KFED Reports “KFBTYP_INVALID” & OS Metadata [EFI PART] In Oracle ASMLIB Disk /ASM disk Member (ASM Disk Overlapping : Scenario #1).

Posted by PDSERVICE on Apr 09, 2020 In

APPLIES TO:

Oracle Database - Enterprise Edition - Version 10.2.0.1 to 12.1.0.1 [Release 10.2 to 12.1]

Oracle Database Cloud Schema Service - Version N/A and later

Oracle Database Exadata Cloud Machine - Version N/A and later

Oracle Cloud Infrastructure - Database Service - Version N/A and later

Oracle Database Backup Service - Version N/A and later

Information in this document applies to any platform.

SYMPTOMS

1) ASM diskgroup cannot be mounted due to the next error:

SQL> alter diskgroup reco mount;

alter diskgroup reco mount

ERROR at line 1:

ORA-15032: not all alterations performed

ORA-15040: diskgroup is incomplete

ORA-15042: ASM disk "2" is missing from group number "2"

CAUSE

1) Kfed reports:

[oracle@fcomtaep2 disks]$ kfed read ASMRECO03

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

7FC18D899400 00000000 00000000 00000000 00000000 [................]

Repeat 27 times

7FC18D8995C0 FEEE0001 0001FFFF FFFF0000 00000FFF [................]

7FC18D8995D0 00000000 00000000 00000000 00000000 [................]

Repeat 1 times

7FC18D8995F0 00000000 00000000 00000000 AA550000 [..............U.]

7FC18D899600 20494645 54524150 00010000 0000005C [EFI PART....\...]

7FC18D899610 BD82BBB3 00000000 00000001 00000000 [................]

7FC18D899620 0FFFFFFF 00000000 00000022 00000000 [........".......]

7FC18D899630 0FFFFFDE 00000000 FD8857E5 42D7B49B [.........W.....B]

7FC18D899640 0901FA87 6B3DB5AA 00000002 00000000 [......=k........]

7FC18D899650 00000080 00000080 FE48EB77 00000000 [........w.H.....]

7FC18D899660 00000000 00000000 00000000 00000000 [................]

Repeat 25 times

7FC18D899800 EBD0A0A2 4433B9E5 B668C087 C79926B7 [......3D..h..&..]

7FC18D899810 5381F6DF 4626F988 0E4F468D D78D3B28 [...S..&F.FO.(;..]

7FC18D899820 000007A1 00000000 0FFFF85F 00000000 [........_.......]

7FC18D899830 00000000 00000000 00720070 006D0069 [........p.r.i.m.]

7FC18D899840 00720061 00000079 00000000 00000000 [a.r.y...........]

7FC18D899850 00000000 00000000 00000000 00000000 [................]

Repeat 186 times

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

2) Above, kfed is reporting that the “ASMRECO03” disk was overlapped by the OS, it shows “EFI PART” which is OS partition metadata:

7FC18D899600 20494645 54524150 00010000 0000005C [EFI PART....\...]

3) The underlying disks associated to the “ASMRECO03” ASMLIB disk was reformatted by root and assigned to the OS filesystem.

4) This action corrupted/destroyed the RECO diskgroup for sure.

SOLUTION

Diskgroup needs to be recreated due to the “ASMRECO03” disk was overlapped by the OS filesystem.

You are here

KFED Reports “KFBTYP_INVALID” & OS Metadata [EFI PART] In Oracle ASMLIB Disk /ASM disk Member (ASM Disk Overlapping : Scenario #1).

KFED Reports “KFBTYP_INVALID” & OS Metadata [EFI PART] In Oracle ASMLIB Disk /ASM disk Member (ASM Disk Overlapping : Scenario #1).