昨天看到大家在讨论HH的硬盘不足问题，我自己也使用lsblk命令查了下，显示如下：

[root@hh-sto-500g ~]# lsblk
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sr0     11:0    1   368K  0 rom
vda    252:0    0 465.6G  0 disk
└─vda1 252:1    0 465.6G  0 part /

可以看到，硬盘显示465.6G，然后我提交了工单，准备问下是不是给少了，Mike W回复如下：

Hi,
Please search "TB to TiB" on google for more information. You purchased 2TB, not 2TiB.

后来经过一番搜索，发现df命令查询出来的单位是GiB，HH套餐写的是500GB，通过https://www.gbmb.org/gb-to-gib网址换算：

500 GB = 465.661287308 GiB 
2 TB = 1.818989404 TiB

GB是按1000换算
GiB是按1024换算

网上再次搜索一番后，发现这个命令可以查询

fdisk -l |grep Disk

[root@hh-sto-500g ~]# fdisk -l |grep Disk
Disk /dev/ram0: 16 MB, 16777216 bytes, 32768 sectors
Disk /dev/ram1: 16 MB, 16777216 bytes, 32768 sectors
Disk /dev/ram2: 16 MB, 16777216 bytes, 32768 sectors
Disk /dev/ram3: 16 MB, 16777216 bytes, 32768 sectors
Disk /dev/ram4: 16 MB, 16777216 bytes, 32768 sectors
Disk /dev/ram5: 16 MB, 16777216 bytes, 32768 sectors
Disk /dev/ram6: 16 MB, 16777216 bytes, 32768 sectors
Disk /dev/ram7: 16 MB, 16777216 bytes, 32768 sectors
Disk /dev/ram8: 16 MB, 16777216 bytes, 32768 sectors
Disk /dev/ram9: 16 MB, 16777216 bytes, 32768 sectors
Disk /dev/ram10: 16 MB, 16777216 bytes, 32768 sectors
Disk /dev/ram11: 16 MB, 16777216 bytes, 32768 sectors
Disk /dev/ram12: 16 MB, 16777216 bytes, 32768 sectors
Disk /dev/ram13: 16 MB, 16777216 bytes, 32768 sectors
Disk /dev/ram14: 16 MB, 16777216 bytes, 32768 sectors
Disk /dev/ram15: 16 MB, 16777216 bytes, 32768 sectors
Disk /dev/vda: 499.9 GB, 499893927936 bytes, 976355328 sectors
Disk label type: dos
Disk identifier: 0x000b050e

本人才疏学浅，以上如有错误请大家指正，共同学习。
参考文献：https://blog.51cto.com/shijianfeng/2914788