[root@RHEL7 ~]# fdisk /dev/sdb
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): p
Disk /dev/sdb: 5368 MB, 5368709120 bytes, 10485760 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: 0x2fa2fc5f
Device Boot Start End Blocks Id System
/dev/sdb1 2048 10485759 5241856 83 Linux
Command (m for help): d
Selected partition 1
Partition 1 is deleted
Command (m for help): p
Disk /dev/sdb: 5368 MB, 5368709120 bytes, 10485760 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: 0x2fa2fc5f
Device Boot Start End Blocks Id System
Command (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
First sector (2048-10485759, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-10485759, default 10485759): +500MB
Partition 1 of type Linux and of size 477 MiB is set
Command (m for help): p
Disk /dev/sdb: 5368 MB, 5368709120 bytes, 10485760 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: 0x2fa2fc5f
Device Boot Start End Blocks Id System
/dev/sdb1 2048 978943 488448 83 Linux
Command (m for help): n
Partition type:
p primary (1 primary, 0 extended, 3 free)
e extended
Select (default p): p
Partition number (2-4, default 2):
First sector (978944-10485759, default 978944):
Using default value 978944
Last sector, +sectors or +size{K,M,G} (978944-10485759, default 10485759): +100MB
Partition 2 of type Linux and of size 95 MiB is set
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
[root@RHEL7 ~]# mkfs.xfs -f /dev/sdb1
meta-data=/dev/sdb1 isize=256 agcount=4, agsize=30528 blks
= sectsz=512 attr=2, projid32bit=1
= crc=0
data = bsize=4096 blocks=122112, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=0
log =internal log bsize=4096 blocks=853, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
[root@RHEL7 ~]# mkfs.ext4 /dev/sdb2
[root@RHEL7 ~]# mkdir /sdb1
[root@RHEL7 ~]# mkdir /sdb2
[root@RHEL7 ~]# mount /dev/sdb1 /sdb1
[root@RHEL7 ~]# mount /dev/sdb2 /sdb2
[root@RHEL7 ~]# mount
/dev/sdb1 on /sdb1 type xfs (rw,relatime,seclabel,attr2,inode64,noquota)
/dev/sdb2 on /sdb2 type ext4 (rw,relatime,seclabel,data=ordered)
[root@RHEL7 ~]# df | tail -2
/dev/sdb1 485036 24580 460456 6% /sdb1
/dev/sdb2 90099 1550 81740 2% /sdb2
设备开机自动挂载
[root@RHEL7 ~]# vim /etc/fstab
/dev/sdb1 /sdb1 xfs defaults 0 0
/dev/sdb2 /sdb2 ext4 defaults 0 0
重新挂载所有分区
[root@RHEL7 ~]# mount -a
使用UUID实现 自动挂载
查看分区的UUID
[root@RHEL7 ~]# blkid /dev/sdb1
/dev/sdb1: UUID="58972903-1d37-4acf-a108-d7221f08e1af" TYPE="xfs"
[root@RHEL7 ~]# blkid /dev/sdb2
/dev/sdb2: UUID="46adcd74-5806-45de-8006-a893c548c9d4" TYPE="ext4"
将/dev/sdb1,/dev/sdb2设备名称使用uuid号替代
[root@RHEL7 ~]# vim /etc/fstab
UUID=58972903-1d37-4acf-a108-d7221f08e1af /sdb1 xfs defaults 0 0
UUID=46adcd74-5806-45de-8006-a893c548c9d4 /sdb2 ext4 defaults 0 0
再重新挂载
[root@RHEL7 ~]# mount -a
卸载挂载点
[root@RHEL7 ~]# umount /sdb1
[root@RHEL7 ~]# umount /sdb2
大于2TB以上的分区 使用parted分区
GPT：全局唯一标识分区表，Gpt对分区数量没有限制
查看是否安装了parted
[root@RHEL7 ~]# rpm -qf `which parted`
parted-3.1-17.el7.x86_64
[root@RHEL7 ~]# rpm -qa | grep parted
pyparted-3.9-7.el7.x86_64
parted-3.1-17.el7.x86_64
查看分区状态
[root@RHEL7 ~]# parted -l
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sda: 21.5GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
1 1049kB 211MB 210MB primary xfs boot
2 211MB 11.8GB 11.5GB primary lvm
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sdb: 5369MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
1 1049kB 501MB 500MB primary xfs
2 501MB 601MB 99.6MB primary ext4
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/rhel-swap: 1049MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags:
Number Start End Size File system Flags
1 0.00B 1049MB 1049MB linux-swap(v1)
Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/rhel-root: 10.5GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags:
Number Start End Size File system Flags
1 0.00B 10.5GB 10.5GB xfs
Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0
has been opened read-only.
Model: NECVMWar VMware SATA CD01 (scsi)
Disk /dev/sr0: 3743MB
Sector size (logical/physical): 2048B/2048B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
2 1123MB 1149MB 25.7MB primary
[root@RHEL7 ~]# parted /dev/sdb
GNU Parted 3.1
Using /dev/sdb
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sdb: 5369MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
1 1049kB 501MB 500MB primary xfs
2 501MB 601MB 99.6MB primary ext4
(parted) rm 2
[root@RHEL7 ~]# parted /dev/sdb
GNU Parted 3.1
Using /dev/sdb
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sdb: 5369MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
1 1049kB 501MB 500MB primary xfs
(parted) rm 1
(parted) print
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sdb: 5369MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
(parted) mklabel gpt
Warning: The existing disk label on /dev/sdb will be destroyed and all
data on this disk will be lost. Do you want to continue?
Yes/No? yes
(parted) print
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sdb: 5369MB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
(parted) mkpart primary 0 1000
Warning: The resulting partition is not properly aligned for best
performance.
Ignore/Cancel? ignore
(parted) print
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sdb: 5369MB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 17.4kB 1000MB 1000MB primary
(parted) mkpart primary 1000 2000
(parted) print
Model: VMware, VMware Virtual S (scsi)
Disk /dev/sdb: 5369MB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 17.4kB 1000MB 1000MB primary
2 1000MB 2000MB 999MB primary
(parted) q
Information: You may need to update /etc/fstab.
扩展SWAP分区
[root@RHEL7 ~]# ls /dev/sdb*
/dev/sdb /dev/sdb1
[root@RHEL7 ~]# mkswap /dev/sdb1
mkswap: /dev/sdb1: warning: wiping old xfs signature.
Setting up swapspace version 1, size = 195580 KiB
no label, UUID=8b9719da-bd1c-487c-8346-4b9d2b7eb082
[root@RHEL7 ~]# swapon /dev/sdb1
[root@RHEL7 ~]# free -m
total used free shared buffers cached
Mem: 1826 1132 694 10 1 434
-/+ buffers/cache: 696 1129
Swap: 1190 0 1190
[root@RHEL7 ~]# swapoff /dev/sdb1
本文转自 OpenStack2015 博客，原文链接： http://blog.51cto.com/andyliu/1839031 如需转载请自行联系原作者
