4K sector sized diskgroup not listed on v$asm_diskgroup

(Doc ID 2086746.1)

Last updated on MAY 08, 2018

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.2 and later
Information in this document applies to any platform.

Symptoms

4K sector sized diskgroup is not getting listed on v$asm_diskgroup ,but in v$asm_diskgroup_stat from ASM sqlplus.

=================== skgfqio Request Dump =======================
OSD Context: aiopend=0, aiodone=0, limfsiz=4294967295l, sigwinchslot=0
Request flags: READ
- - - - skgfrrq request element 1 - - - -
BLOCKNO = 0
IOV: addr=0x0x7ffff179f530, fib=0x0x7ffff17a73e8, maxaio=0, seal=0x45726963,
fd=256
fsync required?=FALSE, offset=18446744073709551615, aiopend=0
FIB: addr=0x0x7ffff17a73e8, lblksiz=512, ora ftype=15, pblksiz=4096, filsiz=1
maxvec=16, fname=/dev/xio/outcome_tst, serr=0, seal=0x45726963
fstype=0x0, unix ftype=0x61b0, last block=18446744073709551615
IOSB: addr=0x0x7ffff179f5b0, status=3, time=0, qstatus=0,AIO start time=0
err=27072 errno=22 ose[0]=4 ose[1]=0 ose[2]=-1
BUFFER: addr=0x0x7ffff17a6000, len=512
.

kfod disks=all op=disks diskstring='/dev/xio/outcome_tst*' status=true verbose=true
.
fsync required?=FALSE, offset=18446744073709551615, aiopend=0
FIB: addr=0x0x7ffff17a73e8, lblksiz=512, ora ftype=15, pblksiz=4096,
filsiz=1
maxvec=16, fname=/dev/xio/outcome_tst, serr=0, seal=0x45726963
fstype=0x0, unix ftype=0x61b0, last block=18446744073709551615
IOSB: addr=0x0x7ffff179f5b0, status=3, time=0, qstatus=0,AIO start time=0
err=27072 errno=22 ose[0]=4 ose[1]=0 ose[2]=-1
BUFFER: addr=0x0x7ffff17a6000, len=512

+ Setting up environmental variable ORA_ENABLE_4KSECTOR_SUPPORT=TRUE does not help.

Cause

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