title: How can one keep the data on a local SSD between stopping and restarting an instance
body: <p>In my case I need only CPU compute for a while, and then at at the end I need GPUs. So I run the instance only with CPUs, then stop and restart with GPUs added (and CPUs reduced). However, it seems this will lead to the data on the local SSD being erased. Is there any way around that? Could one maybe back it up first with a snapshot for example and then restore the data to the local SSD after restarting the instance?</p>
  
  <p>I have not tried out using local SSDs. I want to know what <em>would</em> happen.</p>