查看linux文件系统块大小的实现方法

[root@localhost test10g]# tune2fs -helptune2fs 1.35 (28-Feb-2004)tune2fs: invalid option -- hUsage: 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]# dfFilesystem      1K-blocks   Used Available Use% Mounted on/dev/sda2       8776068  7576504  753764 91% //dev/sda1        497829   16303  455824  4% /bootnone          517300     0  517300  0% /dev/shm/dev/sda5       1035660   96452  886600 10% /tmp[root@localhost test10g]# tune2fs -l /dev/sda1|grep BlockBlock count:       514048Block size:        1024      Blocks per group:     8192[root@localhost test10g]# tune2fs -l /dev/sda2|grep BlockBlock count:       2229018Block size:        4096Blocks 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 Settings/ct2>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 : 0Mft 有效数据长度 :      0x0000000009cac000Mft 起始 Lcn :         0x00000000000c4df6Mft2 起始 Lcn :         0x00000000008ff823Mft 区域起始 :         0x0000000001067920Mft 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.