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On a ubuntu server I own, I am running out of space. When I ran

sudo parted /dev/sda -l

to find all available drives, I got this:

Model: ATA ST31000528AS (scsi) Disk /dev/sda: 1000GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 1049kB 256MB 255MB primary ext2 boot 2 257MB 1000GB 1000GB extended 5 257MB 1000GB 1000GB logical lvm Model: Linux device-mapper (linear) (dm) Disk /dev/mapper/server--vg-swap_1: 2135MB Sector size (logical/physical): 512B/512B Partition Table: loop Number Start End Size File system Flags 1 0.00B 2135MB 2135MB linux-swap(v1) Model: Linux device-mapper (linear) (dm) Disk /dev/mapper/server--vg-root: 998GB Sector size (logical/physical): 512B/512B Partition Table: loop Number Start End Size File system Flags 1 0.00B 998GB 998GB ext4

I understand /dev/mapper/server--vg-root is the filesystem, and /dev/sda1 has some stuff related to GRUB.

But, what about /dev/sda2 and /dev/sda5? When I tried to mount /dev/sda2, it said that I needed to specify the file system, which according to the table, is nonexistent. So, is it safe to format this with, say ext4 and mount it?

Also, when I tried to mount /dev/sd5, it gave me this error:

mount: unknown filesystem type 'LVM2_member'

I assume it is NOT save to reformat this. If I'm wrong, then that would be great, because I could save some space. Please let me know either way. Thanks in advance!

UPDATE: Here is the result of mount:

/dev/mapper/server--vg-root on / type ext4 (rw,errors=remount-ro) proc on /proc type proc (rw,noexec,nosuid,nodev) sysfs on /sys type sysfs (rw,noexec,nosuid,nodev) none on /sys/fs/fuse/connections type fusectl (rw) none on /sys/kernel/debug type debugfs (rw) none on /sys/kernel/security type securityfs (rw) udev on /dev type devtmpfs (rw,mode=0755) devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620) tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755) none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880) none on /run/shm type tmpfs (rw,nosuid,nodev) /dev/sda1 on /boot type ext2 (rw,acl) /dev/sda1 on /media/hd2 type ext2 (rw)
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No!

/dev/sda contains:

  • a small /dev/sda1 which is needed to boot.
  • a extended partition /dev/sda2

The extended partition contains a logical partition /dev/sda5.

The logical partition contains a LVM setup, broken down into to two logical volumes:

  • /dev/mapper/server--vg-swap_1 which is your swap space
  • /dev/mapper/server--vg-root which is your root (/) partition where everything is stored.

There is nothing there that is unused, so the bottom line is you are out of space.

You will need to add additional storage to the system. Luckily, you have LVM so you can add it to the volume group and simply expand the logical volume server--vg-root and then the filesystem within it.

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sda2 is kind of like a 'suitcase' holding all extended partitions. You can't delete it. sda5 is the only partition in the 'suitcase', and is your LVM physical volumes. You can't delete it.

To actually see what you have spare space wise, use these commands:

df -h : Shows the free space on all your volumes (you might be able to reclaim some space)

vgs : Shows all your volume groups, and VFree is the free space (possibly none)

lvs : Shows all your volumes (in case you have an unused volume you can delete)

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