff 5M -v
2026/08/09 16:22:52 INFO : big.bin: Copied (new)
2026/08/09 16:22:52 INFO :
Transferred: 6 MiB / 6 MiB, 100%, 0 B/s, ETA -
Transferred: 1 / 1, 100%
Elapsed time: 0.2s
$: rclone $RC --config $CONF copy crypt:_test/big.bin ./dl/ -v
2026/08/09 16:24:23 ERROR : big.bin: Failed to copy: corrupted on transfer: SHA1 hashes differ want "20686305e2a9c71069d9c49129ad9e5fcdebc7f2" vs got "3a8e804a1c0b9fc43fa2fa02cd269fa22825ffa9"
2026/08/09 16:24:23 INFO : big.bin.c08084f0.partial: Removing failed copy
2026/08/09 16:24:23 ERROR : Attempt 1/3 failed with 1 errors and: corrupted on transfer: SHA1 hashes differ want "20686305e2a9c71069d9c49129ad9e5fcdebc7f2" vs got "3a8e804a1c0b9fc43fa2fa02cd269fa22825ffa9"
2026/08/09 16:24:23 ERROR : big.bin: Failed to copy: corrupted on transfer: SHA1 hashes differ want "20686305e2a9c71069d9c49129ad9e5fcdebc7f2" vs got "3a8e804a1c0b9fc43fa2fa02cd269fa22825ffa9"
2026/08/09 16:24:23 INFO : big.bin.c08084f0.partial: Removing failed copy
2026/08/09 16:24:23 ERROR : Attempt 2/3 failed with 1 errors and: corrupted on transfer: SHA1 hashes differ want "20686305e2a9c71069d9c49129ad9e5fcdebc7f2" vs got "3a8e804a1c0b9fc43fa2fa02cd269fa22825ffa9"
2026/08/09 16:24:23 ERROR : big.bin: Failed to copy: corrupted on transfer: SHA1 hashes differ want "20686305e2a9c71069d9c49129ad9e5fcdebc7f2" vs got "3a8e804a1c0b9fc43fa2fa02cd269fa22825ffa9"
2026/08/09 16:24:23 INFO : big.bin.c08084f0.partial: Removing failed copy
2026/08/09 16:24:23 ERROR : Attempt 3/3 failed with 1 errors and: corrupted on transfer: SHA1 hashes differ want "20686305e2a9c71069d9c49129ad9e5fcdebc7f2" vs got "3a8e804a1c0b9fc43fa2fa02cd269fa22825ffa9"
2026/08/09 16:24:23 INFO :
Transferred: 18 MiB / 18 MiB, 100%, 0 B/s, ETA -
Errors: 1 (retrying may help)
Elapsed time: 0.2s
2026/08/09 16:24:23 NOTICE: Failed to copy: corrupted on transfer: SHA1 hashes differ want "20686305e2a9c71069d9c49129ad9e5fcdebc7f2" vs got "3a8e804a1c0b9fc43fa2fa02cd269fa22825ffa9"