More disk space...

Method 1 : Add a u01 on /dev/sdb
If you need more disk space it looks like the EL Linux VMs were supplied with an extra unmounted disk. It is available at /dev/sdb but not partitioned. To make use of it:

# View partition info
vagrant ssh
su
cat /proc/partitions
parted -l

# Partition the unused drive
fdisk /dev/sdb
n
p
1
enter
enter
w

# format
mkfs.ext4 /dev/sdb1

# mount it
mkdir /u01
mount /dev/sdb1 /u01

# update fstab
/dev/sdb1       /u01    ext4    defaults        0       0

Method 2 : Add Swap via LVM

Format the raw device

fdisk /dev/sdb
n
p
1
"enter"
"enter"
t
8e
w
q
fdisk -l

Increase the Logical Volume

pvdisplay
lvmdiskscan
pvcreate /dev/sdb1
vgdisplay
vgextend vg_main /dev/sdb1
pvscan
lvdisplay
lvextend /dev/vg_main/lv_swap /dev/sdb1

Turn Swap off/on to Use new space

swapoff -v /dev/vg_main/lv_swap
mkswap /dev/vg_main/lv_swap
swapon -va
swapon -s

https://www.rootusers.com/how-to-increase-the-size-of-a-linux-lvm-by-adding-a-new-disk/
https://www.centos.org/docs/5/html/5.1/Deployment_Guide/s2-swap-extending-lvm2.html