Storage Management (ASM ACFS DNFS ODM) (MOSC)

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Is it possible to undo disk deletion?

edited Feb 22, 2019 11:45AM in Storage Management (ASM ACFS DNFS ODM) (MOSC) 8 commentsAnswered

Hi

I accidentally deleted all asm disks by many commands

oracleasm deletedisk

The disks group were mounted. Database was opened and used the disks.

I recreated the disks with the same names.

oracleasm createdisk 

But ASM does not show disks groups.

select * from v$asm_group;

not rows returned

and the disks headers is invalid.

>kfed read /dev/oracleasm/disks/ASM001|more

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:                  3676050122 ; 0x00c: 0xdb1c12ca

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

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