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Partition Question

rated 0 times [ 0] [ 0] / answers: 1 / hits: 452 / 2 Years ago, sun, april 17, 2022, 3:30:36

When i'm looking at my Disk Utility, I have 3 partitions:

Filesystem | Partition 1 | 99 MB FAT

Filesystem | Partition 2 | 636 GB Ext4

Swap | Partition 3 | 3.7 GB Swap

What are the three for? Can I delete any of these?

christopher@christopher-Ubuntu:~$ sudo blkid

[sudo] password for christopher: 

/dev/sda1: UUID="B566-A28C" TYPE="vfat" 

/dev/sda2: UUID="efea80ee-715a-44de-9c74-57b38fc9b25c" TYPE="ext4" 

/dev/sda3: UUID="7b763a32-e4c4-48a1-9ced-1b87ef3d80fd" TYPE="swap" 



christopher@christopher-Ubuntu:~$ fdisk -l

christopher@christopher-Ubuntu:~$ sudo free

             total       used       free     shared    buffers     cached

Mem:       3436848    1256972    2179876          0      65776     577704

-/+ buffers/cache:     613492    2823356

Swap:      3639292          0    3639292



christopher@christopher-Ubuntu:~$ df -h

Filesystem      Size  Used Avail Use% Mounted on

/dev/sda2       584G  6.5G  548G   2% /

none            4.0K     0  4.0K   0% /sys/fs/cgroup

udev            1.7G  8.0K  1.7G   1% /dev

tmpfs           336M  1.2M  335M   1% /run

none            5.0M     0  5.0M   0% /run/lock

none            1.7G  288K  1.7G   1% /run/shm

none            100M   40K  100M   1% /run/user

/dev/sda1        93M  2.2M   91M   3% /boot/efi

sudo fdiks -l:

WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted.



Disk /dev/sda: 640.1 GB, 640135028736 bytes

255 heads, 63 sectors/track, 77825 cylinders, total 1250263728 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 4096 bytes

I/O size (minimum/optimal): 4096 bytes / 4096 bytes

Disk identifier: 0x16a83e64



   Device Boot      Start         End      Blocks   Id  System

/dev/sda1               1  1250263727   625131863+  ee  GPT

Partition 1 does not start on physical sector boundary.

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algicuade

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2 Years ago

answered 2 Years ago brailloni · Accepted Answer

Third partition is Swap:

Swap space in Linux is used when the amount of physical memory (RAM) is full. If the system needs more memory resources and the RAM is full, inactive pages in memory are moved to the swap space. While swap space can help machines with a small amount of RAM, it should not be considered a replacement for more RAM. Swap space is located on hard drives, which have a slower access time than physical memory.

Swap space can be a dedicated swap partition (recommended), a swap file, or a combination of swap partitions and swap files.

Swap should equal 2x physical RAM for up to 2 GB of physical RAM, and then an additional 1x physical RAM for any amount above 2 GB, but never less than 32 MB.

I'm not sure about the 1st partition, but your system(OS) should be installed in 2nd partition that you can't delete.

Yes you can delete/disable/enable/add/remove 3rd partition i,e Swap.

But it is not recommended to not allot any memory space for swap.

Here is the command which you can use to enable/disable swap memeory:

to disable:

sudo swapoff -a

to enable:

sudo swapon -a

Get more info:

sudo swapoff -h

or

sudo swapon -h

If you provide some more information by posting the output of these commands then I'll be able to give some more information:

sudo blkid

sudo fdisk -l

sudo free

df -h

Reply if you need further assistance..