Hello,
on our rac database is little problem.
System description :
OEL : 7.4
DB : Oracle 12.2 EE with GI apr2018
2x RAC node in OracleVM
ASM is via NFS4.1 connected to NetApp storage with this params :
"rw,bg,hard,nointr,rsize=32768,wsize=32768,tcp,vers=4.1,timeo=600,acregmin=0,acregmax=0,acdirmin=0,actimeo=0"
What happening
GIMR database grew up to 100% size of ASM diskgroup. So, no space left in this ASM diskgroup, no possible to allocate more disk space for GIMR database.
I added disk to GIMR diskgroup via asmca, but in this step give asmca this error message : "disk is not visible on client instance"
Actual status
Actual status is, that new disk is a member, but without disk name and can't be used, see pictures from asmca :

So, I can't remove this bad disk.
Is there solution to solve this problem? Or I should create new diskgroup, move gimr db to new diskgroup and then drop old diskgroup?
Thanks for tips.