FreeBSD 11 磁盘空间扩容

场景

阿里云买了个60G的系统盘ECS。进去一看只有20G！
原因是：它刷镜像时，只刷了前边的20G。后边的40G，就成了空白。结果交到我手上，就成了个半成品。
只得自己给它扩容

初始状态：

root@log:~ # df -h
Filesystem                     Size    Used   Avail Capacity  Mounted on
/dev/ufsid/59a7effe7885633c     19G    4.1G     14G    23%    /
devfs                          1.0K    1.0K      0B   100%    /dev

第一步：查看

root@log:~ # gpart show
=>       63  125829057  vtbd0  MBR  (60G)
         63          1         - free -  (512B)
         64   41942975      1  freebsd  [active]  (20G)
   41943039   83886081         - free -  (40G)

的确有40G的空白

第二步：重置大小

1 2	root@log:~ # gpart resize -i 1 -a 4k -s 59G vtbd0 vtbd0s1 resized

-i 1 这里的1是抄写 gpart show中vtbd0一栏下当前正使用的磁盘的编号
-s 59G 为什么要丢掉一个G？因为交换分区需要空间。

第三步：执行配置

root@log:~ # service growfs onestart
Growing root partition to fill device
vtbd0s1 resized
super-block backups (for fsck_ffs -b #) at:
 42314112, 43596352, 44878592, 46160832, 47443072, 48725312, 50007552, 51289792, 52572032, 53854272, 55136512, 56418752, 57700992, 58983232, 60265472, 61547712, 62829952,
 64112192, 65394432, 66676672, 67958912, 69241152, 70523392, 71805632, 73087872, 74370112, 75652352, 76934592, 78216832, 79499072, 80781312, 82063552, 83345792, 84628032,
 85910272, 87192512, 88474752, 89756992, 91039232, 92321472, 93603712, 94885952, 96168192, 97450432, 98732672, 100014912, 101297152, 102579392, 103861632, 105143872, 106426112,
 107708352, 108990592, 110272832, 111555072, 112837312, 114119552, 115401792, 116684032, 117966272, 119248512, 120530752, 121812992, 123095232, 124377472, 125659712

完成！并检查

root@log:~ # df -h
Filesystem                     Size    Used   Avail Capacity  Mounted on
/dev/ufsid/59a7effe7885633c     58G    4.2G     49G     8%    /
devfs                          1.0K    1.0K      0B   100%    /dev
root@log:~ # gpart show
=>       63  125829057  vtbd0  MBR  (60G)
         63          1         - free -  (512B)
         64  125829056      1  freebsd  [active]  (60G)