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  • 分区管理工具-gdisk命令实战案例

              分区管理工具-gdisk命令实战案例

                                  作者:尹正杰 

    版权声明:原创作品,谢绝转载!否则将追究法律责任。

     

      gdisk工具擅长管理GPT分区。接下来我们就简单介绍一下该工具的使用。

    一.分区表概述

      博主推荐阅读:
        https://www.cnblogs.com/yinzhengjie/p/12347792.html

    二.安装gdisk

      gdisk工具和fdisk很类似,都是对磁盘进行分区管理的开源工具。如下图所示,fdisk对于GPT分区方式目前只是实验性的,因此生成环境建议大家谨慎使用。
    
      我们的gdisk工具很擅长处理GPT分区方式,不仅如此还支持MBR以及APM和BSD分区方式(虽说后两者分区方式使用相对较少,感兴趣的同学可以自行查阅相关资料)。
    
      综上所述,如果生产环境您使用GPT分区推荐使用gdisk工具,最小化安装的系统需要手动安装哟~
    [root@yinzhengjie.com ~]# yum -y install gdisk
    Loaded plugins: fastestmirror
    Determining fastest mirrors
     * base: mirror.bit.edu.cn
     * extras: mirrors.bfsu.edu.cn
     * updates: mirror.bit.edu.cn
    base                                                                                                                                                 | 3.6 kB  00:00:00     
    extras                                                                                                                                               | 2.9 kB  00:00:00     
    updates                                                                                                                                              | 2.9 kB  00:00:00     
    (1/4): updates/7/x86_64/primary_db                                                                                                                   | 168 kB  00:00:00     
    (2/4): extras/7/x86_64/primary_db                                                                                                                    | 190 kB  00:00:00     
    (3/4): base/7/x86_64/group_gz                                                                                                                        | 153 kB  00:00:01     
    (4/4): base/7/x86_64/primary_db                                                                                                                      | 6.1 MB  00:00:03     
    Resolving Dependencies
    --> Running transaction check
    ---> Package gdisk.x86_64 0:0.8.10-3.el7 will be installed
    --> Finished Dependency Resolution
    
    Dependencies Resolved
    
    ============================================================================================================================================================================
     Package                                Arch                                    Version                                         Repository                             Size
    ============================================================================================================================================================================
    Installing:
     gdisk                                  x86_64                                  0.8.10-3.el7                                    base                                  190 k
    
    Transaction Summary
    ============================================================================================================================================================================
    Install  1 Package
    
    Total download size: 190 k
    Installed size: 660 k
    Downloading packages:
    gdisk-0.8.10-3.el7.x86_64.rpm                                                                                                                        | 190 kB  00:00:00     
    Running transaction check
    Running transaction test
    Transaction test succeeded
    Running transaction
      Installing : gdisk-0.8.10-3.el7.x86_64                                                                                                                                1/1 
      Verifying  : gdisk-0.8.10-3.el7.x86_64                                                                                                                                1/1 
    
    Installed:
      gdisk.x86_64 0:0.8.10-3.el7                                                                                                                                               
    
    Complete!
    [root@yinzhengjie.com ~]# 
    [root@yinzhengjie.com ~]# yum -y install gdisk          #安装gdisk工具

    三.gdisk工具使用案例

    [root@yinzhengjie.com ~]# gdisk /dev/sdc         #进入到gdisk工具的管理界面
    GPT fdisk (gdisk) version 0.8.10
    
    Partition table scan:
      MBR: not present
      BSD: not present
      APM: not present
      GPT: not present
    
    Creating new GPT entries.
    
    Command (? for help): 

    1>.查看帮助信息

    Command (? for help): ?
    b    back up GPT data to a file
    c    change a partition's name
    d    delete a partition
    i    show detailed information on a partition
    l    list known partition types
    n    add a new partition
    o    create a new empty GUID partition table (GPT)
    p    print the partition table
    q    quit without saving changes
    r    recovery and transformation options (experts only)
    s    sort partitions
    t    change a partition's type code
    v    verify disk
    w    write table to disk and exit
    x    extra functionality (experts only)
    ?    print this menu
    
    Command (? for help): 

    2>.新建分区

    Command (? for help): n                #执行新建分区的指令
    Partition number (1-128, default 1): 
    First sector (34-838860766, default = 2048) or {+-}size{KMGTP}: 
    Last sector (2048-838860766, default = 838860766) or {+-}size{KMGTP}: +100G        #这里的结束位置我这里写+100G
    Current type is 'Linux filesystem'
    Hex code or GUID (L to show codes, Enter = 8300):       #我们可以自定义创建分区的代码(默认是8300),输入字母"l"可以查看所有的代码标签哟~通常情况下我们直接回车即可。
    Changed type of partition to 'Linux filesystem'
    
    Command (? for help): 

    3>.查看分区信息

    Command (? for help): p
    Disk /dev/sdc: 838860800 sectors, 400.0 GiB
    Logical sector size: 512 bytes
    Disk identifier (GUID): 37B1331C-C436-48CA-B5A6-B157D0BB9AD0
    Partition table holds up to 128 entries
    First usable sector is 34, last usable sector is 838860766
    Partitions will be aligned on 2048-sector boundaries
    Total free space is 629145533 sectors (300.0 GiB)
    
    Number  Start (sector)    End (sector)  Size       Code  Name
       1            2048       209717247   100.0 GiB   8300  Linux filesystem
    
    Command (? for help): 

    4>.保存分区信息并退出

    Command (? for help): w            #保存分区信息到磁盘(默认所有的修改都放在内存中,直到执行当前的写入指令才会写入到磁盘。)
    
    Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING
    PARTITIONS!!
    
    Do you want to proceed? (Y/N): Y        #注意哈,这里得输入字母"Y"才能保存成功哟~
    OK; writing new GUID partition table (GPT) to /dev/sdc.
    The operation has completed successfully.
    [root@yinzhengjie.com ~]# 

    5>.命令行中查看gpt的分区信息

    [root@yinzhengjie.com ~]# gdisk -l /dev/sdc
    GPT fdisk (gdisk) version 0.8.10
    
    Partition table scan:
      MBR: protective
      BSD: not present
      APM: not present
      GPT: present
    
    Found valid GPT with protective MBR; using GPT.
    Disk /dev/sdc: 838860800 sectors, 400.0 GiB
    Logical sector size: 512 bytes
    Disk identifier (GUID): C4A5426E-BE89-46EE-B842-3CAC96156388
    Partition table holds up to 128 entries
    First usable sector is 34, last usable sector is 838860766
    Partitions will be aligned on 2048-sector boundaries
    Total free space is 629145533 sectors (300.0 GiB)
    
    Number  Start (sector)    End (sector)  Size       Code  Name
       1            2048       209717247   100.0 GiB   8300  Linux filesystem
    [root@yinzhengjie.com ~]# 
    [root@yinzhengjie.com ~]# fdisk -l /dev/sdc
    WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion.
    
    Disk /dev/sdc: 429.5 GB, 429496729600 bytes, 838860800 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: gpt
    Disk identifier: C4A5426E-BE89-46EE-B842-3CAC96156388
    
    
    #         Start          End    Size  Type            Name
     1         2048    209717247    100G  Linux filesyste Linux filesystem
    [root@yinzhengjie.com ~]# 
    [root@yinzhengjie.com ~]# 
    [root@yinzhengjie.com ~]# fdisk -l /dev/sdc          #对于GPT分区的磁盘虽然也可以使用fdisk工具查看,但还是推荐大家使用gdisk去管理GPT分区。
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  • 原文地址:https://www.cnblogs.com/yinzhengjie/p/12359770.html
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