linux U盘分区和格式化

原文地址：https://blog.csdn.net/qq_14935437/article/details/81129538

Linux：

U盘删除分区：

    #fdisk /dev/sdb    /*进入fdisk命令操作空间*/
    #Command (m for help): m     /*命令查看*/
    Command action
    a   toggle a bootable flag                   #设置引导扇区
    b   edit bsd disklabel                       #编辑卷标（linux下使用的卷标bsd通用）
    c   toggle the dos compatibility flag
    d   delete a partition                       #删除分区
    l   list known partition types               #列出已知的分区类型
    m   print this menu       
    n   add a new partition                      #添加一个新的分区
    o   create a new empty DOS partition table   #生成一个新的空DOS分区列表
    p   print the partition table                #打印分区列表
    q   quit without saving changes              #不保存退出
    s   create a new empty Sun disklabel
    t   change a partition's system id           #改变一个分区列表的ID
    u   change display/entry units
    v   verify the partition table
    w   write table to disk and exit             #写入列表到磁盘并退出
    x   extra functionality (experts only)
     
     
    #Command (m for help): p
    Disk /dev/sdb: 2055 MB, 2055208960 bytes
    64 heads, 62 sectors/track, 1011 cylinders
    Units = cylinders of 3968 * 512 = 2031616 bytes
    Disk identifier: 0x00000000
     
    Device Boot      Start         End      Blocks   Id  System
    /dev/sdb1               1         133      263871+   6  FAT16
    /dev/sdb2   *         134         200      132928   83  Linux   /*boot 分区*/
     
     
    ＃Command (m for help): d
    ＃Partition number (1-4): 1
    ＃Command (m for help): p
     
    Disk /dev/sdb: 2055 MB, 2055208960 bytes
    64 heads, 62 sectors/track, 1011 cylinders
    Units = cylinders of 3968 * 512 = 2031616 bytes
    Disk identifier: 0x00000000
     
    Device Boot      Start         End      Blocks   Id  System
    /dev/sdb2   *         134         200      132928   83  Linu
     
     
    ＃Command (m for help): d
    Selected partition 2
     
     
    ＃Command (m for help): p                                      /*查看此时已无分区*/
     
    Disk /dev/sdb: 2055 MB, 2055208960 bytes
    64 heads, 62 sectors/track, 1011 cylinders
    Units = cylinders of 3968 * 512 = 2031616 bytes
    Disk identifier: 0x00000000
     
    Device Boot      Start         End      Blocks   Id  System
     
     
    ＃Command (m for help): w                                      /*最后写入分区表*/
    The partition table has been altered!
     
    Calling ioctl() to re-read partition table.
     
    WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
    The kernel still uses the old table.
    The new table will be used at the next reboot.
    Syncing disks.

U盘不分区直接格式化：

    /* 在整个/dev/sdb设备上建立文件系统 */
     
    ＃sudo mkfs -t vfat -I /dev/sdb1         /*在整个/dev/sdb设备上建立文件系统*/

U盘分区并格式化：

    /*给磁盘增加一分区并格式化*/
     
    ＃Command (m for help): n
    Command action
    e   extended
    p   primary partition (1-4)
    ：p                                                                 /*增加主分区*/
    ＃Partition number (1-4): 1
    ＃First cylinder (1-1011, default 1):                               /*回车默认*/
    Using default value 1
    ＃Last cylinder, +cylinders or +size{K,M,G} (1-1011, default 1011): /*回车默认*/
    Using default value 1011
     
     
    ＃Command (m for help): p                                           /*此时有sdb1分区*/
    Disk /dev/sdb: 2055 MB, 2055208960 bytes
    64 heads, 62 sectors/track, 1011 cylinders
    Units = cylinders of 3968 * 512 = 2031616 bytes
    Disk identifier: 0x00000000
     
    Device Boot      Start         End      Blocks   Id  System
    /dev/sdb1               1        1011     2005793   83  Linux
     
     
    ＃Command (m for help): w                                           /*最后写入分区表*/
    The partition table has been altered!
     
    Calling ioctl() to re-read partition table.
    Syncing disks.
     
    ＃sudo mkfs -t vfat /dev/sdb1                                       /*分区完成后格式化*/

格式化完成后， 使用U盘之前需要修复一下，修复命令： fsck -t vfat /dev/sdb
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作者：半遮雨
来源：CSDN
原文：https://blog.csdn.net/qq_14935437/article/details/81129538
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