VMware Cloud Community
jerry5
Enthusiast
Enthusiast
Jump to solution

cache/capacity disks need to be in same ESXI-host?

I am new to vSan concept and practice.

I got a question on vSan concept:

  • Currently, I assign one disk as cache-disk in one ESXI host.
  •                 I assign one disk as capacity-disk in another ESXI host.
  • And I can not proceed as there are "Claiming issues" 
  • do cache/capacity disks need to be in the same ESXI host? 

Thanks!   

(For reference, I attached two screenshots)

cache-capacity.jpg

warn-error.jpg

Reply
0 Kudos
1 Solution

Accepted Solutions
TheBobkin
Champion
Champion
Jump to solution

@CyberNils , Actually it is not mandatory for a vSAN node to have Disk-Groups - you can have compute-only nodes. If you meant you need minimum 1 Cache-tier device + Capacity-tier device per node to make a Disk-Group, that would be true.

View solution in original post

5 Replies
CyberNils
Hot Shot
Hot Shot
Jump to solution

Yes, you need at least one cache disk and one capacity disk per host.



Nils Kristiansen
https://cybernils.net/
TheBobkin
Champion
Champion
Jump to solution

@jerry5 Yes - Disk-Groups are comprised of 1 Cache-tier SSD/NVMe and 1-7 Capacity-tier HDD/SSD/NVMe on each node, these are local-only (e.g. physically in a single ESXi host).

TheBobkin
Champion
Champion
Jump to solution

@CyberNils , Actually it is not mandatory for a vSAN node to have Disk-Groups - you can have compute-only nodes. If you meant you need minimum 1 Cache-tier device + Capacity-tier device per node to make a Disk-Group, that would be true.

jerry5
Enthusiast
Enthusiast
Jump to solution

Thank Nils, Bobkin: you guys save my time and energy!

Reply
0 Kudos
CyberNils
Hot Shot
Hot Shot
Jump to solution

I know, but it was pretty obvious that this guy was not trying to add a compute only node to an existing cluster... 🙂



Nils Kristiansen
https://cybernils.net/
Reply
0 Kudos