Storage Management and LVM-Thin Configuration

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haldarritam

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Jan 19, 2024
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Hello everyone,

I’m reaching out to you all as I’ve encountered a bit of a puzzle with my mini PC setup. I’m fairly new to this, so any guidance would be greatly appreciated!

Here’s my current setup: I have a mini PC equipped with a 1TB NVMe SSD and a 1TB SATA HDD. I’m running Proxmox on the PC, which is installed on the NVMe SSD. As far as I understand, it seems to have been configured as an LVM-Thin by default. I’ve got a couple of Ubuntu VMs and a few Ubuntu/Debian LXCs running smoothly on the device. For the sake of consistency, I’ve also configured the HDD as an LVM-Thin. If this isn’t a good idea, please do let me know!

I’ve assigned the entire HDD storage to one LXC that’s running Debian and hosting a NAS using Samba. I’ve done the same with another LXC for a portion of the NVMe. I access these NASs from my VMs and store data in them. Recently, I’ve almost filled up the HDD.

In an attempt to free up some space, I deleted some large, unnecessary files through my VM that has the NAS mounted on it. However, when I check in the Proxmox GUI, the storage doesn’t seem to get freed up.

After doing some research, I learned that I need to manually run fstrim to free the storage. I ran fstrim on the Host Shell (Proxmox shell) and even set up a cron job for it. The logs show a significant amount of storage being freed from the HDD (which is /dev/sda), but the GUI still shows the storage to be full.

I’m a bit stumped here. What could I be missing? I’m open to running any commands that might help diagnose the issue.

Thanks in advance for your help!
 
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