Linux的磁盘分区

大于2T分区

Linux-GCAPP1:/ # parted /dev/sdb

GNU Parted 2.3

Using /dev/sdb

Welcome to GNU Parted! Type 'help' to view a list of commands.

(parted) mklabel gpt                                                     

(parted) print                                                           

Model: DGC VRAID (scsi)

Disk /dev/sdb: 2199GB

Sector size (logical/physical): 512B/512B

Partition Table: gpt

Number  Start  End  Size  File system  Name  Flags

(parted) mkpart primary 0 2199GB                                         

Warning: The resulting partition is not properly aligned for best performance.

Ignore/Cancel? Ignore                                                     

(parted) print                                                           

Model: DGC VRAID (scsi)

Disk /dev/sdb: 2199GB

Sector size (logical/physical): 512B/512B

Partition Table: gpt

Number  Start   End     Size    File system  Name     Flags

 1      17.4kB  2199GB  2199GB               primary

(parted) quit                                                            

Information: You may need to update /etc/fstab.                          

linux-GCAPP1:/ # ll /dev |grep sdb

brw-rw----  1 root disk      8,  16 Jan  6 17:58 sdb

brw-rw----  1 root disk      8,  17 Jan  6 17:58 sdb1

linux-GCAPP1:/ # mkfs.ext3  /dev/sdb1

小于2T分区

linux-GCAPP1:~ # fdisk /dev/sdc

Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel

Building a new DOS disklabel with disk identifier 0x6353d1d5.

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): n

Command action

   e   extended

   p   primary partition (1-4)

p

Partition number (1-4, default 1):

Using default value 1

First sector (2048-1677721599, default 2048):

Using default value 2048

Last sector, +sectors or +size{K,M,G} (2048-1677721599, default 1677721599):

Using default value 1677721599

Command (m for help): w

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

linux-GCAPP1:~ # ll /dev |grep sdc

brw-rw----  1 root disk      8,  32 Jan  6 18:04 sdc

brw-rw----  1 root disk      8,  33 Jan  6 18:04 sdc1

linux-GCAPP1:~ # mkfs.ext3  /dev/sdc1

mke2fs 1.41.9 (22-Aug-2009)

Filesystem label=

OS type: Linux

Block size=4096 (log=2)

Fragment size=4096 (log=2)

52428800 inodes, 209714944 blocks

10485747 blocks (5.00%) reserved for the super user

First data block=0

Maximum filesystem blocks=4294967296

6400 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, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,

        102400000

Writing inode tables: done                            

Creating journal (32768 blocks): done

Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 32 mounts or

实战中的应用

1、空间的划分(在A机器上操作)
①确认存储设备：
通过fdisk –l可以查看，服务器硬件工程师会提供设备的命名如：/dev/sddlmaa
②分区：
存储空间在2T以下使用fdisk，2T以上使用parted
sjck-1:~ # parted /dev/sddlmaa
GNU Parted 2.3
Using /dev/sddlmaa
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mklabel gpt
Warning: The existing disk label on /dev/sddlmaa will be destroyed and all data
on this disk will be lost. Do you want to continue?
Yes/No? yes
(parted) mkpart primary 0 204800
Warning: The resulting partition is not properly aligned for best performance.
Ignore/Cancel? Ignore
(parted) mkpart primary  204800 3276800
(parted) mkpart primary  3276800 5324800
(parted)  quit
mkfs.ext3  /dev/sddlmaa1
mkfs.ext3  /dev/sddlmaa2
mkfs.ext3  /dev/sddlmaa3

③重启A机器
④创建目录/mysqldb 、/dbdata、/dbdatabk
mkdir /mysqldb
mkdir /dbdata
mkdir /dbdatabk
⑤磁盘挂载
mount /dev/sddlmaa1  /mysqldb
mount /dev/sddlmaa2  /dbdata
mount /dev/sddlmaa3  /dbdatabk
查看挂载情况：df –h
/dev/sddlmaa1   188G  799M  178G   1% /mysqldb
/dev/sddlmaa2   2.8T  253G  2.4T  10% /dbdata
/dev/sddlmaa3   1.9T  7.5G  1.8T   1% /dbdatabk
⑥卸载存储挂载
umount /mysqldb
umount  /dbdata
umount  /dbdatabk
查看挂载是否卸载：df –h
不会出现挂载信息

2、B机器设置
①创建目录/mysqldb 、/dbdata、/dbdatabk
mkdir /mysqldb
mkdir /dbdata
mkdir /dbdatabk
②磁盘挂载
mount /dev/sddlmaa1  /mysqldb
mount /dev/sddlmaa2  /dbdata
mount /dev/sddlmaa3  /dbdatabk
查看挂载情况：df –h
/dev/sddlmaa1   188G  799M  178G   1% /mysqldb
/dev/sddlmaa2   2.8T  253G  2.4T  10% /dbdata
/dev/sddlmaa3   1.9T  7.5G  1.8T   1% /dbdatabk
③卸载存储挂载
umount /mysqldb
umount  /dbdata
umount  /dbdatabk
查看挂载是否卸载：df –h
不会出现挂载信息