Three-step operation of centos7 hard disk (partition, format, mount)
One: partition using fdisk partition MBR format using parted partition GPT format fdisk commonly used commands n (new): create new partition d (delete): delete existing partition t (type): modify partition type l (list): view all supported types p (print): display existing partition information W (write): save and exit Q (quit): do not save and exit 1. View hard disk partition information # fdisk-L2. Use fdisk to specify the new hard disk format (/ dev/sdb), MBR format hard disk can only have up to 4 primary partitions # fdisk / dev/sdb 2.1. Create the primary partition [cqs@centos7 ~] $sudo fdisk / dev/sdb Welcome to fdisk (util-linux 2.23.2). The changes remain in memory until you decide to write them to disk. Think twice before using the write command.
Command (enter m for help): n
Partition type:
P primary (0 primary, 0 extended, 4 free)
E extended
Select (default p): P
Partition number (1-4, default 1): 1
Start sector (2048-104857599, default is 2048):
The default value of 2048 will be used
Last sector, + sector or + size {K Magne M Magi G} (2048-104857599, default is 104857599): + 25G
Partition 1 has been set to type Linux and the size is set to 25 GiB
Command (enter m for help): P
Disk / dev/sdb:53.7 GB, 53687091200 bytes, 104857600 sectors
Units = sector of 1 * 512 = 512 bytes
Sector size (logical / physical): 512 bytes / 512 bytes
Igamo size (minimum / best): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x8c7d553d
Device Boot Start End Blocks Id System
/ dev/sdb1 2048 52430847 26214400 83 Linux
2.2 create an extended partition
Command (enter m for help): n
Partition type: P primary (1 primary, 0 extended, 3 free) e extended
Select (default p): e
Partition number (2-4, default 2): start sector (52430848-104857599, default is 52430848): the default value 52430848Last sector will be used, + sector or + size {K Magne M ·G} (52430848-104857599, default is 104857599): will use the default value 104857599 partition 2 has been set to Extended type and the size is set to 25 GiB
Command (enter m for help): P
Disk / dev/sdb:53.7 GB, 53687091200 bytes, 104857600 sector Units = sector of 1 * 512 = 512bytes sector size (logical / physical): 512byte / 512byte I size O (min / best): 512byte / 512byte disk label type: dos disk identifier: 0x8c7d553d device Boot Start End Blocks Id System/dev/sdb1 2048 52430847 26214400 83 Linux
/ dev/sdb2 52430848 104857599 26213376 5 Extended
2.3 create logical Partition command (enter m for help): n
Partition type:
P primary (1 primary, 1 extended, 2 free)
L logical (numbered from 5)
Select (default p): l
Add logical Partition 5
Start sector (52432896-104857599, default is 52432896):
The default value of 52432896 will be used
Last sector, + sector or + size {K _ Magne _ M _ G} (52432896-104857599, default is 104857599):
The default value of 104857599 will be used
Partition 5 has been set to type Linux and the size is set to 25 GiB
Command (enter m for help): P
Disk / dev/sdb:53.7 GB, 53687091200 bytes, 104857600 sectors
Units = sector of 1 * 512 = 512 bytes
Sector size (logical / physical): 512 bytes / 512 bytes
Igamo size (minimum / best): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x8c7d553d
Device Boot Start End Blocks Id System/dev/sdb1 2048 52430847 26214400 83 Linux/dev/sdb2 52430848 104857599 26213376 5 Extended/dev/sdb5 52432896 104857599 26212352 83 Linux command (enter m for help): W
The partition table has been altered!
Calling ioctl () to re-read partition table.
Synchronizing disks.
Note: finally, you must save and exit (w), otherwise the partition will become invalid.
Two: formatting
Format the hard disk as ext4 [cqs@centos7 ~] $sudo mkfs.ext4 / dev/sdb1
Mke2fs 1.42.9 (28-Dec-2013)
File system label =
OS type: Linux
Block size = 4096 (log=2)
Chunk size = 4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
1638400 inodes, 6553600 blocks
327680 blocks (5.00%) reserved for the super user
First data block = 0
Maximum filesystem blocks=2155872256
200 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208
4096000
Allocating group tables: done
Writing inode table: complete
Creating journal (32768 blocks): complete
Writing superblocks and filesystem accounting information: done
Three: mounting
1. Create a new mount point [cqs@centos7 ~] $mkdir-p / home/cqs/data [cqs@centos7 ~] $mkdir-p / home/cqs/soft2. Select a partition to the specified mount point (temporarily mounted, it will fail after the machine is rebooted) [cqs@centos7 ~] $sudo mount / dev/sdb1 / home/cqs/data [cqs@centos7 ~] $sudo mount / dev/sdb5 / home/cqs/soft to check whether the hard disk can use [cqs@centos7 ~] $df
File system 1K-Block used available used% mount point
/ dev/sda3 18555904 13630632 4925272 74%
Devtmpfs 747064 0 747064 / dev
Tmpfs 763176 0 763176 / dev/shm
Tmpfs 763176 10828 752348 2% / run
Tmpfs 763176 0 763176 / sys/fs/cgroup
/ dev/sda1 303788 229948 73840 76% / boot
Tmpfs 152636 8 152628 1% / run/user/42
Tmpfs 152636 32 152604 1% / run/user/1001
Tmpfs 152636 0 152636 / run/user/0
/ dev/sdb1 25671908 45080 24299724 1% / home/cqs/data
/ dev/sdb5 25669860 45080 24297780 1% / home/cqs/soft
Check whether the mount point is successful [cqs@centos7 ~] $mount | grep "sdb" / dev/sdb1 on / home/cqs/data type ext4 (rw,relatime,seclabel,data=ordered) / dev/sdb5 on / home/cqs/soft type ext4 (rw,relatime,seclabel,data=ordered)
Test the mount point for errors
# mount-a
Don't restart yet, use mount-a to test whether it can be mounted properly and then restart.
Take effect permanently
# echo "/ dev/sdb1 / home/cqs/data ext4 defaults 0" > > / etc/fstab
# echo "/ dev/sdb5 / home/cqs/soft ext4 defaults 0" > > / etc/fstab
