VMware Cloud Community
Petersaints
Enthusiast
Enthusiast
Jump to solution

vSAN Capacity

Hello all,
I have this doubt:
i'm using 3.84 TB SSD disk for capacity. I have 4 nodes, each one with 8 disks for capacity (2 disk groups x4 disks), a total of 32 disks x 3.84. vSAN policy is FFT1-RAID5.
vSphere consider the capacity of each disk as 3.49TB. So it consider total capacity of 111.78TB.

Petersaints_0-1624525616598.png

If i run the VMware vSAN ReadyNode sizer (https://vsansizer.vmware.com/reversesizer ), for total of 32 disks x 3.84 with the FFT1-RAID5, the total capacity is 122.88TB

Petersaints_1-1624525701773.png

Which value is the correct one?

I need to clarify that, because i have to calculate the real usable capacity that i can use (removing the 30% of slack space and the 1.33 of the FFT1-RAID5).

 

Thanks!

Regards.

Reply
0 Kudos
1 Solution

Accepted Solutions
TheBobkin
Champion
Champion
Jump to solution

@Petersaints , Actually both are 'correct' just that one is in TB and other is in TiB:

TheBobkin_0-1624526534460.png

 

vSAN/vSphere actually uses GiB/TiB so the lower one is what you should be gauging by.

 

View solution in original post

Reply
0 Kudos
2 Replies
TheBobkin
Champion
Champion
Jump to solution

@Petersaints , Actually both are 'correct' just that one is in TB and other is in TiB:

TheBobkin_0-1624526534460.png

 

vSAN/vSphere actually uses GiB/TiB so the lower one is what you should be gauging by.

 

Reply
0 Kudos
Petersaints
Enthusiast
Enthusiast
Jump to solution

Thanks @TheBobkin !

Reply
0 Kudos