Linux使用fdisk进行gpt超大磁盘的分区与挂载

绝地灬酷狼 2023-03-04 16:20 277阅读 0赞

# 创建分区 #

[root@7-64-test ~]# fdisk -l					//查询磁盘情况
    
    Disk /dev/sda: 21.5 GB, 21474836480 bytes, 41943040 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: 0x000c145a
    
       Device Boot      Start         End      Blocks   Id  System
    /dev/sda1   *        2048      616447      307200   83  Linux
    /dev/sda2          616448    41943039    20663296   8e  Linux LVM
    
    Disk /dev/sdb: 1073 MB, 1073741824 bytes, 2097152 sectors		//新增加的空白磁盘
    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/centos-root: 17.9 GB, 17930649600 bytes, 35020800 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/centos-swap: 3221 MB, 3221225472 bytes, 6291456 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
    
    [root@7-64-test ~]# fdisk -l /dev/sdb			//查看新增的磁盘								
    
    Disk /dev/sdb: 1073 MB, 1073741824 bytes, 2097152 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
    
    [root@7-64-test ~]# fdisk  /dev/sdb				//进行分区
    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.
    
    Device does not contain a recognized partition table
    Building a new DOS disklabel with disk identifier 0x1bdd0658.
    
    Command (m for help): p
    
    Disk /dev/sdb: 1073 MB, 1073741824 bytes, 2097152 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: 0x1bdd0658
    
       Device Boot      Start         End      Blocks   Id  System
    
    Command (m for help): m
    Command action
       a   toggle a bootable flag
       b   edit bsd disklabel
       c   toggle the dos compatibility flag
       d   delete a partition
       g   create a new empty GPT partition table
       G   create an IRIX (SGI) partition table
       l   list known partition types
       m   print this menu
       n   add a new partition
       o   create a new empty DOS partition table
       p   print the partition table
       q   quit without saving changes
       s   create a new empty Sun disklabel
       t   change a partition's system id
       u   change display/entry units
       v   verify the partition table
       w   write table to disk and exit
       x   extra functionality (experts only)
    
    Command (m for help): g					//创建gpt磁盘
    Building a new GPT disklabel (GUID: 26965E7C-1CD5-4EB3-B1F4-DE7E5B896224)
    
    
    Command (m for help): p
    
    Disk /dev/sdb: 1073 MB, 1073741824 bytes, 2097152 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: 26965E7C-1CD5-4EB3-B1F4-DE7E5B896224
    
    
    #         Start          End    Size  Type            Name
    
    Command (m for help): n						//新建分区
    Partition number (1-128, default 1): 
    First sector (2048-2097118, default 2048): 
    Last sector, +sectors or +size{K,M,G,T,P} (2048-2097118, default 2097118): +100M
    Created partition 1
    
    
    Command (m for help): p
    
    Disk /dev/sdb: 1073 MB, 1073741824 bytes, 2097152 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: 26965E7C-1CD5-4EB3-B1F4-DE7E5B896224
    
    
    #         Start          End    Size  Type            Name
     1         2048       206847    100M  Linux filesyste 
    
    Command (m for help): w						//保存退出
    The partition table has been altered!
    
    Calling ioctl() to re-read partition table.
    Syncing disks.

# 格式化新增的分区 #

[root@7-64-test ~]# mkfs.xfs /dev/sdb1			//格式化新建的分区
    meta-data=/dev/sdb1              isize=512    agcount=4, agsize=6400 blks
             =                       sectsz=512   attr=2, projid32bit=1
             =                       crc=1        finobt=0, sparse=0
    data     =                       bsize=4096   blocks=25600, imaxpct=25
             =                       sunit=0      swidth=0 blks
    naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
    log      =internal log           bsize=4096   blocks=855, version=2
             =                       sectsz=512   sunit=0 blks, lazy-count=1
    realtime =none                   extsz=4096   blocks=0, rtextents=0
    [root@7-64-test ~]# partprobe 				//无需重启加载分区信息
    Warning: Unable to open /dev/sr0 read-write (Read-only file system).  /dev/sr0 has been opened read-only.							//这个警告无关紧要

# 挂载新建的分区 #

[root@7-64-test ~]# mount /dev/sdb1 /root/test_mnt/			//挂载新建的分区

# 写入测试数据并查看挂载情况 #

[root@7-64-test ~]# dd if=/dev/zero of=/root/test_mnt/test.txt bs=1M count=40		//写入测试的数据
    40+0 records in
    40+0 records out
    41943040 bytes (42 MB) copied, 0.0232881 s, 1.8 GB/s
    [root@7-64-test ~]# df -Th						//查看挂载情况
    Filesystem              Type      Size  Used Avail Use% Mounted on
    devtmpfs                devtmpfs  475M     0  475M   0% /dev
    tmpfs                   tmpfs     487M     0  487M   0% /dev/shm
    tmpfs                   tmpfs     487M  7.7M  479M   2% /run
    tmpfs                   tmpfs     487M     0  487M   0% /sys/fs/cgroup
    /dev/mapper/centos-root xfs        17G  2.6G   15G  16% /
    /dev/sda1               xfs       297M  120M  178M  41% /boot
    tmpfs                   tmpfs      98M     0   98M   0% /run/user/0
    /dev/sdb1               xfs        97M   46M   52M  47% /root/test_mnt
    [root@7-64-test ~]# du -sh /root/test_mnt/			//查询挂载点使用情况
    40M	/root/test_mnt/

使用blkid命令可以获取设备的UUID。复制记下sdb1的UUID。

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然后写入文件/etc/fstab 开机自动挂载

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