Aix&Linux&Windows操作系统block size查看
Oracle有db_block_size，操作系统也有 block size，下面简要介绍
AIX:
查看AIX操作系统 每个block size 大小：
# lsfs -q /u01
Name Nodename Mount Pt VFS Size Options Auto Accounting
/dev/fslv00 -- /u01 jfs2 50331648 rw yes no
(lv size: 50331648, fs size: 50331648, block size: 4096, sparse files: yes, inline log: no, inline log size: 0, EAformat: v1, Quota: no, DMAPI: no, VIX: no)
Windows:
C:/Documents and Settings/Administrator>fsutil fsinfo ntfsinfo c:
NTFS Volume Serial Number : 0xfae82044e81ffe0f
Version : 3.1
Number Sectors : 0x0000000004ffffff
Total Clusters : 0x00000000009fffff
Free Clusters : 0x00000000003ff408
Total Reserved : 0x0000000000000000
Bytes Per Sector : 512
Bytes Per Cluster : 4096
Bytes Per FileRecord Segment : 1024
Clusters Per FileRecord Segment : 0
Mft Valid Data Length : 0x000000000fac8000
Mft Start Lcn : 0x00000000000c0000
Mft2 Start Lcn : 0x0000000000000010
Mft Zone Start : 0x00000000000cfac0
Mft Zone End : 0x0000000000200000
Linux:
[root@mahee ~]# tune2fs -l /dev/sda1
tune2fs 1.39 (29-May-2006)
Filesystem volume name: /
Last mounted on: <not available>
Filesystem UUID: 05b4b85c-eb01-4d22-b011-4307b910010b
Filesystem magic number: 0xEF53
Filesystem revision #: 1 (dynamic)
Filesystem features: has_journal ext_attr resize_inode dir_index filetype needs_recovery sparse_super large_file
Default mount options: user_xattr acl
Filesystem state: clean
Errors behavior: Continue
Filesystem OS type: Linux
Inode count: 5124480
Block count: 5120710
Reserved block count: 256035
Free blocks: 4312881
Free inodes: 5006108
First block: 0
Block size: 4096
Fragment size: 4096
Reserved GDT blocks: 1022
Blocks per group: 32768
Fragments per group: 32768
Inodes per group: 32640
Inode blocks per group: 1020
Filesystem created: Mon Dec 13 22:20:57 2010
Last mount time: Thu Feb 10 08:39:51 2011
Last write time: Thu Feb 10 08:39:51 2011
Mount count: 18
Maximum mount count: -1
Last checked: Mon Dec 13 22:20:57 2010
Check interval: 0 (<none>)
Reserved blocks uid: 0 (user root)
Reserved blocks gid: 0 (group root)
First inode: 11
Inode size: 128
Journal inode: 8
First orphan inode: 2872327
Default directory hash: tea
Directory Hash Seed: 3f80d852-e54e-4a21-8142-b3e30299fdd2
Journal backup: inode blocks
