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詳解:Linux 硬盤,格式化,分區(qū) 詳解


disk是linux自帶的硬盤分區(qū)工具,可以對(duì)硬盤進(jìn)行分區(qū),或者對(duì)硬盤分區(qū)進(jìn)行調(diào)整。

首先選擇要進(jìn)行操作的磁盤

[root@Linuxidc ~]# fdisk /dev/sdb

輸入m,列出可以執(zhí)行的命令

 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  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) 

輸入p,列出磁盤目前的分區(qū)情況

 Command (m for help): p  Disk /dev/sdb: 3221 MB, 3221225472 bytes  255 heads, 63 sectors/track, 391 cylinders  Units = cylinders of 16065 * 512 = 8225280 bytes  Device Boot Start End Blocks Id System  /dev/sdb1 1 1 8001 8e Linux LVM  /dev/sdb2 2 26 200812+ 83 Linux 

輸入d,然后選擇分區(qū),刪除現(xiàn)有分區(qū)

 Command (m for help): d  Partition number (1-4): 1  Command (m for help): d  Selected partition 2 

查看分區(qū)情況,確認(rèn)分區(qū)已經(jīng)刪除

 Command (m for help): print  Disk /dev/sdb: 3221 MB, 3221225472 bytes  255 heads, 63 sectors/track, 391 cylinders  Units = cylinders of 16065 * 512 = 8225280 bytes  Device Boot Start End Blocks Id System  Command (m for help): 

輸入n,建立新的磁盤分區(qū),首先建立兩個(gè)主磁盤分區(qū)

 Command (m for help): n  Command action  e extended  p primary partition (1-4)  p //建立主分區(qū) Partition number (1-4): 1 //分區(qū)號(hào) First cylinder (1-391, default 1): //分區(qū)起始位置 Using default value 1  Last cylinder or +size or +sizeM or +sizeK (1-391, default 391): 100 //分區(qū)結(jié)束位置,單位為扇區(qū)  Command (m for help): n //再建立一個(gè)分區(qū) Command action  e extended  p primary partition (1-4)  p   Partition number (1-4): 2 //分區(qū)號(hào)為2  First cylinder (101-391, default 101):   Using default value 101  Last cylinder or +size or +sizeM or +sizeK (101-391, default 391): +200M //分區(qū)結(jié)束位置,單位為M 

確認(rèn)分區(qū)建立成功

 Command (m for help): p  Disk /dev/sdb: 3221 MB, 3221225472 bytes  255 heads, 63 sectors/track, 391 cylinders  Units = cylinders of 16065 * 512 = 8225280 bytes  Device Boot Start End Blocks Id System  /dev/sdb1 1 100 803218+ 83 Linux  /dev/sdb2 101 125 200812+ 83 Linux 

再建立一個(gè)邏輯分區(qū)

 Command (m for help): n  Command action  e extended  p primary partition (1-4)  e //選擇擴(kuò)展分區(qū) Partition number (1-4): 3  First cylinder (126-391, default 126):   Using default value 126  Last cylinder or +size or +sizeM or +sizeK (126-391, default 391):   Using default value 391 

確認(rèn)擴(kuò)展分區(qū)建立成功

 Command (m for help): p  Disk /dev/sdb: 3221 MB, 3221225472 bytes  255 heads, 63 sectors/track, 391 cylinders  Units = cylinders of 16065 * 512 = 8225280 bytes  Device Boot Start End Blocks Id System  /dev/sdb1 1 100 803218+ 83 Linux  /dev/sdb2 101 125 200812+ 83 Linux /dev/sdb3 126 391 2136645 5 Extended 

在擴(kuò)展分區(qū)上建立兩個(gè)邏輯分區(qū)

 Command (m for help): n  Command action  l logical (5 or over)  p primary partition (1-4)  l //選擇邏輯分區(qū) First cylinder (126-391, default 126):   Using default value 126  Last cylinder or +size or +sizeM or +sizeK (126-391, default 391): +400M  Command (m for help): n  Command action  l logical (5 or over)  p primary partition (1-4)  l  First cylinder (176-391, default 176):   Using default value 176  Last cylinder or +size or +sizeM or +sizeK (176-391, default 391):   Using default value 391 

確認(rèn)邏輯分區(qū)建立成功

 Command (m for help): p  Disk /dev/sdb: 3221 MB, 3221225472 bytes  255 heads, 63 sectors/track, 391 cylinders  Units = cylinders of 16065 * 512 = 8225280 bytes  Device Boot Start End Blocks Id System  /dev/sdb1 1 100 803218+ 83 Linux  /dev/sdb2 101 125 200812+ 83 Linux  /dev/sdb3 126 391 2136645 5 Extended  /dev/sdb5 126 175 401593+ 83 Linux  /dev/sdb6 176 391 1734988+ 83 Linux  Command (m for help): 

從上面的結(jié)果我們可以看到,在硬盤sdb我們建立了2個(gè)主分區(qū)(sdb1,sdb2),1個(gè)擴(kuò)展分區(qū)(sdb3),2個(gè)邏輯分區(qū)(sdb5,sdb6)

注意:主分區(qū)和擴(kuò)展分區(qū)的磁盤號(hào)位1-4,也就是說最多有4個(gè)主分區(qū)或者擴(kuò)展分區(qū),邏輯分區(qū)開始的磁盤號(hào)為5,因此在這個(gè)實(shí)驗(yàn)中試沒有sdb4的。

最后對(duì)分區(qū)操作進(jìn)行保存

 Command (m for help): w  The partition table has been altered!  Calling ioctl() to re-read partition table.  Syncing disks. 

建立好分區(qū)之后我們還需要對(duì)分區(qū)進(jìn)行格式化才能在系統(tǒng)中使用磁盤。

在sdb1上建立ext2分區(qū)

 [root@linuxidc ~]# mkfs.ext2 /dev/sdb1 mke2fs 1.39 (29-May-2006)  Filesystem label=  OS type: Linux  Block size=4096 (log=2)  Fragment size=4096 (log=2)  100576 inodes, 200804 blocks  10040 blocks (5.00%) reserved for the super user  First data block=0  Maximum filesystem blocks=209715200  7 block groups  32768 blocks per group, 32768 fragments per group  14368 inodes per group  Superblock backups stored on blocks:   32768, 98304, 163840  Writing inode tables: done   Writing superblocks and filesystem accounting information: done  This filesystem will be automatically checked every 32 mounts or  180 days, whichever comes first. Use tune2fs -c or -i to override. 

在sdb6上建立ext3分區(qū)

 [root@linuxidc ~]# mkfs.ext3 /dev/sdb6  mke2fs 1.39 (29-May-2006)  Filesystem label=  OS type: Linux  Block size=4096 (log=2)  Fragment size=4096 (log=2)  217280 inodes, 433747 blocks  21687 blocks (5.00%) reserved for the super user  First data block=0  Maximum filesystem blocks=444596224  14 block groups  32768 blocks per group, 32768 fragments per group  15520 inodes per group  Superblock backups stored on blocks:   32768, 98304, 163840, 229376, 294912  Writing inode tables: done   Creating journal (8192 blocks): done  Writing superblocks and filesystem accounting information: done  This filesystem will be automatically checked every 32 mounts or  180 days, whichever comes first. Use tune2fs -c or -i to override.  [root@linuxidc ~]# 

建立兩個(gè)目錄/oracle和/web,將新建好的兩個(gè)分區(qū)掛載到系統(tǒng)

 [root@linuxidc ~]# mkdir /oracle  [root@linuxidc ~]# mkdir /web  [root@linuxidc ~]# mount /dev/sdb1 /oracle  [root@linuxidc ~]# mount /dev/sdb6 /web 

查看分區(qū)掛載情況

 [root@linuxidc ~]# df -h 文件系統(tǒng) 容量 已用 可用 已用% 掛載點(diǎn) /dev/mapper/VolGroup00-LogVol00  6.7G 2.8G 3.6G 44% /  /dev/sda1 99M 12M 82M 13% /boot  tmpfs 125M 0 125M 0% /dev/shm /dev/sdb1 773M 808K 733M 1% /oracle  /dev/sdb6 1.7G 35M 1.6G 3% /web 

如果需要每次開機(jī)自動(dòng)掛載則需要修改/etc/fstab文件,加入兩行配置

 [root@linuxidc ~]# vim /etc/fstab  /dev/VolGroup00/LogVol00 / ext3 defaults 1 1  LABEL=/boot /boot ext3 defaults 1 2  tmpfs /dev/shm tmpfs defaults 0 0  devpts /dev/pts devpts gid=5,mode=620 0 0  sysfs /sys sysfs defaults 0 0  proc /proc proc defaults 0 0  /dev/VolGroup00/LogVol01 swap swap defaults 0 0 /dev/sdb1 /oracle ext2 defaults 0 0  /dev/sdb6 /web ext3 defaults 0 0 

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