ASMCMD-9521: AFD is already configured

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ASMCMD-9521: AFD is already configured while labeling the disk

#export ORACLE_HOME=/u01/app/product/19c/grid

#export ORACLE_BASE=/u01/app

# $ORACLE_HOME/bin/asmcmd afd_label FRA_01_RAC_001 /dev/dm-10 --init

ASMCMD-9521: AFD is already configured

After checking the disk status I found the disk is available to lable

#$ORACLE_HOME/bin/asmcmd afd_lslbl /dev/dm-10

No devices to be scanned.

The Permission is also fine

# ls -lrt /dev/dm-10

lrwxrwxrwx 1 root root 8 Sep 28 10:19 /dev/dm-10

Lets read the header of this disk

# $ORACLE_HOME/bin/kfed read /dev/dm-10

kfbh.endian: 0 ; 0x000: 0x00

kfbh.hard: 0 ; 0x001: 0x00

kfbh.type: 0 ; 0x002: KFBTYP_INVALID

kfbh.datfmt: 0 ; 0x003: 0x00

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

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

kfbh.check: 0 ; 0x00c: 0x00000000

kfbh.fcn.base: 0 ; 0x010: 0x00000000

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

kfbh.spare1: 0 ; 0x018: 0x00000000

kfbh.spare2: 0 ; 0x01c: 0x00000000

000000000 00000000 00000000 00000000 00000000 [................]

Repeat 255 times

KFED-00322: invalid content encountered during block traversal: [kfbtTraverseBlock][Invalid OSM block type][][0]

So it seems the disk assigned to the server is not a clean disk

Solution:

# $ORACLE_HOME/bin/asmcmd afd_label FRA_01_RAC_001 /dev/dm-10

# $ORACLE_HOME/bin/asmcmd afd_label FRA_01_RAC_001 /dev/dm-10 --migrate

#dd if=/dev/zero of=/dev/dm-10 bs=4M count 10

# $ORACLE_HOME/bin/asmcmd afd_label FRA_01_RAC_001 /dev/dm-10 --init

# $ORACLE_HOME/bin/asmcmd afd_lslbl /dev/dm-10

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

Label Duplicate Path

================================================================================

FRA_01_RAC_001 /dev/dm-10

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