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archrevived

Member

Registered: 2024-03-19

Posts: 1

Weird disk space reporting, running out quickly?

Hi all, something weird is going on with my drives.
They seem to be running out of space too quickly, I was hoping someone could help me understand.

df -H outputs

Filesystem      Size  Used Avail Use% Mounted on
dev              34G     0   34G   0% /dev
run              34G  1.8M   34G   1% /run
efivarfs        132k   51k   76k  41% /sys/firmware/efi/efivars
/dev/nvme0n1p2   21G   16G  4.2G  80% /
tmpfs            34G   56M   34G   1% /dev/shm
tmpfs            34G   16M   34G   1% /tmp
/dev/nvme1n1p1  984G  934G   69M 100% /mnt/storage
/dev/nvme0n1p1  536M   77M  460M  15% /boot
/dev/nvme0n1p3  845G  9.6G  792G   2% /home
tmpfs           6.7G   50k  6.7G   1% /run/user/1000

So first thing that pops up is you can see it has 50G free, why is it saying theres 69M "availble"?

sudo ncdu /mnt/storage:

Total disk usage: 869.2 GiB   Apparent size: 868.9 GiB   Items: 202,493

Why does it report as lower for ncdu?

Also my main drive looks like it has a good 4G left, so why is my OS complaining it can't even open files in certain apps?

frostschutz

Member

Registered: 2013-11-15

Posts: 1,647

Re: Weird disk space reporting, running out quickly?

ext4 root reserve? (disable with tune2fs -m 0)

otherwise generic filesystem overhead, and then just whatever is taking up your space (ncdu should help find the culprits if it's something unexpected)

if any files were deleted recently, they'll continue to occupy space if there is any running process that still has a filehandle on them. but this should be gone after reboot at the latest, so people usually don't ask about it.