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[7.1.4] Unable to mount similar USB disks

  • Closed
  • Minor

I am using UNRAID since two days and this is really an awesome product - I'm still in my trial period but on the verge of buying the license. Good job.

If I'm very new to unraid, I a long time unix/linux user so I think this following is really an issue.

I use F6-424MAX Terramaster with a dual disk docking station (most likely this is not dependent on the device, but report have to be as precise as possible, don't they ?)

https://www.amazon.fr/dp/B0C2GKJ6ZJ?ref=fed_asin_title&th=1

I use two 20 Tb Toshiba MG series disks (model: TOSHIBA_MG10ACA20TE) in the docking station - they are identical (exact same model, only serial number differs)

Unraid determines /mnt/disks/1.44.1-72806 as the mount point for both of them

I don't know how this name is determined, but I guess it is based on disk characteristics, that appear to be the same here

So mount point is the same for the two disks

At O/S level, it is OK (/dev/sda for one, /dev/sdi for the other)

But, of course, no two disks can mount on /mnt/disks/1.44.1-72806

So only one succeeds and is mounted.

On the GUI, no error displayed, no option offered (MOUNT button not displayed (well, not a bad idea to hide it, would not work anyway))

When opening the detail, it is not possible to change the default mount directory

The problem has a very simple workaround using bash. Mounting the second one manually on a different directory will work, it will appear on the GUI and all is fine.

The included diagnostic file has been built after that workaround was in place (/mnt/usb2 is the directory name I used) so you will find the two disks mounted and working.

Suggested improvements :

1- change directory name build function to include serial number so to avoid name collision,

2- improve information displayed on the GUI - I guess a mount attempt failed so I would expect some error to be notified somewhere (maybe it is but then not visible enough)

3- ability to override default name for mount directory - that would offer the ability to use the workaround without using bash,

4- On the GUI ("Main" page, "Unassigned disk Devices" section), after the fix, the two disks are displayed, with their UNMOUNT button (ok) but the link to browse is 1.44.1-72806 for both of them - this means that what is displayed is the expected mount directory, not the real mount directory. Should the GUI query the mounted drives, it would see that sdi is not mounted on /mnt/disks/1.44.1-72806 (what it tried to do) but on /mnt/usb2 (where it is really mounted) - I think this should display what is not what you you expect it to be

This might not sound a big deal but this means you click on a disk and browse the other - might lead to mistakes !

Hope this helps

tm-diagnostics-20250720-1812.zip

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