我一开始有一个 25GB 的硬盘,想把它扩展到 150GB。我曾经将fdisk
/dev/sda2 分区从 26GB 扩展到 149GB。lsblk
显示以下信息:
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 150G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 149G 0 part
├─rhel-root 253:0 0 76G 0 lvm /
└─rhel-swap 253:1 0 3G 0 lvm [SWAP]
sdb 8:16 0 50G 0 disk
└─rhel-root 253:0 0 76G 0 lvm /
sr0 11:0 1 1024M 0 rom
fdisk -l
显示以下输出:
Disk /dev/sdb: 53.7 GB, 53687091200 bytes, 104857600 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
Disk /dev/sda: 161.1 GB, 161061273600 bytes, 314572800 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
Disk label type: dos
Disk identifier: 0x000b0bb3
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 314572799 156236800 83 Linux
Disk /dev/mapper/rhel-root: 81.6 GB, 81595990016 bytes, 159367168 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
Disk /dev/mapper/rhel-swap: 3221 MB, 3221225472 bytes, 6291456 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
我放入了第二个 50GB 磁盘,可以使用vgextend
并将xfs_growfs
其添加到卷组。现在,rhel 卷组为 76GB。但是,我不明白为什么卷组不是 200GB,因为它sda2
是 149GB。结果pvscan
如下:
PV /dev/sda2 VG rhel lvm2 [<29.00 GiB / 0 free]
PV /dev/sdb VG rhel lvm2 [<50.00 GiB / 0 free]
Total: 2 [78.99 GiB] / in use: 2 [78.99 GiB] / in no VG: 0 [0 ]
它显示 /dev/sda2 小于 29.00GB,这让我很惊讶。我原本以为它会是 149G,如 所示lsblk
。我尝试执行vgextend rhel /dev/sda2
,它说物理卷 /dev/sda2 已经在卷组 rhel 中,这是有道理的。我只是不明白为什么df -h
只显示 76GB,而我认为它会是 200GB。以下是 的输出df -h
:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/rhel-root 76G 11G 66G 14% /
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 3.9G 9.0M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/sda1 1014M 217M 798M 22% /boot
tmpfs 783M 0 783M 0% /run/user/1000
tmpfs 783M 0 783M 0% /run/user/0
请告诉我可以采取什么步骤来使 /dev/mapper/rhel-root 达到应有的 200GB。
答案1
尝试使用pvresize
。最终分区大小被调整了,但 lvm 中的物理卷没有被调整。