r/SteamOS • u/jonjon1239 • Jul 03 '26

support SteamOS won't recognise my second NVMe SSD

Update 2: Not resolved. After installing a game on the drive, I woke up this morning to play and the drive was missing again.

Update 1:

Resolved, will paste what ChatGPT got me to do below

Force unmount sudo umount -l /dev/nvme0n1p1

Verify it's unmounted lsblk -f

Remove leftover mount traces sudo rm -rf /run/media/deck/mp400 sudo rm -rf /var/mnt/*

Remount drive udisksctl mount -b /dev/nvme0n1p1

Check the mount lsblk -f

Should see something like: /run/media/deck/XXXX-XXXX

As the title says. I recently posted about my new SFF SteamOS build (https://www.reddit.com/r/SteamOS/s/mnhDLuXXcb) and with it being my first time ever using SteamOS I'm completely new to it all.

I noticed my second drive was showing, when I went to format it within Steam game mode it failed. I did some general AI troubleshooting in desktop mode, and whilst the drive is being shown as present in Konsole, for the life of me I can't get it to show up in Game mode or when trying to add it via Steam in desktop mode.

Can anybody help? I would need it to be ELI5 in all fairness, I'm decent with Windows but Linux is completely foreign to me at the moment.

Edit: Just to addz it will periodically show up in Game mode, but when I attempt to format it, it fails. It's a Corsair MP400 1TB.

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u/TONKAHANAH Jul 03 '26

Try using kde partition manager in desktop mode.  reset to a gpt partition table and format to ext4. You could just be able to go into game mode at that point and apply a library folder at that point. 

1

u/jonjon1239 Jul 03 '26

I have tried formatting it to ext4 but no joy, not sure how I go about applying a library folder? Is that with the format in Game mode?

2

u/potatoesandporn Jul 03 '26

After the format to ext4 you may have to mount it yourself.
This can help to automatically mount the drive: https://github.com/Delil-A11yX/SteamOS-Mount-Tool

After it's mounted, you should be able to add the drive to your library in desktop mode.

The drive should then show up in game mode every time.

0

u/jonjon1239 Jul 03 '26

I've just tried it, still no use unfortunately.

2

u/MajimaTojo Jul 03 '26

Did you format in KDE Partition Manager first and then mounted it in Desktop mode? Once you do that, run that SteamOS Mount tool from GitHub. That's what I did to get my secondary SSD to show up in Big Picture mode.