16. lvm 磁盘故障小案例

4.10 lvm

1.准备磁盘分区：

fdisk /dev/sdb

n 创建三个新分区，分别1G

t 改变分区类型为8e

2.准备物理卷

pvcreate /dev/sdb1

pvcreate /dev/sdb2

pvcreate /dev/sdb3

pvdisplay/pvs 列出当前的物理卷

pvremove /dev/sdb3 删除物理卷

yum provides "/*/pvcreate"

yum -y install lvm2

partprobe - inform the OS of partition table changes

partprobe is a program that informs the operating system kernel

of partition table changes, by requesting that

the operating system re-read the partition table.

# partprobe

pvcreate - Initialize physical volume(s) for use by LVM

# pvcreate /dev/sdb1

WARNING: xfs signature detected on /dev/sdb1 at offset 0. Wipe it? [y/n]: y

Wiping xfs signature on /dev/sdb1.

Physical volume "/dev/sdb1" successfully created.

pvdisplay - Display various attributes of physical volume(s)

# pvdisplay

"/dev/sdb1" is a new physical volume of "1.00 GiB"

--- NEW Physical volume ---

PV Name /dev/sdb1

VG Name

PV Size 1.00 GiB

Allocatable NO

PE Size 0

Total PE 0

Free PE 0

Allocated PE 0

PV UUID 0TaR4c-d2Z7-3Der-Y5aO-w0dd-ndri-NOsc81

pvs - Display information about physical volumes

# pvs

PV VG Fmt Attr PSize PFree