AMDU抽取ASM files(ASM nomount)

最新推荐文章于 2025-06-26 08:45:00 发布

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最新推荐文章于 2025-06-26 08:45:00 发布

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分类专栏： ASM 文章标签： AMDU amdu抽取asm file

本文链接：https://blog.youkuaiyun.com/zhengwei125/article/details/51692051

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本文介绍了在ASM磁盘组处于Nomount状态时，如何利用AMDU工具来抽取ASM文件，包括控制文件、SPFILE、数据文件和redo日志文件的过程，并展示了具体的操作步骤和输出结果。

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偷学自Roger大神的博客 http://www.killdb.com/2013/01/15/oracle-asm-%E5%89%96%E6%9E%90%E7%B3%BB%E5%88%975-alias-directory.html

ASM磁盘组在nomount状态,起不来的情况下如何利用amdu来抽取asm files?

1. ASM alias 元数据在哪个位置呢？

SQL> select number_kffxp file#, disk_kffxp disk#, count(disk_kffxp) extents

from x$kffxp

where group_kffxp=1

and disk_kffxp <> 65534

group by number_kffxp, disk_kffxp; 2 3 4 5

FILE#DISK# EXTENTS

---------- ---------- ----------

1 0 1

1 2 1

2 2 1

3 0 29

3 1 28

3 2 28

4 0 3

4 1 3

4 2 2

5 1 1

6 0 1 +++alias directory 位置

FILE#DISK# EXTENTS

---------- ---------- ----------

8 2 1

9 2 1

256 0 8

256 1 8

256 2 8

257 0 18

257 1 17

既然我们知道alias directory 信息是file 6，那么就可以使用kfed工具来进行读取了。

—首先我们定位到file directory

[root@node1 grid]# kfed read /dev/raw/raw5 aun=2 blkn=1|more

kfbh.endian: 1 ; 0x000: 0x01

kfbh.hard: 130 ; 0x001: 0x82

kfbh.type: 4 ; 0x002: KFBTYP_FILEDIR

kfbh.datfmt: 1 ; 0x003: 0x01

kfbh.block.blk: 1 ; 0x004: blk=1

kfbh.block.obj: 1 ; 0x008: file=1

kfbh.check: 3455476529 ; 0x00c: 0xcdf66331

kfbh.fcn.base: 495 ; 0x010: 0x000001ef

kfbh.fcn.wrap: 0 ; 0x014: 0x00000000

kfbh.spare1: 0 ; 0x018: 0x00000000

kfbh.spare2: 0 ; 0x01c: 0x00000000

kfffdb.node.incarn: 1 ; 0x000: A=1 NUMM=0x0

kfffdb.node.frlist.number: 4294967295 ; 0x004: 0xffffffff

kfffdb.node.frlist.incarn: 0 ; 0x008: A=0 NUMM=0x0

kfffdb.hibytes: 0 ; 0x00c: 0x00000000

kfffdb.lobytes: 2097152 ; 0x010: 0x00200000

kfffdb.xtntcnt: 2 ; 0x014: 0x00000002

kfffdb.xtnteof: 2 ; 0x018: 0x00000002

kfffdb.blkSize: 4096 ; 0x01c: 0x00001000

kfffdb.flags: 1 ; 0x020: O=1 S=0 S=0 D=0 C=0 I=0 R=0 A=0

kfffdb.fileType: 15 ; 0x021: 0x0f

kfffdb.dXrs: 17 ; 0x022: SCHE=0x1 NUMB=0x1

kfffdb.iXrs: 17 ; 0x023: SCHE=0x1 NUMB=0x1

kfffdb.dXsiz[0]: 4294967295 ; 0x024: 0xffffffff

kfffdb.dXsiz[1]: 0 ; 0x028: 0x00000000

kfffdb.dXsiz[2]: 0 ; 0x02c: 0x00000000

kfffdb.iXsiz[0]: 4294967295 ; 0x030: 0xffffffff

kfffdb.iXsiz[1]: 0 ; 0x034: 0x00000000

kfffdb.iXsiz[2]: 0 ; 0x038: 0x00000000

kfffdb.xtntblk: 2 ; 0x03c: 0x0002

kfffdb.break: 60 ; 0x03e: 0x003c

kfffdb.priZn: 0 ; 0x040: KFDZN_COLD

kfffdb.secZn: 0 ; 0x041: KFDZN_COLD

kfffdb.ub2spare: 0 ; 0x042: 0x0000

kfffdb.alias[0]: 4294967295 ; 0x044: 0xffffffff

kfffdb.alias[1]: 4294967295 ; 0x048: 0xffffffff

kfffdb.strpwdth: 0 ; 0x04c: 0x00

kfffdb.strpsz: 0 ; 0x04d: 0x00

kfffdb.usmsz: 0 ; 0x04e: 0x0000

kfffdb.crets.hi: 33036718 ; 0x050: HOUR=0xe DAYS=0xd MNTH=0x6 YEAR=0x7e0

kfffdb.crets.lo: 3478214656 ; 0x054: USEC=0x0 MSEC=0x56 SECS=0x35 MINS=0x33

kfffdb.modts.hi: 33036718 ; 0x058: HOUR=0xe DAYS=0xd MNTH=0x6 YEAR=0x7e0

kfffdb.modts.lo: 3478214656 ; 0x05c: USEC=0x0 MSEC=0x56 SECS=0x35 MINS=0x33

kfffdb.dasz[0]: 0 ; 0x060: 0x00

kfffdb.dasz[1]: 0 ; 0x061: 0x00

kfffdb.dasz[2]: 0 ; 0x062: 0x00

kfffdb.dasz[3]: 0 ; 0x063: 0x00

kfffdb.permissn: 0 ; 0x064: 0x00

kfffdb.ub1spar1: 0 ; 0x065: 0x00

kfffdb.ub2spar2: 0 ; 0x066: 0x0000

kfffdb.user.entnum: 0 ; 0x068: 0x0000

kfffdb.user.entinc: 0 ; 0x06a: 0x0000

kfffdb.group.entnum: 0 ; 0x06c: 0x0000

kfffdb.group.entinc: 0 ; 0x06e: 0x0000

kfffdb.spare[0]: 0 ; 0x070: 0x00000000

... ...

kfffdb.usm: ; 0x0a0: length=0

kfffde[0].xptr.au: 2 ; 0x4a0: 0x00000002

kfffde[0].xptr.disk: 0 ; 0x4a4: 0x0000

kfffde[0].xptr.flags: 0 ; 0x4a6: L=0 E=0 D=0 S=0

kfffde[0].xptr.chk: 40 ; 0x4a7: 0x28

kfffde[1].xptr.au: 34 ; 0x4a8: 0x00000022

kfffde[1].xptr.disk: 2 ; 0x4ac: 0x0002

kfffde[1].xptr.flags: 0 ; 0x4ae: L=0 E=0 D=0 S=0

kfffde[1].xptr.chk: 10 ; 0x4af: 0x0a

从上面可以看到，就位于au 2中，而我们的file 6，自然也就在block 6中，如下：

1. 首先需要找到asm alias信息，在第二个au，第6个块里面

[root@node1 grid]# kfed read /dev/raw/raw5 aun=2 blkn=6|grep au|more

kfffde[0].xptr.au: 18 ; 0x4a0: 0x00000012 ++在第18个au里面

kfffde[1].xptr.au: 4294967295 ; 0x4a8: 0xffffffff

kfffde[2].xptr.au: 4294967295 ; 0x4b0: 0xffffffff

kfffde[3].xptr.au: 4294967295 ; 0x4b8: 0xffffffff

kfffde[4].xptr.au: 4294967295 ; 0x4c0: 0xffffffff

下面继续读取au 18 得到 alias_dir，如下：

[root@node1 grid]# kfed read /dev/raw/raw5 aun=18 blkn=1|more
kfbh.endian:                          1 ; 0x000: 0x01
kfbh.hard:                          130 ; 0x001: 0x82
kfbh.type:                           11 ; 0x002: KFBTYP_ALIASDIR
kfbh.datfmt:                          1 ; 0x003: 0x01
kfbh.block.blk:                       1 ; 0x004: blk=1
kfbh.block.obj:                       6 ; 0x008: file=6
kfbh.check:                  1879851315 ; 0x00c: 0x700c4133
kfbh.fcn.base:                     2582 ; 0x010: 0x00000a16
kfbh.fcn.wrap:                        0 ; 0x014: 0x00000000
kfbh.spare1:                          0 ; 0x018: 0x00000000
kfbh.spare2:                          0 ; 0x01c: 0x00000000
kffdnd.bnode.incarn:                  1 ; 0x000: A=1 NUMM=0x0
kffdnd.bnode.frlist.number: 4294967295 ; 0x004: 0xffffffff
kffdnd.bnode.frlist.incarn:           0 ; 0x008: A=0 NUMM=0x0
kffdnd.overfl.number:        4294967295 ; 0x00c: 0xffffffff
kffdnd.overfl.incarn:                 0 ; 0x010: A=0 NUMM=0x0
kffdnd.parent.number:                 0 ; 0x014: 0x00000000
kffdnd.parent.incarn:                 1 ; 0x018: A=1 NUMM=0x0
kffdnd.fstblk.number:                 1 ; 0x01c: 0x00000001
kffdnd.fstblk.incarn:                 1 ; 0x020: A=1 NUMM=0x0
kfade[0].entry.incarn:                1 ; 0x024: A=1 NUMM=0x0
kfade[0].entry.hash:         4053320104 ; 0x028: 0xf198c1a8
kfade[0].entry.refer.number:          2 ; 0x02c: 0x00000002
kfade[0].entry.refer.incarn:          1 ; 0x030: A=1 NUMM=0x0
kfade[0].name:              CONTROLFILE ; 0x034: length=11
kfade[0].fnum:               4294967295 ; 0x064: 0xffffffff
kfade[0].finc:               4294967295 ; 0x068: 0xffffffff
kfade[0].flags:                       4 ; 0x06c: U=0 S=0 S=1 U=0 F=0
kfade[0].ub1spare:                    0 ; 0x06d: 0x00
kfade[0].ub2spare:                    0 ; 0x06e: 0x0000
kfade[1].entry.incarn:                1 ; 0x070: A=1 NUMM=0x0
kfade[1].entry.hash:         2803485489 ; 0x074: 0xa719cb31
kfade[1].entry.refer.number:          3 ; 0x078: 0x00000003
kfade[1].entry.refer.incarn:          1 ; 0x07c: A=1 NUMM=0x0
kfade[1].name:                ONLINELOG ; 0x080: length=9
kfade[1].fnum:               4294967295 ; 0x0b0: 0xffffffff
kfade[1].finc:               4294967295 ; 0x0b4: 0xffffffff
kfade[1].flags:                       4 ; 0x0b8: U=0 S=0 S=1 U=0 F=0
kfade[1].ub1spare:                    0 ; 0x0b9: 0x00
kfade[1].ub2spare:                    0 ; 0x0ba: 0x0000
kfade[2].entry.incarn:                1 ; 0x0bc: A=1 NUMM=0x0
kfade[2].entry.hash:          710518681 ; 0x0c0: 0x2a59a799
kfade[2].entry.refer.number:          4 ; 0x0c4: 0x00000004
kfade[2].entry.refer.incarn:          1 ; 0x0c8: A=1 NUMM=0x0
kfade[2].name:                 DATAFILE ; 0x0cc: length=8
kfade[2].fnum:               4294967295 ; 0x0fc: 0xffffffff
kfade[2].finc:               4294967295 ; 0x100: 0xffffffff
kfade[2].flags:                       4 ; 0x104: U=0 S=0 S=1 U=0 F=0
kfade[2].ub1spare:                    0 ; 0x105: 0x00
kfade[2].ub2spare:                    0 ; 0x106: 0x0000
kfade[3].entry.incarn:                1 ; 0x108: A=1 NUMM=0x0
kfade[3].entry.hash:         2905271101 ; 0x10c: 0xad2aeb3d
kfade[3].entry.refer.number:          5 ; 0x110: 0x00000005
kfade[3].entry.refer.incarn:          1 ; 0x114: A=1 NUMM=0x0
kfade[3].name:                 TEMPFILE ; 0x118: length=8
kfade[3].fnum:               4294967295 ; 0x148: 0xffffffff
kfade[3].finc:               4294967295 ; 0x14c: 0xffffffff
kfade[3].flags:                       4 ; 0x150: U=0 S=0 S=1 U=0 F=0
kfade[3].ub1spare:                    0 ; 0x151: 0x00
kfade[3].ub2spare:                    0 ; 0x152: 0x0000
kfade[4].entry.incarn:                1 ; 0x154: A=1 NUMM=0x0
kfade[4].entry.hash:         3261836913 ; 0x158: 0xc26bae71
kfade[4].entry.refer.number:          6 ; 0x15c: 0x00000006
kfade[4].entry.refer.incarn:          1 ; 0x160: A=1 NUMM=0x0
kfade[4].name:            PARAMETERFILE ; 0x164: length=13
kfade[4].fnum:               4294967295 ; 0x194: 0xffffffff
kfade[4].finc:               4294967295 ; 0x198: 0xffffffff
kfade[4].flags:                       4 ; 0x19c: U=0 S=0 S=1 U=0 F=0
kfade[4].ub1spare:                    0 ; 0x19d: 0x00
kfade[4].ub2spare:                    0 ; 0x19e: 0x0000
kfade[5].entry.incarn:                1 ; 0x1a0: A=1 NUMM=0x0
kfade[5].entry.hash:         2413283393 ; 0x1a4: 0x8fd7c841
kfade[5].entry.refer.number: 4294967295 ; 0x1a8: 0xffffffff
kfade[5].entry.refer.incarn:          0 ; 0x1ac: A=0 NUMM=0x0
kfade[5].name:           spfilenode.ora ; 0x1b0: length=14
kfade[5].fnum:                      267 ; 0x1e0: 0x0000010b
kfade[5].finc:                914425797 ; 0x1e4: 0x368107c5
kfade[5].flags:                      17 ; 0x1e8: U=1 S=0 S=0 U=0 F=1
kfade[5].ub1spare:                    0 ; 0x1e9: 0x00
kfade[5].ub2spare:                    0 ; 0x1ea: 0x0000
kfade[6].entry.incarn:                0 ; 0x1ec: A=0 NUMM=0x0
kfade[6].entry.hash:                  0 ; 0x1f0: 0x00000000
kfade[6].entry.refer.number:          0 ; 0x1f4: 0x00000000
kfade[6].entry.refer.incarn:          0 ; 0x1f8: A=0 NUMM=0x0
kfade[6].name:                          ; 0x1fc: length=0
....省略部分内容

换句话说，我要定位所有的数据文件的名称，应该是第几4个？
kfade[2] 明显，是这个，数据文件的别名
看到它在哪个块里面？第四个 entry.refer.number: 4 ; 0x0c4: 0x00000004

++++定位datafile信息
[root@node1 grid]# kfed read /dev/raw/raw5 aun=18 blkn=4|more

kfbh.endian: 1 ; 0x000: 0x01

kfbh.hard: 130 ; 0x001: 0x82

kfbh.type: 11 ; 0x002: KFBTYP_ALIASDIR

kfbh.datfmt: 1 ; 0x003: 0x01

kfbh.block.blk: 4 ; 0x004: blk=4

kfbh.block.obj: 6 ; 0x008: file=6

kfbh.check: 248374297 ; 0x00c: 0x0ecde419

kfbh.fcn.base: 2452 ; 0x010: 0x00000994

kfbh.fcn.wrap: 0 ; 0x014: 0x00000000

kfbh.spare1: 0 ; 0x018: 0x00000000

kfbh.spare2: 0 ; 0x01c: 0x00000000

kffdnd.bnode.incarn: 1 ; 0x000: A=1 NUMM=0x0

kffdnd.bnode.frlist.number: 4294967295 ; 0x004: 0xffffffff

kffdnd.bnode.frlist.incarn: 0 ; 0x008: A=0 NUMM=0x0

kffdnd.overfl.number: 4294967295 ; 0x00c: 0xffffffff

kffdnd.overfl.incarn: 0 ; 0x010: A=0 NUMM=0x0

kffdnd.parent.number: 1 ; 0x014: 0x00000001

kffdnd.parent.incarn: 1 ; 0x018: A=1 NUMM=0x0

kffdnd.fstblk.number: 4 ; 0x01c: 0x00000004

kffdnd.fstblk.incarn: 1 ; 0x020: A=1 NUMM=0x0

kfade[0].entry.incarn: 1 ; 0x024: A=1 NUMM=0x0

kfade[0].entry.hash: 2028115485 ; 0x028: 0x78e2961d

kfade[0].entry.refer.number: 4294967295 ; 0x02c: 0xffffffff

kfade[0].entry.refer.incarn: 0 ; 0x030: A=0 NUMM=0x0

kfade[0].name: SYSTEM ; 0x034: length=6

kfade[0].fnum: 259 ; 0x064: 0x00000103

kfade[0].finc: 914424923 ; 0x068: 0x3681045b

kfade[0].flags: 18 ; 0x06c: U=0 S=1 S=0 U=0 F=1

kfade[0].ub1spare: 0 ; 0x06d: 0x00

kfade[0].ub2spare: 0 ; 0x06e: 0x0000

kfade[1].entry.incarn: 1 ; 0x070: A=1 NUMM=0x0

kfade[1].entry.hash: 3544811593 ; 0x074: 0xd3498849

kfade[1].entry.refer.number: 4294967295 ; 0x078: 0xffffffff

kfade[1].entry.refer.incarn: 0 ; 0x07c: A=0 NUMM=0x0

kfade[1].name: SYSAUX ; 0x080: length=6

kfade[1].fnum: 260 ; 0x0b0: 0x00000104

kfade[1].finc: 914424953 ; 0x0b4: 0x36810479

kfade[1].flags: 18 ; 0x0b8: U=0 S=1 S=0 U=0 F=1

kfade[1].ub1spare: 0 ; 0x0b9: 0x00

kfade[1].ub2spare: 0 ; 0x0ba: 0x0000

kfade[2].entry.incarn: 1 ; 0x0bc: A=1 NUMM=0x0

kfade[2].entry.hash: 3368496939 ; 0x0c0: 0xc8c72f2b

kfade[2].entry.refer.number: 4294967295 ; 0x0c4: 0xffffffff

kfade[2].entry.refer.incarn: 0 ; 0x0c8: A=0 NUMM=0x0

kfade[2].name: UNDOTBS1 ; 0x0cc: length=8

kfade[2].fnum: 261 ; 0x0fc: 0x00000105

kfade[2].finc: 914424977 ; 0x100: 0x36810491

kfade[2].flags: 18 ; 0x104: U=0 S=1 S=0 U=0 F=1

kfade[2].ub1spare: 0 ; 0x105: 0x00

kfade[2].ub2spare: 0 ; 0x106: 0x0000

kfade[3].entry.incarn: 1 ; 0x108: A=1 NUMM=0x0

kfade[3].entry.hash: 2459924295 ; 0x10c: 0x929f7747

kfade[3].entry.refer.number: 4294967295 ; 0x110: 0xffffffff

kfade[3].entry.refer.incarn: 0 ; 0x114: A=0 NUMM=0x0

kfade[3].name: UNDOTBS2 ; 0x118: length=8

kfade[3].fnum: 263 ; 0x148: 0x00000107

kfade[3].finc: 914424999 ; 0x14c: 0x368104a7

kfade[3].flags: 18 ; 0x150: U=0 S=1 S=0 U=0 F=1

kfade[3].ub1spare: 0 ; 0x151: 0x00

kfade[3].ub2spare: 0 ; 0x152: 0x0000

kfade[4].entry.incarn: 1 ; 0x154: A=1 NUMM=0x0

kfade[4].entry.hash: 1930335742 ; 0x158: 0x730e95fe

kfade[4].entry.refer.number: 4294967295 ; 0x15c: 0xffffffff

kfade[4].entry.refer.incarn: 0 ; 0x160: A=0 NUMM=0x0

kfade[4].name: USERS ; 0x164: length=5

kfade[4].fnum: 264 ; 0x194: 0x00000108

kfade[4].finc: 914425007 ; 0x198: 0x368104af

kfade[4].flags: 18 ; 0x19c: U=0 S=1 S=0 U=0 F=1

kfade[4].ub1spare: 0 ; 0x19d: 0x00

kfade[4].ub2spare: 0 ; 0x19e: 0x0000

... ...

++++定位控制文件

control的alias信息应该在block 2中：

[root@node1 grid]# kfed read /dev/raw/raw5 aun=18 blkn=2|more

kfbh.endian: 1 ; 0x000: 0x01

kfbh.hard: 130 ; 0x001: 0x82

kfbh.type: 11 ; 0x002: KFBTYP_ALIASDIR

kfbh.datfmt: 1 ; 0x003: 0x01

kfbh.block.blk: 2 ; 0x004: blk=2

kfbh.block.obj: 6 ; 0x008: file=6

kfbh.check: 1012261824 ; 0x00c: 0x3c55e3c0

kfbh.fcn.base: 529 ; 0x010: 0x00000211

kfbh.fcn.wrap: 0 ; 0x014: 0x00000000

kfbh.spare1: 0 ; 0x018: 0x00000000

kfbh.spare2: 0 ; 0x01c: 0x00000000

kffdnd.bnode.incarn: 1 ; 0x000: A=1 NUMM=0x0

kffdnd.bnode.frlist.number: 4294967295 ; 0x004: 0xffffffff

kffdnd.bnode.frlist.incarn: 0 ; 0x008: A=0 NUMM=0x0

kffdnd.overfl.number: 4294967295 ; 0x00c: 0xffffffff

kffdnd.overfl.incarn: 0 ; 0x010: A=0 NUMM=0x0

kffdnd.parent.number: 1 ; 0x014: 0x00000001

kffdnd.parent.incarn: 1 ; 0x018: A=1 NUMM=0x0

kffdnd.fstblk.number: 2 ; 0x01c: 0x00000002

kffdnd.fstblk.incarn: 1 ; 0x020: A=1 NUMM=0x0

kfade[0].entry.incarn: 1 ; 0x024: A=1 NUMM=0x0

kfade[0].entry.hash: 2250670667 ; 0x028: 0x8626824b

kfade[0].entry.refer.number: 4294967295 ; 0x02c: 0xffffffff

kfade[0].entry.refer.incarn: 0 ; 0x030: A=0 NUMM=0x0

kfade[0].name: Current ; 0x034: length=7

kfade[0].fnum: 256 ; 0x064: 0x00000100

kfade[0].finc: 914424919 ; 0x068: 0x36810457

kfade[0].flags: 18 ; 0x06c: U=0 S=1 S=0 U=0 F=1

kfade[0].ub1spare: 0 ; 0x06d: 0x00

kfade[0].ub2spare: 0 ; 0x06e: 0x0000

kfade[1].entry.incarn: 0 ; 0x070: A=0 NUMM=0x0

kfade[1].entry.hash: 0 ; 0x074: 0x00000000

kfade[1].entry.refer.number: 0 ; 0x078: 0x00000000

kfade[1].entry.refer.incarn: 0 ; 0x07c: A=0 NUMM=0x0

kfade[1].name: ; 0x080: length=0

kfade[1].fnum: 0 ; 0x0b0: 0x00000000

kfade[1].finc: 0 ; 0x0b4: 0x00000000

kfade[1].flags: 0 ; 0x0b8: U=0 S=0 S=0 U=0 F=0

--More--

从上面信息，你可以知道目前数据库的controlfile名称为：Current.256.914424919

++++++ Redo logfile

[root@node1 grid]# kfed read /dev/raw/raw5 aun=18 blkn=3|more

kfbh.endian: 1 ; 0x000: 0x01

kfbh.hard: 130 ; 0x001: 0x82

kfbh.type: 11 ; 0x002: KFBTYP_ALIASDIR

kfbh.datfmt: 1 ; 0x003: 0x01

kfbh.block.blk: 3 ; 0x004: blk=3

kfbh.block.obj: 6 ; 0x008: file=6

kfbh.check: 1576130540 ; 0x00c: 0x5df1d7ec

kfbh.fcn.base: 2570 ; 0x010: 0x00000a0a

kfbh.fcn.wrap: 0 ; 0x014: 0x00000000

kfbh.spare1: 0 ; 0x018: 0x00000000

kfbh.spare2: 0 ; 0x01c: 0x00000000

kffdnd.bnode.incarn: 1 ; 0x000: A=1 NUMM=0x0

kffdnd.bnode.frlist.number: 4294967295 ; 0x004: 0xffffffff

kffdnd.bnode.frlist.incarn: 0 ; 0x008: A=0 NUMM=0x0

kffdnd.overfl.number: 4294967295 ; 0x00c: 0xffffffff

kffdnd.overfl.incarn: 0 ; 0x010: A=0 NUMM=0x0

kffdnd.parent.number: 1 ; 0x014: 0x00000001

kffdnd.parent.incarn: 1 ; 0x018: A=1 NUMM=0x0

kffdnd.fstblk.number: 3 ; 0x01c: 0x00000003

kffdnd.fstblk.incarn: 1 ; 0x020: A=1 NUMM=0x0

kfade[0].entry.incarn: 1 ; 0x024: A=1 NUMM=0x0

kfade[0].entry.hash: 3190029926 ; 0x028: 0xbe23fe66

kfade[0].entry.refer.number: 4294967295 ; 0x02c: 0xffffffff

kfade[0].entry.refer.incarn: 0 ; 0x030: A=0 NUMM=0x0

kfade[0].name: group_1 ; 0x034: length=7

kfade[0].fnum: 257 ; 0x064: 0x00000101

kfade[0].finc: 914424919 ; 0x068: 0x36810457

kfade[0].flags: 18 ; 0x06c: U=0 S=1 S=0 U=0 F=1

kfade[0].ub1spare: 0 ; 0x06d: 0x00

kfade[0].ub2spare: 0 ; 0x06e: 0x0000

kfade[1].entry.incarn: 1 ; 0x070: A=1 NUMM=0x0

kfade[1].entry.hash: 3903645932 ; 0x074: 0xe8ace8ec

kfade[1].entry.refer.number: 4294967295 ; 0x078: 0xffffffff

kfade[1].entry.refer.incarn: 0 ; 0x07c: A=0 NUMM=0x0

kfade[1].name: group_2 ; 0x080: length=7

kfade[1].fnum: 258 ; 0x0b0: 0x00000102

kfade[1].finc: 914424921 ; 0x0b4: 0x36810459

kfade[1].flags: 18 ; 0x0b8: U=0 S=1 S=0 U=0 F=1

kfade[1].ub1spare: 0 ; 0x0b9: 0x00

kfade[1].ub2spare: 0 ; 0x0ba: 0x0000

kfade[2].entry.incarn: 1 ; 0x0bc: A=1 NUMM=0x0

kfade[2].entry.hash: 2444788509 ; 0x0c0: 0x91b8831d

kfade[2].entry.refer.number: 4294967295 ; 0x0c4: 0xffffffff

kfade[2].entry.refer.incarn: 0 ; 0x0c8: A=0 NUMM=0x0

kfade[2].name: group_3 ; 0x0cc: length=7

kfade[2].fnum: 265 ; 0x0fc: 0x00000109

kfade[2].finc: 914425791 ; 0x100: 0x368107bf

kfade[2].flags: 18 ; 0x104: U=0 S=1 S=0 U=0 F=1

kfade[2].ub1spare: 0 ; 0x105: 0x00

kfade[2].ub2spare: 0 ; 0x106: 0x0000

kfade[3].entry.incarn: 1 ; 0x108: A=1 NUMM=0x0

kfade[3].entry.hash: 2613692934 ; 0x10c: 0x9bc9ca06

kfade[3].entry.refer.number: 4294967295 ; 0x110: 0xffffffff

kfade[3].entry.refer.incarn: 0 ; 0x114: A=0 NUMM=0x0

kfade[3].name: group_4 ; 0x118: length=7

kfade[3].fnum: 266 ; 0x148: 0x0000010a

kfade[3].finc: 914425793 ; 0x14c: 0x368107c1

kfade[3].flags: 18 ; 0x150: U=0 S=1 S=0 U=0 F=1

kfade[3].ub1spare: 0 ; 0x151: 0x00

kfade[3].ub2spare: 0 ; 0x152: 0x0000

从上面信息，可以知道目前该数据库有4组redo，每组1个logfile，如下：

group_1.257.914424919

group_2.258.914424921

group_3.265.914425791

group_4.266.914425793

++++++spfile

找到spfile的alias信息如下：

[root@node1 grid]# kfed read /dev/raw/raw5 aun=18 blkn=6|more

kfbh.endian: 1 ; 0x000: 0x01

kfbh.hard: 130 ; 0x001: 0x82

kfbh.type: 11 ; 0x002: KFBTYP_ALIASDIR

kfbh.datfmt: 1 ; 0x003: 0x01

kfbh.block.blk: 6 ; 0x004: blk=6

kfbh.block.obj: 6 ; 0x008: file=6

kfbh.check: 1131672550 ; 0x00c: 0x4373f3e6

kfbh.fcn.base: 2581 ; 0x010: 0x00000a15

kfbh.fcn.wrap: 0 ; 0x014: 0x00000000

kfbh.spare1: 0 ; 0x018: 0x00000000

kfbh.spare2: 0 ; 0x01c: 0x00000000

kffdnd.bnode.incarn: 1 ; 0x000: A=1 NUMM=0x0

kffdnd.bnode.frlist.number: 4294967295 ; 0x004: 0xffffffff

kffdnd.bnode.frlist.incarn: 0 ; 0x008: A=0 NUMM=0x0

kffdnd.overfl.number: 4294967295 ; 0x00c: 0xffffffff

kffdnd.overfl.incarn: 0 ; 0x010: A=0 NUMM=0x0

kffdnd.parent.number: 1 ; 0x014: 0x00000001

kffdnd.parent.incarn: 1 ; 0x018: A=1 NUMM=0x0

kffdnd.fstblk.number: 6 ; 0x01c: 0x00000006

kffdnd.fstblk.incarn: 1 ; 0x020: A=1 NUMM=0x0

kfade[0].entry.incarn: 1 ; 0x024: A=1 NUMM=0x0

kfade[0].entry.hash: 3797981129 ; 0x028: 0xe26097c9

kfade[0].entry.refer.number: 4294967295 ; 0x02c: 0xffffffff

kfade[0].entry.refer.incarn: 0 ; 0x030: A=0 NUMM=0x0

kfade[0].name: spfile ; 0x034: length=6

kfade[0].fnum: 267 ; 0x064: 0x0000010b

kfade[0].finc: 914425797 ; 0x068: 0x368107c5

kfade[0].flags: 18 ; 0x06c: U=0 S=1 S=0 U=0 F=1

kfade[0].ub1spare: 0 ; 0x06d: 0x00

kfade[0].ub2spare: 0 ; 0x06e: 0x0000

可以看到spfile的全称为spfile.267.914425797

下面开始抽取：
--extrace spfile

[grid@node1 ~]$ amdu -dis '/dev/raw/raw*' -extract datadg01.267 -output spfile

amdu_2016_06_14_14_55_06/

[grid@node1 ~]$

[grid@node1 ~]$ ls

amdu_2016_06_14_14_55_06 spfile

可以看到spfile已经被拷出来了

查看控制文件内容

[grid@node1 ~]$ strings spfile

node2.__db_cache_size=268435456

node1.__db_cache_size=276824064

node2.__java_pool_size=4194304

node1.__java_pool_size=4194304

node2.__large_pool_size=4194304

node1.__large_pool_size=4194304

node2.__oracle_base='/u01/app/oracle'#ORACLE_BASE set from environment

node1.__oracle_base='/u01/app/oracle'#ORACLE_BASE set from environment

node2.__pga_aggregate_target=339738624

node1.__pga_aggregate_target=339738624

node2.__sga_target=503316480

node1.__sga_target=503316480

node2.__shared_io_po

ol_size=0

node1.__shared_io_pool_size=0

node2.__shared_pool_size=218103808

node1.__shared_pool_size=209715200

node2.__streams_pool_size=0

node1.__streams_pool_size=0

*.audit_file_dest='/u01/app/oracle/admin/node/adump'

*.audit_trail='db'

*.cluster_database=true

*.compatible='11.2.0.4.0'

*.control_files='+DATADG01/node/controlfile/current.256.914424919'

*.db_block_size=8192

*.db_create_file_dest='+DATADG01'

*.db_domain=''

*.db_name='node'

*.diagnostic_dest='/u01/app/oracle'

node1.inst

ance_number=1

node2.instance_number=2

*.memory_target=842006528

*.open_cursors=300

*.processes=150

*.remote_listener='scanip:1521'

*.remote_login_passwordfile='exclusive'

node2.thread=2

node1.thread=1

node1.undo_tablespace='UNDOTBS1'

node2.undo_tablespace='UNDOTBS2'

--extrace controlfile

[grid@node1 ~]$ amdu -dis '/dev/raw/raw*' -nodir -norep -extract datadg01.256 -output control01.ctl

--extract datafile

[grid@node1 ~]$ -dis '/dev/raw/raw*' -nodir -norep -extract datadg01.264 -output users.dbf

[grid@node1 ~]$ amdu -dis '/dev/raw/raw*' -nodir -norep -extract datadg01.263 -output undotbs2.dbf

[grid@node1 ~]$ amdu -dis '/dev/raw/raw*' -nodir -norep -extract datadg01.261 -output undotbs1.dbf

[grid@node1 ~]$ amdu -dis '/dev/raw/raw*' -nodir -norep -extract datadg01.260 -output sysaux.dbf

[grid@node1 ~]$ amdu -dis '/dev/raw/raw*' -nodir -norep -extract datadg01.259 -output system.dbf

[grid@node1 ~]$ ll -sh *.dbf

601M -rw-r--r-- 1 grid oinstall 601M Jun 14 15:21 sysaux.dbf

701M -rw-r--r-- 1 grid oinstall 701M Jun 14 15:22 system.dbf

201M -rw-r--r-- 1 grid oinstall 201M Jun 14 15:20 undotbs1.dbf

201M -rw-r--r-- 1 grid oinstall 201M Jun 14 15:20 undotbs2.dbf

5.1M -rw-r--r-- 1 grid oinstall 5.1M Jun 14 15:19 users.dbf

--extract redo logfile

[grid@node1 ~]$ amdu -dis '/dev/raw/raw*' -nodir -norep -extract datadg01.257 -output redo01.log

[grid@node1 ~]$ amdu -dis '/dev/raw/raw*' -nodir -norep -extract datadg01.258 -output redo02.log

[grid@node1 ~]$ amdu -dis '/dev/raw/raw*' -nodir -norep -extract datadg01.265 -output redo03.log

[grid@node1 ~]$ amdu -dis '/dev/raw/raw*' -nodir -norep -extract datadg01.266 -output redo04.log

[grid@node1 ~]$ ll -sh *.log

51M -rw-r--r-- 1 grid oinstall 51M Jun 14 15:24 redo01.log

51M -rw-r--r-- 1 grid oinstall 51M Jun 14 15:25 redo02.log

51M -rw-r--r-- 1 grid oinstall 51M Jun 14 15:26 redo03.log

51M -rw-r--r-- 1 grid oinstall 51M Jun 14 15:26 redo04.log

验证一下有没有坏块

[grid@node1 ~]$ dbv file=system.dbf

DBVERIFY: Release 11.2.0.4.0 - Production on Tue Jun 14 15:27:24 2016

DBVERIFY - Verification starting : FILE = /home/grid/system.dbf

DBVERIFY - Verification complete

Total Pages Examined : 89600

Total Pages Processed (Data) : 15658

Total Pages Failing (Data) : 0

Total Pages Processed (Index): 4851

Total Pages Failing (Index): 0

Total Pages Processed (Other): 3065

Total Pages Processed (Seg) : 1

Total Pages Failing (Seg) : 0

Total Pages Empty : 66026

Total Pages Marked Corrupt : 0

Total Pages Influx : 0

Total Pages Encrypted : 0

Highest block SCN : 376278 (0.376278)

可以看到文件状态正常