SSD + mSATA SSD?

say if you already have an SSD as the main storage of your notebook, would you still need mSATA SSD for caching?

 

short answer: NO
Long Answer: There is no need of extra mSATA SSD when main storage in your laptop is SSD

 

No, you don't need a cache drive at all if you already have a SSD as an OS/program drive. But, you could get a mSATA and use it as a second drive in your system, either putting your OS/programs on the mSATA and bulk data on the SSD, or vice versa (either is a valid option).

 

But seeing that most mSata SSD drives have lower read and write rate than regular SSD drives, it would be a bad idea to put the OS there and not in SSD itself, isn't it?

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It's still an order of magnitude faster than a mechanical drive, and I doubt that you or anyone else could subjectively feel the difference between a mSATA and 2.5" SATA both running at SATA III speeds.

 

the only logical setup for SSD and msata is raid 0,1,5,10, raid 1,5 or 10 when you need data redundancy whilst the number of ports you have limited yourself to using an identically performing msata, raid 0 when you absolutely need the speed but have limited amount of 2.5 slots

 

Don't really see the point in setting up a speed-optimized RAID setup, as SSDs are already stupid-fast by most definitions and such RAID setups increase the possible failure rates (something like two SSDs with 5% failure rates potentially has a failure rate somewhere around 10% now). And besides some specialized operations that would benefit from 800MB/s+ speeds in a speed-RAID setup, I don't see the point of it when 550MB/s is already really, really fast for gaming and the other usual laptop activities.

A redundancy-oriented RAID might be an interesting option to explore, however. Though I figure that just getting an external HDD and backing up to there would be simpler.

 

I'd agree to your point to a certain extent, however you should understand that although we don't need the data redundancy, some other people do actually require absolute redundancy on their working platform where no risk of unexpected failure are allowed, this happens to a small collection of people, but also they will be in a field of work which is quite important to our society in general so intel needs to honour their needs by providing such options

I cannot imagine a situation where an external HDD won't be of much help, but I'm sure there exists such situation and thats where those options come in handy, just that we as a "normal" laptop user/ gamer will not experience those situations