It should be. But if you have vSAN, your vSAN configuration to be done freshly. Have a look this URL
During reinstall select preserve datastore, this will make your datastore intact as earlier.
Yes, your remote data will be preserved. You just need to take care while selecting the datastore to install ESXi.
I have already done that in our environment where an esxi was got corrupted so i reinstalled it on SD card.
Hope, this will make your confusion clear.