DB Version: 12.1.0.2
OS: RHEL 6.8
Hi Guys,
I read through a few websites and understand the usage of voting disks.
Basically it's for clusterware health check (disk heart beat(: if disk block is not updated in a short timeout period, that node is considered unhealthy and may be rebooted to avoid split brain situation.
We have a 2 RAC node. What i don't understand is why is there a need for 3 vote disks?
I do understand it's to avoid split brain. But for my case here, all 3 voting disks are from the same storage.
If one node is not able to access 1 of the disk, it won't be able to access the 2 other disks as well. So does it actually serves any purpose here (other than redudancy in case someone delete one of the vote file)?
[grid@rhelrac01 ~]$ crsctl query css votedisk
## STATE File Universal Id File Name Disk group
-- ----- ----------------- --------- ---------
1. ONLINE c657a7aa1d6b4f5ebf284c51f74dab21 (/dev/asm-grid01) [CRS]
2. ONLINE 1825800c37a14fadbfa750dcea70629a (/dev/asm-grid02) [CRS]
3. ONLINE fc5977d13e544fb4bf475fef4a804226 (/dev/asm-grid03) [CRS]
thanks