itli: 1 ispac: 0 maxfr: 4863
tabn: 0 slot: 1(0x1) flag: 0x2c lock: 1 ckix: 182
ncol: 19 nnew: 6 size: -7
col 4: [ 7] 78 71 0c 02 0e 16 26
col 5: *NULL*
col 6: [ 7] 78 71 0c 02 0e 17 26
col 7: [21]
c0 06 60 3d 13 34 56 13 34 56 13 34 56 13 34 56 13 34 56 1e 0b
col 9: [ 1] 80
col 10: [ 1] 80
###################################################################
6：使用BBED查看数据文件头CHECKPOINT_CHANGE#及rba
[oracle@bys3 ~]$ cat par.bbdblocksize=8192
listfile=bbedfile.txt
mode=edit
[oracle@bys3 ~]$ cat bbedfile.txt
1 /u01/oradata/bys3/system01.dbf 524288000
2 /u01/oradata/bys3/sysaux01.dbf 340787200
3 /u01/oradata/bys3/undotbs01.dbf 209715200
4 /u01/oradata/bys3/user01.dbf 52428800
[oracle@bys3 ~]$ bbed parfile=par.bbd
Password:
BBED: Release 2.0.0.0.0 - Limited Production on Sun Dec 1 22:29:18 2013
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
************ !!! For Oracle Internal Use only !!! ***************
BBED> set file 4 block 1
FILE# 4
BLOCK# 1
BBED> map /v
File: /u01/oradata/bys3/user01.dbf (4)
Block: 1 Dba:0x01000001
------------------------------------------------------------
Data File Header
struct kcvfh, 860 bytes @0
struct kcvfhbfh, 20 bytes @0
struct kcvfhhdr, 76 bytes @20
ub4 kcvfhrdb @96
struct kcvfhcrs, 8 bytes @100
ub4 kcvfhcrt @108
ub4 kcvfhrlc @112
struct kcvfhrls, 8 bytes @116
ub4 kcvfhbti @124
struct kcvfhbsc, 8 bytes @128
ub2 kcvfhbth @136
ub2 kcvfhsta @138
struct kcvfhckp, 36 bytes @484
ub4 kcvfhcpc @140
ub4 kcvfhrts @144
ub4 kcvfhccc @148
struct kcvfhbcp, 36 bytes @152
ub4 kcvfhbhz @312
struct kcvfhxcd, 16 bytes @316
sword kcvfhtsn @332
ub2 kcvfhtln @336
text kcvfhtnm[30] @338
ub4 kcvfhrfn @368
ub4 kcvfhrft @380
struct kcvfhafs, 8 bytes @384
ub4 kcvfhbbc @392
ub4 kcvfhncb @396
ub4 kcvfhmcb @400
ub4 kcvfhlcb @404
ub4 kcvfhbcs @408
ub2 kcvfhofb @412
ub2 kcvfhnfb @414
ub4 kcvfhprc @416
struct kcvfhprs, 8 bytes @420
struct kcvfhprfs, 8 bytes @428
ub4 kcvfhtrt @444
ub4 tailchk @8188
BBED> print kcvfhckp
struct kcvfhckp, 36 bytes @484
struct kc vcpscn, 8 bytes @484
ub4 kscnbas @484 0x001e6231
ub2 kscnwrp @488 0x0000
ub4 kcvcptim @492 0x31a859e6
ub2 kcvcpthr @496 0x0001
union u, 12 bytes @500
struct kcvcprba, 12 bytes @500
ub4 kcrbaseq @500 0x0000006b
ub4 kcrbabno @504 0x00000002
ub2 kcrbabof @508 0x0010
ub1 kcvcpetb[0] @512 0x02
ub1 kcvcpetb[1] @513 0x00
ub1 kcvcpetb[2] @514 0x00
ub1 kcvcpetb[3] @515 0x00
ub1 kcvcpetb[4] @516 0x00
ub1 kcvcpetb[5] @517 0x00
ub1 kcvcpetb[6] @518 0x00
ub1 kcvcpetb[7] @519 0x00
BBED> set offset 500
OFFSET 500
BBED> dump /v ---@500开始，4字节表示日志序号，4字节表示块号，2字节表示日志块中第几个字节，表示的是数据文件头的RBA信息
从数据块中计算出的RBA信息与print kcvfhckp中的一致，就不重复算了。
关于日志块大小，详见：http://blog.csdn.net/q947817003/article/details/11350359
File: /u01/oradata/bys3/user01.dbf (4)
Block: 1 Offsets: 500 to 1011 Dba:0x01000001
-------------------------------------------------------
6b000000 02000000 10000400 02000000 l k...............
00000000 00000000 00000000 00000000 l ................
00000000 00000000 00000000 00000000 l ................
省略。。。。
<16 bytes per line>
这里CHKPOINT_SCN信息是：
struct kcvcpscn, 8 bytes @484
ub4 kscnbas @484 0x001e6231
ub2 kscnwrp @488 0x0000
这三行就是检查点的SCN信息，kscnbas--0x001c8e12，kscnwrp--0x0000ub4 --实验有效的4个byte： 0x0000
scn计算方法：SCN=(SCN_WRP * 4294967296) + SCN_BAS --SCN的详细介绍及计算：http://blog.csdn.net/q947817003/articl