Creating partitions

Question 1

Set label to xfs partition

Set label to ext4 partition

Answer 1

xfs_admin -L mypart1 /dev/xvdf1

tune2fs -L mypart2 /dev/xvdf2 or e2label /dev/xvdf2 mypart2

Question 2

Check FS

Answer 2

fsck.vfat /dev/xvdf1 - if partition is vfat type

fsck /dev/xvdf1 -if partition is ext2-4 types

Question 3

Show/dump ext2-ext4 FS info (blocks, size, inode etc)

The same for xfs type

Answer 3

dumpe2fs /dev/xvdf1

xfs_info /dev/xvdf1

Question 4

Repair xfs partition

Answer 4

xfs_repair /dev/xvdf1

Question 5

Extend LVMs

Answer 5

1. pvcreate /dev/sdd1
2. vgextend my_vg /dev/sdd1
3. lvextend -L 50G /dev/my_vg/my_lv
   or lvextend -L +10G /dev/my_vg/my_lv
4. xfs_growfs my_mount_point
   or resize2fs my_mount_point for ext2-ext4

Question 6

Create volume group

Answer 6

vgcreate my_vg /dev/sdb /dev/sdc

vgdisplay

Question 7

Create volume group

Remove volume group

Answer 7

vgcreate my_vg /dev/sdb1 /dev/sdc1
vgdisplay

vgremove my_vg

Question 8

Create logical volume

Remove logical volume

Answer 8

lvcreate -n my_lv -L 10G my_vg
lvdisplay

lvremove my_lv

Question 9

Format LVM with type xfs

Answer 9

mkfs.xfs -L my_xfs_lvm /dev/my_vg/my_lv

Question 10

Move from one PV to another

Answer 10

pvmove /dev/sdb1 /dev/sdd1

Question 11

Remove physical volume from a volume group

Answer 11

vgreduce my_vg /dev/sdb1

Question 12

VDO

Answer 12

1. yum install vdo kmod-kvdo
2. systemctl enable –now vdo
3. vdo create –name vdo1 –device /dev/nvme1n1 –vdoLogicalSize 1T
4. mkfs.xfs -K /dev/mapper/vdo1
5. udevadm settle
6. mkdir /vdo1
   man vdo to see fstab options
7. vim /etc/fstab:
   /dev/mapper/vdo1 /vdo1 xfs x-systemd.requires=vdo.service 0 0
8. mount -a
9. vdostats –human-readable