I haven't previously used FileVault but would like to enable it. My system disk is SSD but the secondary internal disk is HDD. I've read that performance won't be an issue on the SSD but what about the HDD? This is for a mid-2011 iMac. I was also wondering...if I encrypt the entire drive using FileVault is there any good reason to continue to use encrypted sparse bundles? That's been my previous method for storing sensitive files. Thanks for any advice.