Dropbox mount - cache issue

What is the problem you are having with rclone?

I'm using dropbox mount in addition of gdrive mount and a local folder. During plex scan, the dropbox mount stopped. Both union folder and dropbox are no more reachable from finder.

In logs, i have following message "vfs cache: failed to _ensure cache vfs reader: failed to write to cache file: "

Issue is present using unionfs mount or rclone union. Google Drive mount remains valid.

What is your rclone version (output from rclone version)

rclone v1.55.0-beta.5162.f50b4e51e

  • os/arch: darwin/amd64
  • go version: go1.16rc1

Which OS you are using and how many bits (eg Windows 7, 64 bit)

macOS 11.2

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

Google Drive

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

Dropbox mount : /usr/local/bin/rclone mount Dropbox:/Medias /Users/user/Dropbox --allow-other --vfs-cache-mode=full --vfs-read-ahead=128M --fast-list --rc-addr=locahost:5573 --log-level=DEBUG --log-file=/Users/user/Library/logs/rclone/dropbox.log -o modules=iconv,from_code=UTF-8,to_code=UTF-8-MAC
Google drive mount: /usr/local/bin/rclone mount ShareDrive:user /Users/user/MDD --allow-other --dir-cache-time=1000h --poll-interval=15s --umask=002 --vfs-cache-mode=full --vfs-read-ahead=128M --bwlimit=0 --stats=1s --fast-list --rc --vfs-cache-max-size=100G --log-file=/Users/user/Library/logs/rclone/mdd.log
Rclone union : /usr/local/bin/rclone mount Union: /Users/user/Medias --log-file=/Users/user/Library/logs/rclone/union.log

The rclone config contents with secrets removed.

type = drive
client_id = 
client_secret = 
scope = drive
token = 
team_drive = 
server_side_across_configs = true

type = crypt
remote = Google:/Medias
filename_encryption = standard
directory_name_encryption = true
password = 
password2 = 

type = dropbox
token = 
client_id = 
client_secret = 
chunk_size = 128M
impersonate = .com

type = union
remotes = /Users/user/local /Users/user/MDD /Users/user/Dropbox

A log from the command with the -vv flag


The log says this

2021/02/08 11:00:44 ERROR : file.mkv: vfs cache: failed to download: vfs reader: failed to write to cache file:

Repeated a few times and then this

2021/02/08 11:03:54 ERROR : IO error: vfs reader: failed to write to cache file:

Is there definitely nothing after the "failed to write to cache file:" in the log? There should be a helpful error message there!

Can you look in the VFS cache directory (rclone help flags cache-dir will show you the default location) to see if the file got created at all?

Is it possible the disk got full?

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