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asm spfile

The below article useful to know about asm spfile and How asm instance started if spfile in diskgroup without mount.

http://asmsupportguy.blogspot.in/2014/03/asm-spfile-in-disk-group.html

This article he explained for  normal redundancy . If you want to find the spfile on external redundancy level, you can use below command

[oracle@asmoracle ~]$ asmcmd lsdsk -G DATA
Path
/dev/oracleasm/disks/DISK1
/dev/oracleasm/disks/DISK2


[oracle@asmoracle ~]$ kfed read /dev/oracleasm/disks/DISK1 | grep -E 'spf|ausize'
kfdhdb.ausize: 1048576 ; 0x0bc: 0x00100000
kfdhdb.spfile: 1450 ; 0x0f4: 0x000005aa
kfdhdb.spfflg: 1 ; 0x0f8: 0x00000001

[oracle@asmoracle ~]$ kfed read /dev/oracleasm/disks/DISK2 | grep -E 'spf|ausize'
kfdhdb.ausize: 1048576 ; 0x0bc: 0x00100000
kfdhdb.spfile: 0 ; 0x0f4: 0x00000000
kfdhdb.spfflg: 0 ; 0x0f8: 0x00000000
[oracle@asmoracle ~]$ dd if=/dev/oracleasm/disks/DISK1 bs=1048576 skip=1450 count=1 | strings
+ASM.__large_pool_size=16777216
+ASM.__oracle_base='/u01/app/oracle'#ORACLE_BASE set from in memory value
+ASM.asm_diskgroups='DATA','FRA'#Manual Mount
*.asm_diskstring='/dev/oracleasm/disks/*'
*.asm_power_limit=1
*.diagnostic_dest='/u01/app/oracle'
*.instance_type='asm'
*.large_pool_size=12M
*.processes=300
*.remote_login_passwordfile='EXCLUSIVE'
1+0 records in
1+0 records out
1048576 bytes (1.0 MB) copied, 0.054056 seconds, 19.4 MB/s
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