linux下添加逻辑分区并挂载（手动和自动方式）

Posted 2020-10-31 wwfy

一、查看新磁盘
[[email protected] Desktop]# fdisk -cul /dev/sdc

Disk /dev/sdc: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders, total 41943040 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 identifier: 0x00000000
二添加逻辑分区
[[email protected] Desktop]# fdisk -cu /dev/sdc
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x740491c5.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won‘t be recoverable.


Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)


Command (m for help): m
Command action
a toggle a bootable flag
b edit bsd disklabel
c toggle the dos compatibility flag
d delete a partition
l list known partition types
m print this menu
n add a new partition
o create a new empty DOS partition table
p print the partition table
q quit without saving changes
s create a new empty Sun disklabel
t change a partition‘s system id
u change display/entry units
v verify the partition table
w write table to disk and exit
x extra functionality (experts only)


Command (m for help): n
Command action
e extended
p primary partition (1-4)
e---------------〉选择扩展分区
Partition number (1-4): 2
First sector (2048-41943039, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-41943039, default 41943039): 10G
Value out of range.
Last sector, +sectors or +size{K,M,G} (2048-41943039, default 41943039): +10G


Command (m for help): N
Command action
l logical (5 or over)
p primary partition (1-4)
L-----------------〉选择逻辑分区
First sector (4096-20973567, default 4096):
Using default value 4096
Last sector, +sectors or +size{K,M,G} (4096-20973567, default 20973567): +5G


Command (m for help): N
Command action
l logical (5 or over)
p primary partition (1-4)
L-------------------〉选择逻辑分区
First sector (10491904-20973567, default 10491904):
Using default value 10491904
Last sector, +sectors or +size{K,M,G} (10491904-20973567, default 20973567): +5G
Value out of range.
Last sector, +sectors or +size{K,M,G} (10491904-20973567, default 20973567):
Using default value 20973567


Command (m for help): P--------------->打印分区列表


Disk /dev/sdc: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders, total 41943040 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 identifier: 0x740491c5


Device Boot Start End Blocks Id System
/dev/sdc2 2048 20973567 10485760 5 Extended
/dev/sdc5 4096 10489855 5242880 83 Linux
/dev/sdc6 10491904 20973566 5240831+ 83 Linux
自动命名逻辑分区为：sdc5 sdc6
Command (m for help): w------------------>保存退出
The partition table has been altered!


Calling ioctl() to re-read partition table.
Syncing disks.
[[email protected] Desktop]# part
parted partprobe partx
[[email protected] Desktop]# partx -a /dev/sdc
BLKPG: Device or resource busy
error adding partition 2
BLKPG: Device or resource busy
error adding partition 5
BLKPG: Device or resource busy
error adding partition 6
三、查看新分区
[[email protected] Desktop]# fdisk -cu /dev/sdc


Command (m for help): p


Disk /dev/sdc: 21.5 GB, 21474836480 bytes
139 heads, 49 sectors/track, 6158 cylinders, total 41943040 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 identifier: 0x740491c5


Device Boot Start End Blocks Id System
/dev/sdc2 2048 20973567 10485760 5 Extended
/dev/sdc5 4096 10489855 5242880 83 Linux
/dev/sdc6 10491904 20973566 5240831+ 83 Linux


Command (m for help): q
四、格式化分区
1sdc5
[[email protected] Desktop]# mkfs.ext4 /dev/sdc5
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
327680 inodes, 1310720 blocks
65536 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=1342177280
40 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


Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done


This filesystem will be automatically checked every 38 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
2sdc6
[[email protected] Desktop]# mkfs.ext4 /dev/sdc6
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
327680 inodes, 1310207 blocks
65510 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=1342177280
40 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


Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done


This filesystem will be automatically checked every 30 mounts or
180 days, whichever comes first. Use tune2fs -c or -i to override.
五、新建挂载目录
[[email protected] Desktop]# cd /mnt/
[[email protected] mnt]# ls
hgfs
[[email protected] mnt]# mkdir sdc{5,6}
[[email protected] mnt]# ls
hgfs sdc5 sdc6
[[email protected] mnt]# pwd
/mnt
六、分别自动挂载sdc5、sdc6到/mnt/sdc5 、 /mnt/sdc6
[[email protected] mnt]# mount /dev/sdc5 /mnt/sdc5
[[email protected]61 mnt]# mount /dev/sdc6 /mnt/sdc6
七、查可挂载是否成功
[[email protected] mnt]# mount
/dev/mapper/vol0-root on / type ext4 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0")
/dev/sda1 on /boot type ext4 (rw)
/dev/mapper/vol0-home on /home type ext4 (rw)
/dev/sdb5 on /tmp/sdb5 type ext4 (rw)
/dev/sdb6 on /tmp/sdb6 type ext4 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
vmware-vmblock on /var/run/vmblock-fuse type fuse.vmware-vmblock (rw,nosuid,nodev,default_permissions,allow_other)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
gvfs-fuse-daemon on /root/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev)
/dev/sdc5 on /mnt/sdc5 type ext4 (rw)
/dev/sdc6 on /mnt/sdc6 type ext4 (rw)
九、卸载sdc5 sdc6
[[email protected] mnt]# umount /dev/sdc5
[[email protected] mnt]# umount /dev/sdc6
[[email protected] mnt]# mount
/dev/mapper/vol0-root on / type ext4 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0")
/dev/sda1 on /boot type ext4 (rw)
/dev/mapper/vol0-home on /home type ext4 (rw)
/dev/sdb5 on /tmp/sdb5 type ext4 (rw)
/dev/sdb6 on /tmp/sdb6 type ext4 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
vmware-vmblock on /var/run/vmblock-fuse type fuse.vmware-vmblock (rw,nosuid,nodev,default_permissions,allow_other)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
gvfs-fuse-daemon on /root/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev)
十、手工挂载
1、查看sdb5的UUID
[[email protected] mnt]#blkid /dev/sdb5
2、手工挂载sdb5、sdb6
[[email protected] mnt]# cd /etc
[[email protected] etc]# vi fstab


#
# /etc/fstab
# Created by anaconda on Fri Apr 11 00:49:26 2014
#
# Accessible filesystems, by reference, are maintained under ‘/dev/disk‘
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/vol0-root / ext4 defaults 1 1
UUID=9353a628-e49f-4675-abf4-b0fe76b38fbc /boot ext4 defaults 1 2
/dev/mapper/vol0-home /home ext4 defaults 1 2
UUID=f3d4a81c-f2d6-48d8-be1a-35647cd74615 swap swap defaults 0 0
tmpfs /dev/shm tmpfs defaults 0 0
devpts /dev/pts devpts gid=5,mode=620 0 0
sysfs /sys sysfs defaults 0 0
proc /proc proc defaults 0 0
UUID=dfa6e086-e5be-4856-9e8d-9565d52b82e6 /mnt/sdc5 ext4 defaults 0 0
/dev/sdc6 /mnt/sdc6 ext4 defaults 0 0
方式有通过分区名和UUID
十一、查看挂载结果
[[email protected] etc]# mount -a------------------〉刷新mount
[[email protected] etc]# mount
/dev/mapper/vol0-root on / type ext4 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0")
/dev/sda1 on /boot type ext4 (rw)
/dev/mapper/vol0-home on /home type ext4 (rw)
/dev/sdb5 on /tmp/sdb5 type ext4 (rw)
/dev/sdb6 on /tmp/sdb6 type ext4 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
vmware-vmblock on /var/run/vmblock-fuse type fuse.vmware-vmblock (rw,nosuid,nodev,default_permissions,allow_other)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
gvfs-fuse-daemon on /root/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev)
/dev/sdc5 on /mnt/sdc5 type ext4 (rw)
/dev/sdc6 on /mnt/sdc6 type ext4 (rw)
[[email protected] etc]#