When using RAID-5 with a 100GB virtual disk, what is the maximum capacity consumed on the vSAN datastore for this virtual disk?
A. 100GB
B. 150GB
C. 133GB
D. 200GB
When using RAID-5 with a 100GB virtual disk, what is the maximum capacity consumed on the vSAN datastore for this virtual disk?
it should be C
https://storagehub.vmware.com/t/vmware-vsan/vsan-6-7-update-1-technical-overview/erasure-coding-raid-5-6-3/
I think it should be C.
it said using RAID-5 (3+1), so it should be 1.33 times, if it is using RAID5 or RAID 6 (4+2）, then it could be 150GB
As it is saying maximum, it should be B. 150GB
Ref – https://docs.vmware.com/en/VMware-vSphere/6.5/vsan-661-administration-guide.pdf . — Page -80
it should be C.
Number of failures to Tolerate = RAID 5/6 (Erasure Coding) – Capacity
Uses x1.33 rather than x2 capacity when compared to RAID-1 (Using RAID 5, the parity data only requires 1.33 times. RAID-1 always consumed double additional space (2x). As a result a VM that is 100GB in size will only consume an additional 33 GB on other hosts with RAID 5, with RAID 1 it would consume 200 GB as you are writing an entire copy of the entire VM to other hosts.)