kfed... 11g tool

kfed utility was built on 11G... If using 10gR2 above, that can built:

$ cd $ORACLE_HOME/rdbms/lib

$ make -f ins_rdbms.mk ikfed 

Linking KFED utility (kfed)

rm -f $ORACLE_HOME/rdbms/lib/kfed

gcc -o $ORACLE_HOME/rdbms/lib/kfed -L$ORACLE_HOME/rdbms/lib/ -L$ORACLE_HOME/lib/ -L$ORACLE_HOME/lib/stubs/  $ORACLE_HOME/lib/s0main.o $ORACLE_HOME/rdbms/lib/sskfeded.o $ORACLE_HOME/rdbms/lib/skfedpt.o  $ORACLE_HOME/rdbms/lib/defopt.o -ldbtools10 -lclntsh  `cat $ORACLE_HOME/lib/ldflags`    -lnsslb10 -lncrypt10 -lnsgr10 -lnzjs10 -ln10 -lnnz10 -lnl10 -lnro10 `cat $ORACLE_HOME/lib/ldflags`    -lnsslb10 -lncrypt10 -lnsgr10 -lnzjs10 -ln10 -lnnz10 -lnl10 -lclient10 -lnnetd10  -lvsn10 -lcommon10 -lgeneric10 -lmm -lsnls10 -lnls10  -lcore10 -lsnls10 -lnls10 -lcore10 -lsnls10 -lnls10 -lxml10 -lcore10 -lunls10 -lsnls10 -lnls10 -lcore10 -lnls10 `cat $ORACLE_HOME/lib/ldflags`    -lnsslb10 -lncrypt10 -lnsgr10 -lnzjs10 -ln10 -lnnz10 -lnl10 -lnro10 `cat $ORACLE_HOME/lib/ldflags`    -lnsslb10 -lncrypt10 -lnsgr10 -lnzjs10 -ln10 -lnnz10 -lnl10 -lclient10 -lnnetd10  -lvsn10 -lcommon10 -lgeneric10   -lsnls10 -lnls10  -lcore10 -lsnls10 -lnls10 -lcore10 -lsnls10 -lnls10 -lxml10 -lcore10 -lunls10 -lsnls10 -lnls10 -lcore10 -lnls10 -lclient10 -lnnetd10  -lvsn10 -lcommon10 -lgeneric10 -lsnls10 -lnls10  -lcore10 -lsnls10 -lnls10 -lcore10 -lsnls10 -lnls10 -lxml10 -lcore10 -lunls10 -lsnls10 -lnls10 -lcore10 -lnls10   `cat $ORACLE_HOME/lib/sysliblist` -Wl,-rpath,$ORACLE_HOME/lib -lm    `cat $ORACLE_HOME/lib/sysliblist` -ldl -lm   -L$ORACLE_HOME/lib

mv -f $ORACLE_HOME/bin/kfed $ORACLE_HOME/bin/kfedO

mv: cannot stat `$ORACLE_HOME/bin/kfed': No such file or directory

make: [ikfed] Error 1 (ignored)

mv $ORACLE_HOME/rdbms/lib/kfed $ORACLE_HOME/bin/kfed

chmod 751 $ORACLE_HOME/bin/kfed

$ kfed -h

as/mlib         ASM Library [asmlib='lib']

aun/um          AU number to examine or update [AUNUM=number]

aus/z           Allocation Unit size in bytes [AUSZ=number]

blkn/um         Block number to examine or update [BLKNUM=number]

blks/z          Metadata block size in bytes [BLKSZ=number]

ch/ksum         Update checksum before each write [CHKSUM=YES/NO]

cn/t            Count of AUs to process [CNT=number]

d/ev            ASM device to examine or update [DEV=string]

o/p             KFED operation type [OP=READ/WRITE/MERGE/REPAIR/NEW/FORM/FIND/STRUCT]

p/rovnm         Name for provisioning purposes [PROVNM=string]

s/eek           AU number to seek to [SEEK=number]

te/xt           File name for translated block text [TEXT=string]

ty/pe           ASM metadata block type number [TYPE=number]

KFED, that can edit contents of ASM blocks and get informations about ASM.

If using ASMLIB:

$ cd /dev/oracleasm/disks/

$ ls

DATA1

$ kfed read DATA1 

.

.

.

kfdhdb.grptyp:                        1 ; 0x026: KFDGTP_EXTERNAL

kfdhdb.hdrsts:                        3 ; 0x027: KFDHDR_MEMBER

kfdhdb.dskname:                    DATA1 ; 0x028: length=4

kfdhdb.grpname:                    DATA ; 0x048: length=4

kfdhdb.fgname:                     DATA1 ; 0x068: length=4

.

.

.

Disk name = DATA1 on DATA(EXTERNAL Redundancy) diskgroup.

If using RAW DEVICE:

$ kfed read /dev/raw/raw1

.

.

.

kfdhdb.dsknum:                        0 ; 0x024: 0x0000

kfdhdb.grptyp:                        1 ; 0x026: KFDGTP_EXTERNAL

kfdhdb.hdrsts:                        3 ; 0x027: KFDHDR_MEMBER

kfdhdb.dskname:              DATA1_0000 ; 0x028: length=10

kfdhdb.grpname:                   DATA1 ; 0x048: length=5

kfdhdb.fgname:               DATA1_0000 ; 0x068: length=10

.

.

.

Disk name = DATA1_0000 on DATA1(EXTERNAL Redundancy) diskgroup.

If  found,

$ kfed  read /dev/emcpowera1 

KFED-00303: unable to open file ''

$ ls -l  /dev/emcpowera1

brw-------  1 root root 120, 1 Jan 23 16:52 /dev/emcpowera1

Because "oracle" user didn't have permission on this file.

Anyway "KFED-00303: unable to open file ''" Error, that can su to "root" user and ...

# $ORACLE_HOME/bin/kfed  read /dev/emcpowera1

.

.

.

kfdhdb.dsknum:                        0 ; 0x024: 0x0000

kfdhdb.grptyp:                        1 ; 0x026: KFDGTP_EXTERNAL

kfdhdb.hdrsts:                        3 ; 0x027: KFDHDR_MEMBER

kfdhdb.dskname:                    DATA1 ; 0x028: length=4

kfdhdb.grpname:                    DATA ; 0x048: length=4

kfdhdb.fgname:                     DATA1 ; 0x068: length=4

.

.

.

If that devicename 's not member on any diskgroups, that didn't find anything:

Example:

# kfed   read /dev/emcpowerb1 

kfbh.endian:                          0 ; 0x000: 0x00

kfbh.hard:                          130 ; 0x001: 0x82

kfbh.type:                            0 ; 0x002: KFBTYP_INVALID

kfbh.datfmt:                          0 ; 0x003: 0x00

kfbh.block.blk:              4290772992 ; 0x004: T=1 NUMB=0x7fc00000

kfbh.block.obj:                       0 ; 0x008: TYPE=0x0 NUMB=0x0

kfbh.check:                           0 ; 0x00c: 0x00000000

kfbh.fcn.base:                    39657 ; 0x010: 0x00009ae9

kfbh.fcn.wrap:                     4096 ; 0x014: 0x00001000

kfbh.spare1:                      61743 ; 0x018: 0x0000f12f

kfbh.spare2:                 2054913149 ; 0x01c: 0x7a7b7c7d

Actually kfed utility's Oracle Support tool.

Perhaps can read header and then save on text file.

$ kfed op=read  dev=/dev/raw/raw1  text=/tmp/raw1.text