[SOLVED] Space missing from ext4 filesystem Ubuntu 10.10

Intiakel · 12-26-2010, 05:16 PM

I have a 6x1TB RAID5 set up for testing on ubuntu created with mdadm and formatted with an ext4 fs.

This is being shared over CIFS for windows clients. When looking at the fs from both the file box and the clients, it says 4.47TiB total capacity, and 4.24TiB free space. The only folder is Lost+Found which is empty.

I don't have much experience in Linux filesystems as of yet and I don't understand where this 300 gigs has gone!

Is it something to do with journaling?

Any help is appreciated
Dan.

bryanl · 12-26-2010, 06:15 PM

check tune2fs -l to check the reserved block count. Reserving 5% for system use is the default. tune2fs -m 0 will eliminate that if you don't need to reserve any space for system logs or whatever to avoid problems when the drive fills up.

On large data drives, that 5% default reserve adds up.

Intiakel · 12-26-2010, 11:19 PM

Quote:

Originally Posted by bryanl

check tune2fs -l to check the reserved block count. Reserving 5% for system use is the default. tune2fs -m 0 will eliminate that if you don't need to reserve any space for system logs or whatever to avoid problems when the drive fills up.

On large data drives, that 5% default reserve adds up.

That was exactly the solution, thanks Bryan!