Diskgroups are Dismounted because Grid Disk Size Is Smaller Than Asm Disk Header Value After Resizing diskgroups (Doc ID 2652643.1)

Last updated on MARCH 25, 2020

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증상

On : RDBMS 19.6.0.0.0 version, Exadata image version 12.1.2.1.1.150316.2 Exa-STORAGE

Cell서버#6 메모리 교체 후 RECOC1 diskgroup 이 diskmount 되면서 모든 instance가 비 정상적으로 crash됨.
RECOC1 diskgroup 은 아래와 같은 Error와 함께  계속해서 mount 실패함
 

ERROR
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WARNING: group 3/0xb0b97f32 (RECOC1) disk 0: disk size(10944M) is smaller than disk header value(2739M)
NOTE: process _rbal_+asm1 (24739) initiating offline of disk 0.3916010011 (RECOC1_CD_00_INPPRODWCELADM02) with mask 0x7e[0x7f] in group 3
NOTE: initiating PST update: grp = 3, dsk = 0/0xe969921b, mask = 0x6a, op = clear
GMON updating disk modes for group 3 at 39 for pid 19, osid 24739
ERROR: Disk 0 cannot be offlined, since all the disks [0, 56] with mirrored data would be offline.
ERROR: too many offline disks in PST (grp 3)
Sat Feb 08 14:41:27 2020
NOTE: cache dismounting (not clean) group 3/0xB0B97F32 (RECOC1)
NOTE: messaging CKPT to quiesce pins Unix process pid: 88066, image: oracle@inpprodwdb01.inexpia.com (B000)
WARNING: Offline for disk RECOC1_CD_00_INPPRODWCELADM02 in mode 0x7f failed.
ERROR: ORA-15066 thrown in RBAL for group number 3
Errors in file /oracle/app/oracle/diag/asm/+asm/+ASM1/trace/+ASM1_rbal_24739.trc:
ORA-15066: offlining disk "RECOC1_CD_00_INPPRODWCELADM02" in group "RECOC1" may result in a data loss
Sat Feb 08 14:41:27 2020
 Received dirty detach msg from inst 4 for dom 3
Sat Feb 08 14:41:27 2020
NOTE: halting all I/Os to diskgroup 3 (RECOC1)
NOTE: LGWR doing non-clean dismount of group 3 (RECOC1)
NOTE: LGWR sync ABA=321.8409 last written ABA 321.8409



BUSINESS IMPACT
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모든 Instance의 비정상적인 crash 및 startup 불가

변경 내역

 Dec. 14, 2019 :  DATA diskgroup 과 RECO diskgroup 을 Resizing함. DATA diskgroup을 늘리고 RECO diskgroup을 줄임.

 Feb.   8, 2020 :  Cell서버#6 메모리 교체

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