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恢复单个磁盘上分区的 pvresize 命令

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恢复单个磁盘上分区的 pvresize 命令

当我尝试扩展 / 文件系统的 lvm 时，我犯了一个错误。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，然后扩展 lv，而是从为根文件系统提供服务的当前分区开始使用命令“pvresize”。

我执行的命令是：

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

然后我尝试使用以下命令扩展 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.

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时的点，以使有关大小变化的警告消失？

您可以在这里找到我认为您需要的进一步解决方案指导的信息：

[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

答案1

在互联网上花了很多时间却不知道该怎么做之后，我才注意到错误本身，并被告知我可以使用上面提到的确切扇区大小。所以我执行了命令：

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

并且它运行完美。

[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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