Data Disk - Use Data Disk as SWAP

This tutorial helps you create swap in data disk.

We will make disk structure to:

/dev/vda – os disk
— /dev/vda1 – /boot
— /dev/vda2 – LVM (/ included)
/dev/vdb – data disk
— /dev/vdb1 – …
— /dev/vdb2 – …
— /dev/vdb3 – SWAP
/dev/vdc – initialization file

We will use /dev/vdb3 as SWAP. If you don’t know how to create partition, please refer to:

1. Create Partition and Mount it to /home

2. Create Partition and Merge it with OS Disk

Warning: it will cause /dev/vdb3 lost, please make sure there is no data in /dev/vdb3.

1. Create SWAP

mkswap /dev/vdb3

2. Edit fstab

echo "/dev/vdb3 none swap defaults 0 0" >> /etc/fstab

3. Mount SWAP

swapon -a

Check SWAP status with free

free -m

In this tutorial, output will be:
total used free shared buffers cached
Mem: 994 361 632 0 11 297
-/+ buffers/cache: 53 940
Swap: 2047 0 2047

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