Re: Fdisk

[<tomas@tuxteam.de>]

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On Fri, Jan 20, 2017 at 11:59:36AM +0200, Georgi Naplatanov wrote:
> On 01/20/2017 11:54 AM, Gokan Atmaca wrote:
> > Hello
> > 
> > Debian is running as a VM on the KVM. I enlarged the disk with QEMU.
> > But the disk is as follows.
> > So he did not grow up.
> > 
> > Pre:
> > root@debian:/home/gokan# fdisk  -l
> > 
> > Disk /dev/sda:[b] 40 GiB[/b], 42949672960 bytes, 83886080 sectors
> > Units: sectors of 1 * 512 = 512 bytes
> > Sector size (logical/physical): 512 bytes / 512 bytes
> > I/O size (minimum/optimal): 512 bytes / 512 bytes
> > Disklabel type: dos
> > Disk identifier: 0x6845f24a
> > 
> > Device     Boot    Start      End  Sectors  Size Id Type
> > /dev/sda1  *        2048 80383999 80381952 38.3G 83 Linux
> > /dev/sda2       80386046 83884031  3497986  1.7G  5 Extended
> > /dev/sda5       80386048 83884031  3497984  1.7G 82 Linux swap / Solaris
> > 
> > root@debian:/home/gokan#
> > root@debian:/home/gokan# df -Th
> > Filesystem     Type      Size  Used Avail Use% Mounted on
> > /dev/sda1      ext4       38G  908M   35G   3% /
> > udev           devtmpfs   10M     0   10M   0% /dev
> > tmpfs          tmpfs     201M  4.4M  196M   3% /run
> > tmpfs          tmpfs     501M     0  501M   0% /dev/shm
> > tmpfs          tmpfs     5.0M     0  5.0M   0% /run/lock
> > tmpfs          tmpfs     501M     0  501M   0% /sys/fs/cgroup
> > 
> > Post:
> > root@debian:/home/gokan# fdisk -l
> > 
> > Disk /dev/sda:[b] 50 GiB[/b], 53687091200 bytes, 104857600 sectors
> > Units: sectors of 1 * 512 = 512 bytes
> > Sector size (logical/physical): 512 bytes / 512 bytes
> > I/O size (minimum/optimal): 512 bytes / 512 bytes
> > Disklabel type: dos
> > Disk identifier: 0x6845f24a
> > 
> > Device     Boot    Start      End  Sectors  Size Id Type
> > /dev/sda1  *        2048 80383999 80381952 38.3G 83 Linux
> > /dev/sda2       80386046 83884031  3497986  1.7G  5 Extended
> > /dev/sda5       80386048 83884031  3497984  1.7G 82 Linux swap / Solaris
> > 
> > root@debian:/home/gokan#
> > root@debian:/home/gokan# df -Th
> > Filesystem     Type      Size  Used Avail Use% Mounted on
> > /dev/sda1      ext4       38G  908M   35G   3% /
> > udev           devtmpfs   10M     0   10M   0% /dev
> > tmpfs          tmpfs     201M  4.4M  196M   3% /run
> > tmpfs          tmpfs     501M     0  501M   0% /dev/shm
> > tmpfs          tmpfs     5.0M     0  5.0M   0% /run/lock
> > tmpfs          tmpfs     501M     0  501M   0% /sys/fs/cgroup
> > 
> > How can I grow this disc?
> 
> Hi,
> 
> after enlarging disk or logical volume (in case of LVM), you have to
> enlarge file system.

Exactly. The disk is bigger now, but you have to do something with
this extra space.

 (1) You could make an extra partition (that would go after sda5,
     that is your swap space) and put a file system on it, then
     e.g. mount it

 (2) you could try to add your new space to your existing swap
     partition. Just disable swap (swapoff), enlarge sda5 (fdisk),
     make new swap (mkswap), re-enable swap (swapon).

 (3) you could try to add your new space to your existing root
     partition (sda1). Problem is, the swap is on the way. So
     first disable swap, remove swap partition (as in (2)), delete
     swap partition (fdisk), enlarge sda1 (still fdisk), re-create
     swap at the end (still fdisk). When finished, and all is
     well, then you can resize your file system (resize2fs). Note
     that root can't be mounted read/write for that.

 (4-n) you could use LVM...

I guess you want (3).

Regards
- -- t
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