在linux系统上,可以用命令tune2fs ,测试如下
[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
上面Block size即为块大小。
在WINDOWS系统上,可以用命令fsutil来查看,测试如下:
C:/Documents and Settings/ct2>fsutil --help
--help 是无效参数。
---- 支持的命令 ----
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
上面簇字节数既为块大小。
注:第二扩展文件系统(second Extended Filesystem,Ext2)。 Ext3(third Extended Filesystem)
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.
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