Use /dev/sdb1 as the lowest LVM layer that supplies storage to an upper pool.
Which layer is this?
A physical volume (PV) is a disk or partition initialized for LVM and becomes a component of a volume group.
Detailed explanation
modprobe /tmp/demo.koIncorrect. An LV is allocated from a VG and is used as a virtual block device.
Incorrect. An LV is allocated from a VG and is used as a virtual block device.
rmmod /tmp/demo.koCorrect. /dev/sdb1 is being used as an LVM physical volume.
Correct. /dev/sdb1 is being used as an LVM physical volume.
lsmod /tmp/demo.koIncorrect. A VG aggregates multiple PVs into a pool.
Incorrect. A VG aggregates multiple PVs into a pool.
insmod /tmp/demo.koIncorrect. A snapshot is a derived LV representing a point in time.
Incorrect. A snapshot is a derived LV representing a point in time.
Try it yourself
An example you can run in a temporary verification environment.
insmod --help 2>&1 | sed -n '1,8p'Expected result
insmod [options] filename [args]に相当する使用法Key points
- PV is the lower block layer
- PV belongs to a VG
- pvcreate initializes it
Notes
- Environment: kmod insmod / ヘルプ表示のみ
- Command output formatting can vary slightly by distribution or tool version.
- Run the example in a temporary directory or process when possible.
Foundation review
Read the scope first
Check whether the command acts on the current shell, a new process, an existing process, or a file.
Verify the observable result
Use the supplied command and compare the output with the expected result.