Recovering from Oracle host OS disk failure (options)?
There is nothing 'magical' about Oracle and its recover ability. As long as you have your ASM metadata somewhere available, you can import it on a spare host and use that in a fresh installation to attach your SAN hosted files/LUNs and use that to continue your run on. Important is to know that all your data is in ASM and all your ASM disks are on the SAN. If you do happen to have some files containing application data are left on the Server that ran your databases before it crashed, it might cause an extra challenge.

Knowing that it is technically possible is one thing, the ability to perform such a recovery is an other one. The only way to gain that ability is to train for it. Each OS has some things that make it more or less easy to do. This is for any failure scenario.