Failed to sync: optional feature not implemented

What is the problem you are having with rclone?

Context: macOS 12.7.1 (Monterey)

The binary is crontably retrieved monthly using wget -P ~/Downloads/ https://downloads.rclone.org/rclone-current-osx-amd64.zip

Since upgrading from rclone 1.65.2 to 1.66.0 (rclone-v1.66.0-osx-amd64), backing up—very suddenly and utterly abruptly—no longer works.

To my greatest surprise, I've got the horrible “I/O errors”—somewhat the end of the world—all over the log file along with the very mysterious Failed to sync: optional feature not implemented

I immediately reverted back to version 1.65.2 and everything did work magically with not a single error at all. So, obviously, there is an alien in 1.66.0 that shouldn't be there, at the very least, for the grumpy I am, who needs to run an older macOS version on an older Intel-based machine.

Run the command 'rclone version' and share the full output of the command.

% rclone --version
rclone v1.66.0
- os/version: darwin 12.7.1 (64 bit)
- os/kernel: 21.6.0 (x86_64)
- os/type: darwin
- os/arch: amd64
- go/version: go1.22.1
- go/linking: dynamic
- go/tags: cmount

Which cloud storage system are you using? (eg Google Drive)

SFTP

The command you were trying to run (eg rclone copy /tmp remote:tmp)

rclone -Lv --log-file=/tmp/rclone.log --filter-from /usr/local/etc/rclone/filter_mbp.txt sync ~ Safe:/MBP/ \
             --backup-dir Safe:/OLD/MBP/$date

The rclone config contents with secrets removed.

[Safe]
type = crypt
remote = Lens:/home/…/RESCUE
filename_encryption = standard
password = …
password2 = …
directory_name_encryption = true

[Lens]
type = sftp
host = 192.…
user = l
port = 2
key_use_agent = true
md5sum_command = md5sum
sha1sum_command = sha1sum
shell_type = unix

[mini]
type = sftp
host = mini.local
user = h
port = 2
key_use_agent = true
md5sum_command = md5sum
sha1sum_command = sha1sum
shell_type = unix

A log from the command with the -vv flag

Details:

% tail -f /tmp/rclone.log

2024/04/02 20:03:30 Failed to sync: optional feature not implemented

Folder: ~/
-------
2024/04/03 00:14:07 INFO  : .config/joplin-desktop/log.txt: Moved (server-side)
2024/04/03 00:14:08 INFO  : .config/joplin-desktop/log.txt: Copied (new)
2024/04/03 00:14:21 ERROR : Encrypted drive 'Safe:/MBP/': not deleting files as there were IO errors
2024/04/03 00:14:21 ERROR : Encrypted drive 'Safe:/MBP/': not deleting directories as there were IO errors
2024/04/03 00:14:21 ERROR : Attempt 1/3 failed with 1 errors and: optional feature not implemented
2024/04/03 00:14:36 ERROR : Encrypted drive 'Safe:/MBP/': not deleting files as there were IO errors
2024/04/03 00:14:36 ERROR : Encrypted drive 'Safe:/MBP/': not deleting directories as there were IO errors
2024/04/03 00:14:36 ERROR : Attempt 2/3 failed with 1 errors and: optional feature not implemented
2024/04/03 00:14:51 ERROR : Encrypted drive 'Safe:/MBP/': not deleting files as there were IO errors
2024/04/03 00:14:51 ERROR : Encrypted drive 'Safe:/MBP/': not deleting directories as there were IO errors
2024/04/03 00:14:51 ERROR : Attempt 3/3 failed with 1 errors and: optional feature not implemented
2024/04/03 00:14:51 INFO  :
Transferred:       19.461 MiB / 19.461 MiB, 100%, 218.040 KiB/s, ETA 0s
Errors:                 1 (retrying may help)
Checks:             45643 / 45643, 100%
Renamed:                1
Transferred:            1 / 1, 100%
Server Side Moves:      1 @ 19.449 MiB
Elapsed time:        46.0s

Apart from this, I'm very happy with rclone, and as always thank you very much for the hard work, dedication and passion put into this little utility. Good job.

This is the following issue, fixed in the latest beta.

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