我的简书

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[root@centos-linux-03 dev]# pvs
  PV         VG     Fmt  Attr PSize   PFree
  /dev/sda2  centos lvm2 a--  <63.00g 4.00m
[root@centos-linux-03 dev]# pvcreate /dev/sdb /dev/sdc
  Physical volume "/dev/sdb" successfully created.
  Physical volume "/dev/sdc" successfully created.
[root@centos-linux-03 dev]# pvs
  PV         VG     Fmt  Attr PSize   PFree  
  /dev/sda2  centos lvm2 a--  <63.00g   4.00m
  /dev/sdb          lvm2 ---  102.00m 102.00m
  /dev/sdc          lvm2 ---  102.00m 102.00m
  
[root@centos-linux-03 dev]# vgs
  VG     #PV #LV #SN Attr   VSize   VFree
  centos   1   3   0 wz--n- <63.00g 4.00m
[root@centos-linux-03 dev]# vgcreate lnlvm /dev/sdb /dev/sdc
  Volume group "lnlvm" successfully created
[root@centos-linux-03 dev]# vgs
  VG     #PV #LV #SN Attr   VSize   VFree  
  centos   1   3   0 wz--n- <63.00g   4.00m
  lnlvm    2   0   0 wz--n- 200.00m 200.00m
  
[root@centos-linux-03 dev]# lvs
  LV   VG     Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  home centos -wi-ao---- <20.01g                                                    
  root centos -wi-ao----  40.98g                                                    
  swap centos -wi-ao----   2.00g                                                    
[root@centos-linux-03 dev]# lvcreate -n lna -L 50M lnlvm 
  Rounding up size to full physical extent 52.00 MiB
WARNING: xfs signature detected on /dev/lnlvm/lna at offset 0. Wipe it? [y/n]: y
  Wiping xfs signature on /dev/lnlvm/lna.
  Logical volume "lna" created.
[root@centos-linux-03 dev]# lvs
  LV   VG     Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  home centos -wi-ao---- <20.01g                                                    
  root centos -wi-ao----  40.98g                                                    
  swap centos -wi-ao----   2.00g                                                    
  lna  lnlvm  -wi-a-----  52.00m  
  
  [root@centos-linux-03 dev]# mkfs.xfs /dev/lnlvm/lna 
meta-data=/dev/lnlvm/lna         isize=512    agcount=2, agsize=6656 blks
         =                       sectsz=4096  attr=2, projid32bit=1
         =                       crc=1        finobt=0, sparse=0
data     =                       bsize=4096   blocks=13312, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal log           bsize=4096   blocks=1605, version=2
         =                       sectsz=4096  sunit=1 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0

[root@centos-linux-03 dev]# mkdir /liu && mount /dev/lnlvm/lna /liu