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hncr
Asked: 2020-03-20 23:28:26 +0800 CST

恢复单个磁盘上分区的 pvresize 命令

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当我试图为 / 文​​件系统扩展我的 lvm 时，我犯了一个错误。而且我不确定这是否也是一个错误。
我没有创建新分区并将其添加到 pv、vg 并随后扩展 lv，而是从当前分区的命令“pvresize”开始，该分区正在为根文件系统提供服务。

我执行的命令是：

[root@...]pvresize /dev/sda3 --setphysicalvolumesize 40G

然后我尝试使用以下内容扩展 vg：

 [root@...]# vgextend titan /dev/sda3 
  /dev/sdc: open failed: No medium found
  WARNING: Device /dev/sda3 has size of 58351616 sectors which is smaller than corresponding PV size of 83884032 sectors. Was device resized?
  WARNING: One or more devices used as PVs in VG vg have changed sizes.
  Physical volume '/dev/sda3' is already in volume group 'vg'
  Unable to add physical volume '/dev/sda3' to volume group 'vg'
  /dev/sda3: physical volume not initialized.

在看到上面的输出后，我意识到我必须在我正在操作的单个磁盘上创建另一个分区并将其添加到 pv 组，扩展卷组，然后为根文件系统增加我的逻辑卷。

问题：如何安全地将物理卷大小恢复到我开始的位置，以使有关大小更改的警告消失？

在这里，您可以找到我认为您需要进一步指导解决方案的信息：

[root@...]# lsblk -b
NAME           MAJ:MIN RM          SIZE RO TYPE MOUNTPOINT
sda              8:0    0  480103981056  0 disk 
├─sda1           8:1    0     629145600  0 part /boot/efi
├─sda2           8:2    0    1073741824  0 part /boot
└─sda3           8:3    0   29876027392  0 part 
  ├─lv-root 253:0    0   21474836480  0 lvm  /
  └─lv-swap 253:1    0    8396996608  0 lvm  [SWAP]


[root@t...]# pvdisplay -m -v
    WARNING: Device /dev/sda3 has size of 58351616 sectors which is smaller than corresponding PV size of 83884032 sectors. Was device resized?
  WARNING: One or more devices used as PVs in VG titan have changed sizes.
  --- Physical volume ---
  PV Name               /dev/sda3
  VG Name               vg
  PV Size               <40.00 GiB / not usable 3.00 MiB
  Allocatable           yes 
  PE Size               4.00 MiB
  Total PE              10239
  Free PE               3117
  Allocated PE          7122
  PV UUID               FgC2QI-pRpK-LZNS-di9w-Jc1d-XGXZ-2QxZI2

  --- Physical Segments ---
  Physical extent 0 to 5119:
    Logical volume  /dev/lv/root
    Logical extents 0 to 5119
  Physical extent 5120 to 7121:
    Logical volume  /dev/lv/swap
    Logical extents 0 to 2001
  Physical extent 7122 to 10238:
    FREE
linux lvm

1 个回答

  1. Best Answer

    在互联网上花费时间并且不知道我将要做什么之后，我只是注意到错误本身并教导我可以使用那里提到的确切扇区大小。所以我执行了命令：

    [root@...] pvresize --setphysicalvolumesize 58351616s

    它完美无瑕。

    [root@t...]# pvdisplay
   --- Physical volume ---
  PV Name               /dev/sda3
  VG Name               vg
  PV Size               27.82 GiB / not usable 3.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              7122
  Free PE               0
  Allocated PE          7122
  PV UUID               FgC2QI-pRpK-LZNS-di9w-Jc1d-XGXZ-2QxZI2

  --- Physical volume ---
  PV Name               /dev/sda4
  VG Name               vg
  PV Size               20.00 GiB / not usable 4.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              5119
  Free PE               0
  Allocated PE          5119
  PV UUID               n5CdvZ-0s9A-iZoz-A2i7-icF9-Wv42-CsL3s9
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