11G版本

BBED> print kcvfh

struct kcvfh, 860 bytes @0

struct kcvfhbfh, 20 bytes @0

ub1 type_kcbh @0 0x0b

ub1 frmt_kcbh @1 0xa2

ub1 spare1_kcbh @2 0x00

ub1 spare2_kcbh @3 0x00

ub4 rdba_kcbh @4 0x0dc00001 --这四个字节表示块地址即RDBA

ub4 bas_kcbh @8 0x00000000 --这4个字节表示块的scn低4位

ub2 wrp_kcbh @12 0x0000 --这4个字节表示块的scn高4位

ub1 seq_kcbh @14 0x01

ub1 flg_kcbh @15 0x04 (KCBHFCKV) 这个字节是块的flg 1 = virgin block 2 =

last change to the block was for a cleanout operation

4 = checksum value is set 8 = temporary data

这是一个可以组合的值 也就是说有为 6 的时候是

ub2 chkval_kcbh @16 0xd675 --块的校验值

ub2 spare3_kcbh @18 0x0000

struct kcvfhhdr, 76 bytes @20

ub4 kccfhswv @20 0x00000000

ub4 kccfhcvn @24 0x0b200000

ub4 kccfhdbi @28 0xff6cdb51 --0028――0031 4个字节存储DBID

text kccfhdbn[0] @32 D --这个8个bytes存放的是数据库名的ascii码表示

text kccfhdbn[1] @33 B

text kccfhdbn[2] @34 S

text kccfhdbn[3] @35 E

text kccfhdbn[4] @36 R

text kccfhdbn[5] @37 V

text kccfhdbn[6] @38 E

text kccfhdbn[7] @39 R

ub4 kccfhcsq @40 0x002105b0 --这4个字节存放的是Control Seq

ub4 kccfhfsz @44 0x0015b048 --这四个字节存放的是文件当前所包含的块数

s_blkz kccfhbsz @48 0x00 --这四个字节存放的是文件的块大小

ub2 kccfhfno @52 0x0037 --这两个字节存放的是文件号

ub2 kccfhtyp @54 0x0003

--这两个字节存放的是文件的类型，03表示为数据文件,06表示为undo文件

ub4 kccfhacid @56 0x00000000

ub4 kccfhcks @60 0x00000000

text kccfhtag[0] @64

text kccfhtag[1] @65

text kccfhtag[2] @66

text kccfhtag[3] @67

text kccfhtag[4] @68

text kccfhtag[5] @69

text kccfhtag[6] @70

text kccfhtag[7] @71

text kccfhtag[8] @72

text kccfhtag[9] @73

text kccfhtag[10] @74

text kccfhtag[11] @75

text kccfhtag[12] @76

text kccfhtag[13] @77

text kccfhtag[14] @78

text kccfhtag[15] @79

text kccfhtag[16] @80

text kccfhtag[17] @81

text kccfhtag[18] @82

text kccfhtag[19] @83

text kccfhtag[20] @84

text kccfhtag[21] @85

text kccfhtag[22] @86

text kccfhtag[23] @87

text kccfhtag[24] @88

text kccfhtag[25] @89

text kccfhtag[26] @90

text kccfhtag[27] @91

text kccfhtag[28] @92

text kccfhtag[29] @93

text kccfhtag[30] @94

text kccfhtag[31] @95

ub4 kcvfhrdb @96 0x00000000 --root dba

struct kcvfhcrs, 8 bytes @100

ub4 kscnbas @100 0x0d25a596 -- 这4个字节存放的是该文件所属表空间创建时的scn 的低四位

v$datafile.CREATION_CHANGE#

ub2 kscnwrp @104 0x0000

ub4 kcvfhcrt @108 0x2db6e34e

ub4 kcvfhrlc @112 0x2d7c2354 --这四个字节存放的是reset logs count

struct kcvfhrls, 8 bytes @116

ub4 kscnbas @116 0x000e6c20 --这4个字节存放的是reset logs

scn，原来在数据文件头中也记录了上次的resetlog的scn

ub2 kscnwrp @120 0x0000

ub4 kcvfhbti @124 0x00000000

struct kcvfhbsc, 8 bytes @128

ub4 kscnbas @128 0x00000000 --这4个字节存放的是Backup taken scn

ub2 kscnwrp @132 0x0000

ub2 kcvfhbth @136 0x0000

ub2 kcvfhsta @138 0x0004 (KCVFHOFZ)

--这个字节表示数据文件状态，04应该为正常，00是关闭，01是begin backup

struct kcvfhckp, 36 bytes @484

struct kcvcpscn, 8 bytes @484

ub4 kscnbas @484 0x8940c638 --SCN of last change to the datafile.

低四位

ub2 kscnwrp @488 0x0841 --高四位

ub4 kcvcptim @492 0x2eac2488 --Time of the last change to the

datafile

ub2 kcvcpthr @496 0x0001 --这个字节表示应该是写resetlogs的thread号

union u, 12 bytes @500

struct kcvcprba, 12 bytes @500

ub4 kcrbaseq @500 0x000020f2 --这三个字节存放的RBA sequence号码

ub4 kcrbabno @504 0x00000002 --block号

ub2 kcrbabof @508 0x0010 --偏移量

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

ub4 kcvfhcpc @140 0x00001191 --这四个字节表示数据文件发生checkpoint次数

ub4 kcvfhrts @144 0x00000000

ub4 kcvfhccc @148 0x00001190 --这两个字节表示数据文件ctl cnt Unknown, but is

always 1 less than thecheckpoint point count.

struct kcvfhbcp, 36 bytes @152

struct kcvcpscn, 8 bytes @152

ub4 kscnbas @152 0x00000000

ub2 kscnwrp @156 0x0000

ub4 kcvcptim @160 0x00000000

ub2 kcvcpthr @164 0x0000

union u, 12 bytes @168

struct kcvcprba, 12 bytes @168

ub4 kcrbaseq @168 0x00000000

ub4 kcrbabno @172 0x00000000

ub2 kcrbabof @176 0x0000

ub1 kcvcpetb[0] @180 0x00

ub1 kcvcpetb[1] @181 0x00

ub1 kcvcpetb[2] @182 0x00

ub1 kcvcpetb[3] @183 0x00

ub1 kcvcpetb[4] @184 0x00

ub1 kcvcpetb[5] @185 0x00

ub1 kcvcpetb[6] @186 0x00

ub1 kcvcpetb[7] @187 0x00

ub4 kcvfhbhz @312 0x00000000

struct kcvfhxcd, 16 bytes @316

ub4 space_kcvmxcd[0] @316 0x00000000

ub4 space_kcvmxcd[1] @320 0x00000000

ub4 space_kcvmxcd[2] @324 0x00000000

ub4 space_kcvmxcd[3] @328 0x00000000

sword kcvfhtsn @332 23 --这个字节存放的是该文件所属tablespace号

ub2 kcvfhtln @336 0x0008

text kcvfhtnm[0] @338 H --这几个字节存放的是tablespace名的ascii表示。

text kcvfhtnm[1] @339 I

text kcvfhtnm[2] @340 S

text kcvfhtnm[3] @341 _

text kcvfhtnm[4] @342 D

text kcvfhtnm[5] @343 A

text kcvfhtnm[6] @344 T

text kcvfhtnm[7] @345 A

text kcvfhtnm[8] @346

text kcvfhtnm[9] @347

text kcvfhtnm[10] @348

text kcvfhtnm[11] @349

text kcvfhtnm[12] @350

text kcvfhtnm[13] @351

text kcvfhtnm[14] @352

text kcvfhtnm[15] @353

text kcvfhtnm[16] @354

text kcvfhtnm[17] @355

text kcvfhtnm[18] @356

text kcvfhtnm[19] @357

text kcvfhtnm[20] @358

text kcvfhtnm[21] @359

text kcvfhtnm[22] @360

text kcvfhtnm[23] @361

text kcvfhtnm[24] @362

text kcvfhtnm[25] @363

text kcvfhtnm[26] @364

text kcvfhtnm[27] @365

text kcvfhtnm[28] @366

text kcvfhtnm[29] @367

ub4 kcvfhrfn @368 0x00000037

struct kcvfhrfs, 8 bytes @372

ub4 kscnbas @372 0x00000000

ub2 kscnwrp @376 0x0000

ub4 kcvfhrft @380 0x00000000

struct kcvfhafs, 8 bytes @384

ub4 kscnbas @384 0x00000000

ub2 kscnwrp @388 0x0000

ub4 kcvfhbbc @392 0x00000000

ub4 kcvfhncb @396 0x00000000

ub4 kcvfhmcb @400 0x00000000

ub4 kcvfhlcb @404 0x00000000

ub4 kcvfhbcs @408 0x00000000

ub2 kcvfhofb @412 0x0000

ub2 kcvfhnfb @414 0x0000

ub4 kcvfhprc @416 0x296b946b --这四个字节存放的是prev reset logs count

struct kcvfhprs, 8 bytes @420

ub4 kscnbas @420 0x00000001 --这4个字节存放的是prev reset logs scn

ub2 kscnwrp @424 0x0000

struct kcvfhprfs, 8 bytes @428

ub4 kscnbas @428 0x00000000

ub2 kscnwrp @432 0x0000

ub4 kcvfhtrt @444 0x00000000