Linux 磁盘挂载
磁盘挂载
查看现有磁盘大小
df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/rhel-root 48G 5.7G 43G 12% /
devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs 7.8G 0 7.8G 0% /dev/shm
tmpfs 7.8G 457M 7.4G 6% /run
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
/dev/vda1 1014M 163M 852M 17% /boot
/dev/mapper/rhel-home 24G 3.7G 20G 16% /home
tmpfs 1.6G 0 1.6G 0% /run/user/0
tmpfs 1.6G 0 1.6G 0% /run/user/1000
查找未挂载的磁盘信息
fdisk -l
Disk /dev/vda: 85.9 GB, 85899345920 bytes, 167772160 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 label type: dos
Disk identifier: 0x000c4a3e
Device Boot Start End Blocks Id System
/dev/vda1 * 2048 2099199 1048576 83 Linux
/dev/vda2 2099200 167772159 82836480 8e Linux LVM
Disk /dev/vdb: 322.1 GB, 322122547200 bytes, 629145600 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 /dev/mapper/rhel-root: 51.3 GB, 51308920832 bytes, 100212736 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 /dev/mapper/rhel-swap: 8455 MB, 8455716864 bytes, 16515072 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 /dev/mapper/rhel-home: 25.1 GB, 25052577792 bytes, 48930816 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
查看磁盘的格式
dh -T
Filesystem Type 1K-blocks Used Available Use% Mounted on
/dev/mapper/rhel-root xfs 50081904 6030584 44051320 13% /
devtmpfs devtmpfs 8120984 0 8120984 0% /dev
tmpfs tmpfs 8133020 0 8133020 0% /dev/shm
tmpfs tmpfs 8133020 467772 7665248 6% /run
tmpfs tmpfs 8133020 0 8133020 0% /sys/fs/cgroup
/dev/vda1 xfs 1038336 166248 872088 17% /boot
/dev/mapper/rhel-home xfs 24453464 3940144 20513320 17% /home
tmpfs tmpfs 1626604 0 1626604 0% /run/user/0
tmpfs tmpfs 1626604 0 1626604 0% /run/user/1000
tmpfs tmpfs 1626604 0 1626604 0% /run/user/1001
格式化未挂载的磁盘并制定格式
mkfs -t xfs /dev/vdb #此次使用的是而xfs格式
meta-data=/dev/vdb isize=512 agcount=4, agsize=19660800 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0, sparse=0
data = bsize=4096 blocks=78643200, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal log bsize=4096 blocks=38400, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
将磁盘挂载到创建的目录上
mkdir /home/test #创建test文件做为磁盘挂载点
mount /dev/xvdb /home/test
/dev/xvdb：磁盘目录
/home/test:挂载点
实现自动挂载
通过磁盘路径实现自动挂载
vi /etc/fstab
/dev/mapper/centos-root / xfs defaults 0 0
UUID=d622a455-5eef-4e4c-94b6-563feee85995 /boot xfs defaults 0 0
/dev/mapper/centos-home /home xfs defaults 0 0
/dev/mapper/centos-swap swap swap defaults 0 0通过磁盘路径实现挂载
/dev/xvdb /home/text xfs defaults 0 0
通过uuid实现自动挂载
查看磁盘UUID
blkid /dev/sda3
dev/sda3: UUID="e7adfeb9-8749-48cd-90cd-61de56c9af74" TYPE="xfs"
vi /etc/fstab
/dev/mapper/centos-root / xfs defaults 0 0
UUID=d622a455-5eef-4e4c-94b6-563feee85995 /boot xfs defaults 0 0
/dev/mapper/centos-home /home xfs defaults 0 0
/dev/mapper/centos-swap swap swap defaults 0 0通过磁盘路径实现挂载
/dev/xvdb /home/text xfs defaults 0 0
通过uuid挂载
UUID=e7adfeb9-8749-48cd-90cd-61de56c9af74 /home/test xfs defaults 0 0
退出文件后测试
卸载磁盘
umount /dev/sda3
重新加载
mount -a #执行后正常情况下 磁盘会自动挂载上去。
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/rhel-root 48G 5.9G 42G 13% /
devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs 7.8G 0 7.8G 0% /dev/shm
tmpfs 7.8G 457M 7.4G 6% /run
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
/dev/vda1 1014M 163M 852M 17% /boot
/dev/mapper/rhel-home 24G 3.8G 20G 17% /home
tmpfs 1.6G 0 1.6G 0% /run/user/0
tmpfs 1.6G 0 1.6G 0% /run/user/1000
tmpfs 1.6G 0 1.6G 0% /run/user/1001
/dev/vdb 300G 33M 300G 1% /home/jyhpt
