View Full Version : [ubuntu] Disk Size vs. Available

March 30th, 2010, 08:44 PM
Running Ubuntu Server:
# cat /etc/issue
Ubuntu 8.04.3 LTS \n \l

I have 5 physical disks attached to this server, each with 1 partition.

Filesystem Size Used Avail Use% Mounted on
/dev/sda1 19G 1.6G 17G 9% /
/dev/sdb1 298G 237G 47G 84% /rsync01
/dev/sdc1 298G 251G 33G 89% /rsync02
/dev/sdd1 298G 283G 0 100% /rsync03
/dev/sde1 298G 220G 64G 78% /rsync04

My question is why is 283GB 100% of /dev/sdd1? The Size of the disk is 298G but I can only put 283GB of data on this disk. If you look at /dev/sda1, it will allow me to fill this disk to the full size of the disk (19GB). Any thoughts? All disks are EXT3.

Thank you.

March 30th, 2010, 08:48 PM
By default 5% of disk space is reserved for emergency use by root.

March 31st, 2010, 02:04 PM
Is there a way to change this? I'm losing 15GB per drive.

Thank you.

March 31st, 2010, 04:17 PM
Do you REALLY want to fill the whole drive up? If you do files tend to start getting fragmented. It is best to not worry about it unless you actually use up all of the space.

March 31st, 2010, 04:24 PM
This server is used from RSYNC (backups) only. From there, the data gets written to tape (or other media). I dont mind pushing the limits of the disk(s). Is there a way to remove this "emergency" reserve?

March 31st, 2010, 05:14 PM
man tune2fs