求VPS
今天易秋网络老易给客户一个机器磁盘做LVM扩容的时候，发现有这个错误提示。2块1TB的磁盘，LVM分区扩容后成2TB。当我敲pvcreate /dev/sdb1是时候，提示：Can’t initialize physical volume “/dev/sdb1” of volume group physical volume not initialized.为什么会出现这个情况呢，大概就是以前做过lvm分区，以前的记录没有删除。如何解决这个问题呢。其实很简单，加个参数类似强制执行的意思，pvcreate -ff -y /dev/sdb1就可以了。下面把操作过程简单说明下。
操作前的一些情况：
[root@E3-1230-265 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/rootvg-rootlv 927G 1.4G 926G 1% /
devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs 7.8G 0 7.8G 0% /dev/shm
tmpfs 7.8G 8.7M 7.8G 1% /run
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
/dev/sda1 494M 138M 357M 28% /boot
tmpfs 1.6G 0 1.6G 0% /run/user/0[root@E3-1230-265 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 931.5G 0 disk
├─sda1 8:1 0 500M 0 part /boot
└─sda2 8:2 0 931G 0 part
├─rootvg-rootlv 253:0 0 927G 0 lvm /
└─rootvg-swaplv 253:1 0 4G 0 lvm [SWAP]
sdb 8:16 0 931.5G 0 disk
└─sdb1 8:17 0 931.5G 0 part
[root@E3-1230-265 ~]# pvdisplay
--- Physical volume ---
PV Name /dev/sda2
VG Name rootvg
PV Size 931.02 GiB / not usable 4.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 238341
Free PE 0
Allocated PE 238341
PV UUID 52lO1Y-coo9-QTVK-Ib4U-y2Fm-7w55-zJ0BlH
WARNING: Device for PV 1D66dK-SyWK-Vm1I-Rgdx-TyA4-tHXB-0LFEGu not found or rejected by a filter.
--- Physical volume ---
PV Name [unknown]
VG Name centos
PV Size 930.51 GiB / not usable 4.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 238210
Free PE 1
Allocated PE 238209
PV UUID 1D66dK-SyWK-Vm1I-Rgdx-TyA4-tHXB-0LFEGu
--- Physical volume ---
PV Name /dev/sdb1
VG Name centos
PV Size 931.51 GiB / not usable 4.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 238466
Free PE 0
Allocated PE 238466
PV UUID RvJSf5-zrH3-hysf-pQ76-ZQ6U-4lqH-nn8ChC[root@E3-1230-265 ~]# vgdisplay
--- Volume group ---
VG Name rootvg
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size <931.02 GiB
PE Size 4.00 MiB
Total PE 238341
Alloc PE / Size 238341 / <931.02 GiB
Free PE / Size 0 / 0
VG UUID i16vp8-vgWX-xsEm-Zf2V-yYrq-QmFu-dAEgjE
WARNING: Device for PV 1D66dK-SyWK-Vm1I-Rgdx-TyA4-tHXB-0LFEGu not found or rejected by a filter.
--- Volume group ---
VG Name centos
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 4
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 3
Open LV 0
Max PV 0
Cur PV 2
Act PV 1
VG Size <1.82 TiB
PE Size 4.00 MiB
Total PE 476676
Alloc PE / Size 476675 / <1.82 TiB
Free PE / Size 1 / 4.00 MiB
VG UUID mVTKvF-LaJB-hkEl-0h21-lYSB-O3wf-OBRE5G
操作后的一些情况：
[root@E3-1230-265 ~]# pvcreate -ff -y /dev/sdb1
WARNING: Device for PV 1D66dK-SyWK-Vm1I-Rgdx-TyA4-tHXB-0LFEGu not found or rejected by a filter.
Physical volume "/dev/sdb1" successfully created.
[root@E3-1230-265 ~]# vgextend rootvg /dev/sdb1
Volume group "rootvg" successfully extended[root@E3-1230-265 ~]# vgdisplay
--- Volume group ---
VG Name rootvg
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 4
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 2
Act PV 2
VG Size <1.82 TiB
PE Size 4.00 MiB
Total PE 476807
Alloc PE / Size 238341 / <931.02 GiB
Free PE / Size 238466 / <931.51 GiB
VG UUID i16vp8-vgWX-xsEm-Zf2V-yYrq-QmFu-dAEgjE
[root@E3-1230-265 ~]# lvextend -l +238466 /dev/rootvg/rootlv
Size of logical volume rootvg/rootlv changed from <927.02 GiB (237317 extents) to 1.81 TiB (475783 extents).
Logical volume rootvg/rootlv successfully resized.root@E3-1230-265 ~]# xfs_growfs /dev/rootvg/rootlv
meta-data=/dev/mapper/rootvg-rootlv isize=512 agcount=4, agsize=60753152 blks
= sectsz=4096 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=243012608, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=118658, version=2
= sectsz=4096 sunit=1 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 243012608 to 487201792
[root@E3-1230-265 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/rootvg-rootlv 1.9T 1.4G 1.9T 1% /
devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs 7.8G 0 7.8G 0% /dev/shm
tmpfs 7.8G 8.7M 7.8G 1% /run
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
/dev/sda1 494M 138M 357M 28% /boot
tmpfs 1.6G 0 1.6G 0% /run/user/0
[root@E3-1230-265 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 931.5G 0 disk
├─sda1 8:1 0 500M 0 part /boot
└─sda2 8:2 0 931G 0 part
├─rootvg-rootlv 253:0 0 1.8T 0 lvm /
└─rootvg-swaplv 253:1 0 4G 0 lvm [SWAP]
sdb 8:16 0 931.5G 0 disk
└─sdb1 8:17 0 931.5G 0 part
└─rootvg-rootlv 253:0 0 1.8T 0 lvm /
