查看linux文件系统块大小的实现方法

  [root@localhost test10g]# tune2fs -help  tune2fs 1.35 (28-Feb-2004)  tune2fs: invalid option -- h  Usage: tune2fs [-c max-mounts-count] [-e errors-behavior] [-g group]      [-i interval[d|m|w]] [-j] [-J journal-options]      [-l] [-s sparse-flag] [-m reserved-blocks-percent]      [-o [^]mount-options[,...]] [-r reserved-blocks-count]      [-u user] [-C mount-count] [-L volume-label] [-M last-mounted-dir]      [-O [^]feature[,...]] [-T last-check-time] [-U UUID] device  [root@localhost test10g]# df  Filesystem      1K-blocks   Used Available Use% Mounted on  /dev/sda2       8776068  7576504  753764 91% /  /dev/sda1        497829   16303  455824  4% /boot  none          517300     0  517300  0% /dev/shm  /dev/sda5       1035660   96452  886600 10% /tmp  [root@localhost test10g]# tune2fs -l /dev/sda1|grep Block  Block count:       514048  Block size:        1024        Blocks per group:     8192  [root@localhost test10g]# tune2fs -l /dev/sda2|grep Block  Block count:       2229018  Block size:        4096  Blocks per group:     32768  

  behavior    控制文件系统行为  dirty      管理卷的被损坏的位数  file      文件特定命令  fsinfo     文件系统信息  hardlink    硬链接管理  objectid    对象 ID 管理  quota      配额管理  reparsepoint  重分析点管理  sparse     稀疏文件控制  usn       USN 管理  volume     卷管理    C:Documents and Settingsct2>fsutil fsinfo ntfsinfo c:    NTFS 卷序列号 :    0x72ccb5f2ccb5b129  版本 :             3.1  区数量 :         0x0000000008ff8235  簇总数 :         0x00000000011ff046  可用簇 :         0x0000000000547b73  保留总数 :         0x0000000000000050  每个扇区字节数 :        512  每个簇字节数 :        4096  每个 FileRecord 段的字节数  : 1024  每个 FileRecord 段的簇数 : 0  Mft 有效数据长度 :      0x0000000009cac000  Mft 起始 Lcn :         0x00000000000c4df6  Mft2 起始 Lcn :         0x00000000008ff823  Mft 区域起始 :         0x0000000001067920  Mft 区域结尾  :         0x000000000108ce60  

  man fs      ext2  is the high performance disk filesystem used by Linux for fixed         disks  as  well as removable media.  The second extended         filesystem was designed as an extension of the extended file         system (ext).  ext2 offers the best performance (in terms of         speed and CPU usage) of the filesystems supported under Linux.      ext3  is a journaling version of the ext2 filesystem. It is easy to         switch back and forth between ext2 and ext3.      ext3  is a journaling version of the ext2 filesystem. ext3 offers the         most complete set of journaling options  available  among         journaling filesystems.