Exadata X5-2 Hardware
 

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Goal

 How to mount diagnostic iso (diag.iso) on an Exadata X5 Server from a NFS Server?

Solution

At times it is not possible to use Oracle ILOM GUI interface for any reason and you are required to boot Exadata server with diagnostic.iso to fix a configuration issue at Linux OS. The following procedure could be used provided you have a NFS server available to place diag.iso file

For example, in this case, there was a Hugepages misconfiguration on OS which was stopping Server from booting.

To configure a host storage device redirection in the Oracle ILOM command-line interface (CLI), perform the following steps:

Log in to the Oracle ILOM CLI

Run the following command on CLI to mount ISO from a NFS server
set /SP/services/kvms/host_storage_device/remote/server_URI=NFS_or_Samba_URI_file_location [username=username] [password=password]
or

set /SP/services/kvms/host_storage_device/remote/server_URI=NFS_or_Samba_URI_file_location

Enable storage redirection by typing:
set /SP/services/kvms/host_storage_device/ mode=remote

To view the status of redirection, type the command:
show /SP/services/kvms/host_storage_device/ status

Note -  Redirection is active if the status is set to either Operational or Connecting.

Set the next boot device to cdrom
set /HOST boot_device=cdrom

To ensure next boot device, check
show /HOST

Reboot Server
reset /SYS

Server will boot with diag.iso and you can enter into diagnostic mode as mentioned in
How to boot Exadata database server with diagnostic (diag.iso) ISO image (Doc ID 1947114.1)

Correct the OS configuration that you have and when you are done, disable redirection by typing the following in ILOM CLI
set /SP/services/kvms/host_storage_device/ mode=disabled

Then you can reboot the server again to boot with normal Exadata kernel

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