• 创建、修改、挂载磁盘


    使用fdisk 创建小于2T的磁盘分区

    -CU  为柱面分区并关闭DOS检测模式

    [root@web01 ~]# fdisk -cu /dev/sdc
    Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
    Building a new DOS disklabel with disk identifier 0x6df1fa98.
    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): 1 First sector (2048-208895, default 2048): Using default value 2048 Last sector, +sectors or +size{K,M,G} (2048-208895, default 208895): Using default value 208895 Command (m for help): p Disk /dev/sdc: 106 MB, 106954752 bytes 64 heads, 32 sectors/track, 102 cylinders, total 208896 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 identifier: 0x6df1fa98 Device Boot Start End Blocks Id System /dev/sdc1 2048 208895 103424 83 Linux Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks.

    更新磁盘分区表并格式化分区

    [root@web01 ~]# partprobe /dev/sdc1
    [root@web01 ~]# mkfs.ext4 /dev/sdc1
    mke2fs 1.41.12 (17-May-2010)
    Filesystem label=
    OS type: Linux
    Block size=1024 (log=0)
    Fragment size=1024 (log=0)
    Stride=0 blocks, Stripe width=0 blocks
    25896 inodes, 103424 blocks
    5171 blocks (5.00%) reserved for the super user
    First data block=1
    Maximum filesystem blocks=67371008
    13 block groups
    8192 blocks per group, 8192 fragments per group
    1992 inodes per group
    Superblock backups stored on blocks: 
        8193, 24577, 40961, 57345, 73729
    
    Writing inode tables: done                            
    Creating journal (4096 blocks): done
    Writing superblocks and filesystem accounting information: done
    
    This filesystem will be automatically checked every 37 mounts or
    180 days, whichever comes first.  Use tune2fs -c or -i to override.

    修改非系统磁盘的检测功能

    [root@web01 ~]# tune2fs -c 0 -i 0 /dev/sdc1
    tune2fs 1.41.12 (17-May-2010)
    Setting maximal mount count to -1
    Setting interval between checks to 0 seconds

    进行磁盘挂载操作(临时)

    [root@web01 ~]# mount /dev/sdc1 /data/
    [root@web01 ~]# df -h
    Filesystem      Size  Used Avail Use% Mounted on
    /dev/sda3       8.6G  2.2G  6.0G  27% /
    tmpfs           1.9G     0  1.9G   0% /dev/shm
    /dev/sda1       190M   40M  141M  22% /boot
    /dev/sdb1        94M  1.6M   88M   2% /data01
    /dev/sdc1        94M  1.6M   88M   2% /data

    永久挂载

    [root@web01 ~]# vim /etc/fstab 
    /dev/sdc1        /data            ext4    defaults    0 0        
    /tmp/500m swap swap defaults 0 0

    创建临时SWAP并挂载方法:

     先创建想要的swap大小的文件并格式化成SWAP 文件

    [root@web01 ~]# dd if=/dev/zero of=/tmp/50M bs=5M count=10
    10+0 records in
    10+0 records out
    52428800 bytes (52 MB) copied, 1.60872 s, 32.6 MB/s
    [root@web01 ~]# ls -hl /tmp
    total 551M
    -rw-r--r--. 1 root root 500M Mar 11 23:06 500m
    -rw-r--r--. 1 root root  50M Mar 16 15:27 50M
    drwxr-xr-x. 8 root root 4.0K Feb 18 10:18 etc

    [root@web01 ~]# mkswap /tmp/50M mkswap: /tmp/50M: warning: don't erase bootbits sectors on whole disk. Use -f to force. Setting up swapspace version 1, size = 51196 KiB no label, UUID=09421fee-e811-41b4-b2d3-c9a9640360a1

    进行挂载操作可分为临时与永久

    [root@web01 ~]# swapon /tmp/50M
    [root@web01 ~]# free
                 total       used       free     shared    buffers     cached
    Mem:       3908500     311092    3597408        208      27396     112084
    -/+ buffers/cache:     171612    3736888
    Swap:      1611764          0    1611764
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  • 原文地址:https://www.cnblogs.com/imp-W/p/10646508.html
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