Hello, I have a SATA3 SSD with OS and Apps on them, and 2 SATA2 HDDs, one for footages/projects and the other for renders/archive.
I believe putting the disk/media cache in the SSD would boost performance because of the speed, but I heard it can shorten the lifespan of the disk, although I'm not sure by how much.
I guess I could purchase another SSD dedicated for disk cache, but I'd rather not if putting them on the same drive with OS and Apps won't be too much problem.
Go ahead and put your caches on the same SSD as your OS and applications.
Most of the concerns about repeated writes causing SSDs to fail are from earlier versions of the technology. Reliability is greatly improved now. Also, there's nothing much lost if your SSD fails and it only has your applications, OS, and caches on it, since you can reinstall your OS and applications rather easily.
You never want to have your irreplaceable assets (like the only copy of your footage) on a disk that you are afraid of failing.
Hey Todd, thank you very much. I feel much better about what to do now.