CVM installation - the system has SSD but installer says it's HDD

  • 29 October 2021
  • 6 replies

Hello Everybody,


We use Cisco C220M5 server with internal storage based on SSD. There are few RAID volumes created and the installer sees them all but all the volumes shown like ‘HDD’.

We tried to modify system parameters from the shell but we can't return back to the installer GUI.

Are there any options to override disk type check? If there are no such options then how to return back to the installer?

6 replies

Userlevel 1
Badge +2


What do you mean with “there are few RAID volumes created"? Do you mean that the server has a RAID config created where you want to deploy Nutanix onto? 

For exampe the Nutanix NX-3060-G8 hardware has a RAID 1 NVME disk set for boot and normale (NON RAID) disks which are for the storage used. 

You can run foundation again to reinstall the cluster. 

Hi Jeroen,

Thank you for reply

Yes, the server has bunch of disks connected to the RAID controller; all of them are SSDs. There are 3 RAID volumes were created so we have 3 virtual disks. The installer requires to select the disks for hypervisor, CVM and data. At that point we were stuck because the installer shows all the disks as HDDs, so we can’t continue (CVM must be installed onto SSD).

It seems the problem with disk type may be solved in system shell by changing value in /sys/block/[OUR_DISKS]/queue/rotational to 0, so the only question here is how to return back to the installer (I mean how can we restart the installer without reboot).

Userlevel 1
Badge +2

You only need the hypervisor (boot) to be in RAID. The other disks should not be availble in RAID and should be directly available for Nutanix. 

Are you installing Community Edition??????

Yes that’s community edition

Userlevel 1
Badge +2

Ah you are in the wrong forum ;) 


But remove the raid from the drives (keep one raid 1 for boot). Install hypervisor (boot) on the raid 1. Seect the other disks for cvm and data. 

It seems yes (wrong forum) but thank you for patience :-)

Unfortunately the disks aren't visible by any OS when we remove them from the RAID. I think ‘pass-through’ mode is not supported by the controller.

Anyway we were able to finish the installstion. A trick with changing ‘rotational’ value worked for us.