Upgrade of Force10 S4048-ON from very old release 9.9.0(P9) to the latest

Dear Community, 

 

I have to upgrade to switches CORE (S4048-ON) configured with a VLT.

I have the release 9.9(0.0P9) on these 2 switches.

#show os-version

RELEASE IMAGE INFORMATION :
---------------------------------------------------------------------
Platform Version Size ReleaseTime
S-Series:SK-ON 9.9(0.0P9) 62933943 Feb 4 2016 09:22:35

TARGET IMAGE INFORMATION :
---------------------------------------------------------------------
Type Version Target checksum
runtime 9.9(0.0P9) Control Processor passed

BOOT IMAGE INFORMATION :
---------------------------------------------------------------------
Type Version Target checksum
boot flash 3.21.2.2 Control Processor passed

BOOTSEL IMAGE INFORMATION :
---------------------------------------------------------------------
Type Version Target checksum
boot selector 3.21.0.4 Control Processor passed

FPGA IMAGE INFORMATION :
---------------------------------------------------------------------
Card FPGA Name Version
stack-unit 1 S4048-ON SYSTEM CPLD 11
stack-unit 1 S4048-ON MASTER CPLD 9
stack-unit 1 S4048-ON SLAVE CPLD 4

I see on https://www.force10networks.com/ Web site the latest FTOS release is the 9.14.2.8 , can I upgrade without intermediate steps to the latest release ? 

 

Do you have any advise on this ? 

Thanks a lot for your help  

Have a nice weekend !

Best Regards, Edouard Fazenda.