Linux 挂载2T以上存储

Posted 2020-06-10

在生产环境中，我们会遇到分区大于2T的磁盘（比如：添加一个3TB的存储），由于MBR分区表只支持2T磁盘，所以大于2T的磁盘必须使用GPT分区表

而fdisk是不支持GPT分区的，我们可以使用parted来对GPT磁盘操作。parted功能很强大，既可用命令行也可以用于交互式，在提示符下输入parted就会进入交互式模式,如果有多个磁盘的话，我们需要运行select sdX（X为磁盘）来进行磁盘的选择，也可直接用parted /dev/sdX指定相应的硬盘

查看磁盘信息：
[[email protected] ~]# fdisk -l

Disk /dev/sdm: 299.4 GB, 299439751168 bytes
255 heads, 63 sectors/track, 36404 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x2ebc66f6

Device Boot Start End Blocks Id System
/dev/sdm1 1 2089 16777216 82 Linux swap / Solaris
/dev/sdm2 * 2089 36405 275643392 83 Linux

Disk /dev/sdn: 3200.0 GB, 3199999672320 bytes
255 heads, 63 sectors/track, 389044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

[[email protected] ~]# parted
GNU Parted 2.1
浣跨敤 /dev/sda
Welcome to GNU Parted! Type ‘help‘ to view a list of commands.
(parted)

(parted) select /dev/sdn //选择磁盘sdn
浣跨敤 /dev/sdn

(parted) mklabel gpt //将MBR磁盘格式化为GPT

(parted) mkpart primary 0 -1 //将整块磁盘分成一个分区

(parted) quit //退出

[[email protected] ~]# mkfs.ext4 /dev/sdn1 //格式化
mke2fs 1.41.12 (17-May-2010)
Discarding device blocks: 20447232/454545159

[[email protected] ~]# mkdir /io

[[email protected] ~]# mount /dev/sdn1 /io //挂载

[[email protected] ~]# blkid /dev/sdn1
/dev/sdn1: UUID="5abd6300-8375-4310-b1b5-5daf8576d6ff" TYPE="ext4"

[[email protected] ~]# vi /etc/fstab

UUID=5abd6300-8375-4310-b1b5-5daf8576d6ff /io ext4 defaults 1 2

[[email protected] ~]# df -h
/dev/sdn1 2.9T 200M 2.8T 1% /io