我在 Debian buster 系统上作为 KVM/libvirt 主机工作，并按照本指南扩展了我的客户的磁盘：https://computingforgeeks.com/how-to-extend-increase-kvm-virtual-machine-disk-size/。
当将 kvm/libvirt 客户机的磁盘从 50G 扩展到 200G 时，重新启动客户机后出现错误：
WARNING: Device /dev/sda5 has size of 103854080 sectors which is smaller than corresponding PV size of 418426880 sectors. Was device resized?
重启之前我做的最后一件事是在扩展 PV 之后调整 LV 的大小。
我原本希望能够调整分区大小，然后调整文件系统的大小，但事实并非如此。我猜 LVM 对其大小感到困惑。我如何让它更新不同容器（物理卷、逻辑卷、卷组、分区）的大小信息？
这是我得到的诊断输出：
pvs
WARNING: Device /dev/sda5 has size of 103854080 sectors which is smaller than corresponding PV size of 418426880 sectors. Was device resized?
One or more devices used as PVs in VG cosa-cloud-vg have changed sizes.
PV VG Fmt Attr PSize PFree
/dev/sda5 cosa-cloud-vg lvm2 a-- <199.52g 5.00g
vgs
WARNING: Device /dev/sda5 has size of 103854080 sectors which is smaller than corresponding PV size of 418426880 sectors. Was device resized?
One or more devices used as PVs in VG cosa-cloud-vg have changed sizes.
VG #PV #LV #SN Attr VSize VFree
cosa-cloud-vg 1 2 0 wz--n- <199.52g 5.00g
lvs
WARNING: Device /dev/sda5 has size of 103854080 sectors which is smaller than corresponding PV size of 418426880 sectors. Was device resized?
One or more devices used as PVs in VG cosa-cloud-vg have changed sizes.
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
root cosa-cloud-vg -wi------- 193.56g
swap_1 cosa-cloud-vg -wi-a----- 980.00m
fdisk -l
Disk /dev/sda: 200 GiB, 214748364800 bytes, 419430400 sectors
Disk model: QEMU HARDDISK
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xf64fd2c9
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 999423 997376 487M 83 Linux
/dev/sda2 1001470 104855551 103854082 49.5G 5 Extended
/dev/sda5 1001472 104855551 103854080 49.5G 8e Linux LVM
Disk /dev/sdb: 4 GiB, 4294967296 bytes, 8388608 sectors
Disk model: QEMU HARDDISK
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/cosa--cloud--vg-swap_1: 980 MiB, 1027604480 bytes, 2007040 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
(parted) print
Model: QEMU QEMU HARDDISK (scsi)
Disk /dev/sda: 419430400s
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
1 2048s 999423s 997376s primary ext2 boot
2 1001470s 104855551s 103854082s extended
5 1001472s 104855551s 103854080s logical lvm
注意 fdisk 和 parted 在磁盘大小方面的差异（200G vs 215G）。不确定那是什么意思。