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I've a legacy dedicated server with Ubuntu onboard (console mode only). Based on docs (prices etc.) I see that server must have 250+ GB, but I see significantly less:

$ df -h Filesystem Size Used Avail Use% Mounted on /dev/md1 3.7G 1.6G 2.2G 43% / none 2.0G 196K 2.0G 1% /dev none 2.0G 0 2.0G 0% /dev/shm none 2.0G 3.2M 2.0G 1% /tmp none 2.0G 84K 2.0G 1% /var/run none 2.0G 0 2.0G 0% /var/lock none 2.0G 0 2.0G 0% /lib/init/rw /dev/mapper/vg00-usr 4.0G 2.2G 1.9G 55% /usr /dev/mapper/vg00-var 4.0G 1.9G 2.2G 48% /var /dev/mapper/vg00-home 4.0G 1.8G 2.3G 45% /home

I've no idea who/when and how configure that server. Unfortunately, I can't reinstall it from the scratch.

So my question, how can I find free partions/unallocated spaces?

Just in case it's so easy:

$ fdisk -l Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x4ed88842 Device Boot Start End Blocks Id System /dev/sda1 1 487 3911796 fd Linux raid autodetect /dev/sda2 488 731 1959930 82 Linux swap / Solaris /dev/sda3 732 60801 482512275 fd Linux raid autodetect Disk /dev/sdb: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0b9943b0 Device Boot Start End Blocks Id System /dev/sdb1 1 487 3911796 fd Linux raid autodetect /dev/sdb2 488 731 1959930 82 Linux swap / Solaris /dev/sdb3 732 60801 482512275 fd Linux raid autodetect Disk /dev/md1: 4005 MB, 4005560320 bytes 2 heads, 4 sectors/track, 977920 cylinders Units = cylinders of 8 * 512 = 4096 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/md1 doesn't contain a valid partition table Disk /dev/md3: 494.1 GB, 494092484608 bytes 2 heads, 4 sectors/track, 120628048 cylinders Units = cylinders of 8 * 512 = 4096 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/md3 doesn't contain a valid partition table
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You have two 500GB hard disks. They are configured to have the first partition (4 GB) mirrored as a RAID for / (/dev/md1), two 2 GB partitions (one on each disk) for swap and another RAID mirror taking up the remaining space (/dev/md3).

I assume that /dev/md3 is configured as a physical volume for LVM, containing the volume group vg00, which in turn has three 4GB volumes (for /home, /usr and /var).

You can check the status of the LVM with vgdisplay and either extend existing volumes with lvextend or create new ones in the empty space with lvcreate.

For more infos, see the manual pages for the commands I listed.

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  • In my case it was sequence of lvextend + xfs_growfs Commented Feb 11, 2013 at 11:14
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It seems that you are running lvm on your disk. Run the vgdisplay command to see available space.

vgdisplay

To add more space to a logical volume, you can use lvextend.

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