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一 Linux运维实战之磁盘分区、格式化及挂载( 六 )

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[root@Centos dev]# mkfs -t ext3 /dev/sdb1#用ext3文件系统格式化sdb1分区 mke2fs 1.41.12 (17-May-2010) Filesystem label= OS type: Linux Block size=4096 (log=2)#块大小为4096B Fragment size=4096 (log=2) Stride=0 blocks, Stripestyle="color: #800080">0 blocks 131648 inodes, 526120 blocks 26306 blocks (5.00%) reserved for the super user#默认分区的5%的空间预留给管理使用的块First data block=0 Maximum filesystem blocks=54106521617 block groups32768 blocks per group, 32768 fragments per group 7744 inodes per group Superblock backups stored on blocks:32768, 98304, 163840, 229376, 294912Writing inode tables: done Creating journal (16384 blocks): done Writing superblocks and filesystem accounting information: doneThis filesystem will be automatically checked every 39 mounts or 180 days, whichever comes first.Use tune2fs -c or -i to override.[root@Centos dev]# mke2fs -b 2048 /dev/sdb1#调整分区sdb1的块大小为2048B mke2fs 1.41.12 (17-May-2010) Filesystem label= OS type: Linux Block size=2048 (log=1)#可以看到块大小变成了2048B了哈 Fragment size=2048 (log=1) Stride=0 blocks, Stripestyle="color: #800080">0 blocks 131560 inodes, 1052240 blocks 52612 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=53896806465 block groups16384 blocks per group, 16384 fragments per group 2024 inodes per group Superblock backups stored on blocks:16384, 49152, 81920, 114688, 147456, 409600, 442368, 802816Writing inode tables: done Writing superblocks and filesystem accounting information: doneThis filesystem will be automatically checked every 20 mounts or 180 days, whichever comes first.Use tune2fs -c or -i to override.3、查看/调整文件系统参数：
举例说明：
[root@Centos dev]# tune2fs -l /dev/sdb1#查看sdb1分区的超级块信息 tune2fs 1.41.12 (17-May-2010) Filesystem volume name: Last mounted on: Filesystem UUID:8f9d5e47-c3e2-441f-b29f-e0a9dd508632 #UUID Filesystem magic number:0xEF53#文件系统魔数 Filesystem revision #:1 (dynamic) Filesystem features:ext_attr resize_inode dir_index filetype sparse_super Filesystem flags: signed_directory_hashDefault mount options:(none) Filesystem state: clean Errors behavior:Continue Filesystem OS type:Linux Inode count:131560 Block count:1052240#总共块的数目 Reserved block count:52612 Free blocks:1031020 Free inodes:131549 First block:0 Block size:2048#块大小 Fragment size:2048 Reserved GDT blocks:512 Blocks per group: 16384 Fragments per group:16384 Inodes per group: 2024 Inode blocks per group:253 Filesystem created:Wed Feb 26 14:13:10 2014#文件系统创建日期 Last mount time:n/a Last write time:Wed Feb 26 14:13:10 2014 Mount count:0 Maximum mount count:20 Last checked:Wed Feb 26 14:13:10 2014 Check interval: 15552000 (6 months) Next check after: Mon Aug 25 14:13:10 2014 Reserved blocks uid:0 (user root)#预留空间所给的用户是管理员 Reserved blocks gid:0 (group root) First inode:11 Inode size:256Required extra isize:28 Desired extra isize:28 Default directory hash:half_md4 Directory Hash Seed:7b570d3a-1fe3-4d12-a9c3-3a5811e8cbe4设定卷标/查看卷标、UUID和文件系统类型：
[root@Centos ~]# e2label /dev/sdb1 MYDATA#设定sdb1的卷标为MYDATA [root@Centos ~]# blkid /dev/sdb1#UUID、文件系统类型和卷标 /dev/sdb1: UUID="284c3316-e0f8-4a87-8d49-72ab1c9964ae" TYPE="ext4" LABEL="MYDATA"【一 Linux运维实战之磁盘分区、格式化及挂载】文件系统创建完之后，我们还需要挂载分区才能够正常使用新创建好的分区 。

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