Exam XK0-005 topic 1 question 97 discussion

pvcreate /dev/sdb vgextend /dev/rootvg /dev/sdb lvresize –L +10G -r /dev/mapper/rootvg-rootlv

A. df -h /: To check the disk usage of the root filesystem. E. lvresize –L +10G -r /dev/mapper/rootvg-rootlv: To resize the logical volume and filesystem. H. vgextend /dev/rootvg /dev/sdb: To extend the volume group with a new physical volume if needed.

I would also like to think you would need to check first with df -h / then do lvresize along with vgextend I don't see the point in creating a whole other physical volume when you can just resize the logical volume and volume group.

Before you can extend the volume group with vgextend, you need to run pvcreate on the new disk/partition. Without this, the disk will not be recognized as part of LVM.

DEH. But in this order: DHE. D. 'pvcreate /dev/sdb' (Create a physical volume for LVM on the new disk.) H. 'vgextend /dev/rootvg /dev/sdb' (Extend volume group to include new disk.) E. 'lvresize –L +10G -r /dev/mapper/rootvg-rootlv' (Add space to logical volume.)

Confirm, then resize.

A. df -h /: This command will display the disk usage of the root filesystem in a human-readable format. It’s a good starting point to understand how much space is being used. C. growpart /dev/mapper/rootvg-rootlv: This command will resize the partition on the disk to use all available space. It’s necessary if the filesystem is smaller than the underlying logical volume. E. lvresize –L +10G -r /dev/mapper/rootvg-rootlv: This command will resize the logical volume to add an additional 10GB of space and resize the filesystem within the logical volume to use the additional space. fdisk -1 /dev/sdb is not a valid command, and lsblk /dev/sda would only list block devices and their sizes, but wouldn’t help in resolving the issue. Similarly, parted -l /dev/mapper/rootvg-rootlv would list partition layouts on a device, but wouldn’t help in resolving a full filesystem. Finally, vgextend /dev/rootvg /dev/sdb and pvcreate /dev/sdb would be used if you were adding a new physical disk to a volume group, which is not the case here.

Correct is pvcreate /dev/sdb vgextend /dev/rootvg /dev/sdb lvresize –L +10G -r /dev/mapper/rootvg-rootlv

A, E, and H are the commands that a systems administrator should use to resolve the issue of the root filesystem being full. A. The df -h / command is used to check the disk usage and available space on the root filesystem. E. The lvresize –L +10G -r /dev/mapper/rootvg-rootlv command is used to resize the logical volume to increase the root filesystem's size. H. The vgextend /dev/rootvg /dev/sdb command is used to extend the root volume group with the new disk /dev/sdb in order to increase the root filesystem's size.