Q 1: fdisk divided into many areas, but the bottom in w forget to save, how to solve it?
A 1: fdisk / dev / sdc then enter the d delete
Question 2: Cancel disk partitions, fdisk / dev / sdc enter p for viewing, no, fdisk -l / dev / sdc view is not, however, is not created how to solve?
Answer 2: partprobe / dev / sdc // partprobe command: change notification system partition tables
Question 3: Dynamic disk extended partition, how do you know how much space you can expand it?
Answer 3: Figure
Question 4: What is that PE is not it?
A 4: In LVM PE (Physical Extend) is the smallest unit of volume, 4M default size, just like our data is stored as page volume is stored in the form of PE. PV (Physical Volume) are physical volumes, to use a logical volume, the first operation is a first physical disk formatted into physical partitions or PV, PV after formatting a logical volume that can provide a PE.
reference:
https://blog.csdn.net/axlchen/article/details/77200980 "LVM real dynamic expansion of the root partition"
https://www.cnblogs.com/lbole/p/8904298.html "disk partitions and logical volumes under Linux"