Rclone union disc activity

[sandiegoboy (Gabriel)]

What is the problem you are having with rclone?

I am using rclone union with two local drives L: and M: (two volumes on the same disc) then mounting then as I:
Is it normal to see disc activity when nothing is writing on the discs? (L and M on resource monitor - Windows 10 )

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

rclone v1.69.1
- os/version: Microsoft Windows 10 Pro 22H2 22H2 (64 bit)
- os/kernel: 10.0.19045.5487 (x86_64)
- os/type: windows
- os/arch: amd64
- go/version: go1.24.0
- go/linking: static
- go/tags: cmount

Are you on the latest version of rclone? You can validate by checking the version listed here: Rclone downloads
-->
Yes same situation with previous version

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

None - local drive

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

None - issue is disc activity in the abscense of rclone command or any through local disc

Please run 'rclone config redacted' and share the full output. If you get command not found, please make sure to update rclone.

>rclone config redacted
[IDrive]
type = union
upstreams = L: M:
### Double check the config for sensitive info before posting publicly

A log from the command that you were trying to run with the -vv flag

None

[asdffdsa (jojothehumanmonkey)]

welcome to the forum,

@sandiegoboy

Is it normal to see disc activity when nothing is writing on the discs?

can use task manager, resource monitor and such tools to figure out what is accessing the I:

@sandiegoboy

type = union
upstreams = L: M:

just curious, why use union instead of native os commands?

[sandiegoboy (Gabriel)]

I am using resmon and dont see anything reading L or M (or I:)
I am not sure I understand the second question?? I have two volumes I want to join together. There is no OS equivalent to do this hence downloaded rclone

[asdffdsa (jojothehumanmonkey)]

@sandiegoboy

I am not sure I understand the second question??
I have two volumes I want to join together. There is no OS equivalent to do this hence downloaded rclone

mklink /j b:\root\cdrive c:\  
Junction created for b:\root\cdrive <<===>> c:\

mklink /j  b:\root\ddrive d:\ 
Junction created for b:\root\ddrive <<===>> d:\

subst i: b:\root 

dir  i:\
02/20/2025  09:45 AM    <DIR>          .
02/20/2025  09:45 AM    <JUNCTION>     cdrive [c:\]
02/20/2025  09:45 AM    <JUNCTION>     ddrive [d:\]

[sandiegoboy (Gabriel)]

Thanks for answering.
This is the situation, I have two volumes L: and M: - I rather have one larger volume.
I want to be able to make them appear as one (I:) with capacity = Capacity L + Capacity M
I would like to interact with I: normally and just create folders + add files and they would be created on I (in the background likely they would exist on L or M but that is transparent and things are placed appropriately to maximize the combined space)

I think mkdir junction just present one folder as a link in another but the capacitty is not "managed" right?