文件被覆盖为一个0kb

[toutoumu]

我将一个存放在威联通中的265G的加密容器，通过smb协议挂载，然后在手机里用eds打开加密容器，浏览一些文件后，关闭容器然后出现截图这个情况，最后导致文件都没有了

[chenxiaolong]

Hmm, I wonder if rclone was trying to reupload the whole file. If you're willing to try and troubleshot the issue, please try this:

1. Update to RSAF 3.3.
2. Enable debug mode by long pressing the version number at the bottom.
3. Use the Add rclone internal cache remote option at the bottom. This will add a new remote named rclone_internal_cache.
4. Reproduce the problem with eds + smb remote.
5. Go to <RSAF rclone_internal_cache>/vfsMeta/<remote> in a file manager and open the file corresponding to your 265G file.

It should look something like this:

{
        "ModTime": "2025-02-16T10:26:11.594701668-05:00",
        "ATime": "2025-02-16T10:26:11.594701668-05:00",
        "Size": 1048576,
        "Rs": [
                {
                        "Pos": 0,
                        "Size": 1048576
                }
        ],
        "Fingerprint": "1048576,2025-02-16 15:25:51.362041794 +0000 UTC,b6d81b360a5672d80c27430f39153e2c",
        "Dirty": true
}

If it's trying to reupload the whole file, then Pos will be 0 and Size will be the full 265G.

[toutoumu]

Follow these steps, and the fifth step will most likely cause the phone to restart. At the same time, I found that even if the file size becomes 0kb, the disk does not release this space.

[chenxiaolong]

Hmm, I have no idea why it would cause the phone to restart. An app should not be able to crash the whole system. Maybe rclone filled up the whole storage?

---

I did some testing with smb + rclone mount --vfs-cache-mode writes on my desktop (same behavior as RSAF). It seems that rclone does not support partial writes. I created a 20 GiB file on my server, mounted it with rclone, and then changed 6 bytes at the end of the file. The vfsMeta file initially said that only 6 bytes were changed:

❯ cat ./vfsMeta/sm-1-smb/iso/test.bin
{
        "ModTime": "2025-02-21T22:41:27.413232176-05:00",
        "ATime": "2025-02-21T22:41:27.413232176-05:00",
        "Size": 21474836480,
        "Rs": [
                {
                        "Pos": 20401094656,
                        "Size": 6
                }
        ],
        "Fingerprint": "21474836480,2025-02-22 03:39:58.2486364 +0000 UTC",
        "Dirty": true
}

but then, a few seconds later, rclone said the entire file changed:

❯ cat ./vfsMeta/sm-1-smb/iso/test.bin
{
        "ModTime": "2025-02-21T22:41:27.413232176-05:00",
        "ATime": "2025-02-21T22:41:37.224895605-05:00",
        "Size": 21474836480,
        "Rs": [
                {
                        "Pos": 0,
                        "Size": 21474836480
                }
        ],
        "Fingerprint": "21474836480,2025-02-22 03:39:58.2486364 +0000 UTC",
        "Dirty": true
}

From the network traffic, I can see it downloaded and reuploaded the entire file.

Unfortunately, I think it's impossible to do what you want to do. rclone always wants to reupload everything.