Make Oracle ASM voting file online

Problem:

After changing the quorum node instance type, my cluster’s one of the voting file became offline:

[root@rac1 ~]# crsctl query css votedisk
##  STATE    File Universal Id                File Name Disk group
--  -----    -----------------                --------- ---------
 1. ONLINE   49400dd2b39a4f12bf3c5fa677c056fe (/dev/flashgrid/rac2.xvdba) [GRID]
 2. ONLINE   4a6d94d206104fe6bfbe5435ac7f4586 (/dev/flashgrid/rac1.xvdba) [GRID]
 3. OFFLINE  faf99f5fd78f4f35bfe833bdd1d22b9a (/dev/flashgrid/racq.xvdba) [GRID]
Located 3 voting disk(s).

Solution:

Find out the ASM disk name which contains mentioned voting file, offline and online it:

SQL> select NAME from v$ASM_DISK where PATH='/dev/flashgrid/racq.xvdba';

NAME
------------------------------
RACQ$XVDBA

Offline the disk:

SQL> alter diskgroup GRID offline quorum disk "RACQ$XVDBA";

Diskgroup altered.

Online again:

SQL> alter diskgroup GRID online quorum disk "RACQ$XVDBA";

Diskgroup altered.

Check the status again:

SQL> !crsctl query css votedisk

##  STATE    File Universal Id                File Name Disk group
--  -----    -----------------                --------- ---------
 1. ONLINE   49400dd2b39a4f12bf3c5fa677c056fe (/dev/flashgrid/rac2.xvdba) [GRID]
 2. ONLINE   4a6d94d206104fe6bfbe5435ac7f4586 (/dev/flashgrid/rac1.xvdba) [GRID]
 3. ONLINE   784f924d23c94f3fbf4287c5c6ef572c (/dev/flashgrid/racq.xvdba) [GRID]