SSD and SSHD in 1 system

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wh3resmycar

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Sep 12, 2007
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So i recently bought an 240gb SSD (kingston v300). I went with this because it's quite and it's literally faster than the any old mechanical drives out there. as far as the upgrade went, it went great.

i'm curious though as i have an SSHD in this system (8gb seagate SSHD 4tb). is the cache still being used? i have about 2tb of steam games in the sshd. but my most common games, nba2k/dota2 are stored in the ssd.

won't it be counter intuitive if my system is caching onto the 8gb nand in the sshd even though the game is running from the SSD?
 
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Gingerbread
The ssd and sshd have nothing to do together. Your ssd will operate normally, and your hdd (sshd) will work faster due to its own cache. So yeah cache is still being used and the sshd will work better than a normal 7200rpm hdd. Also your system cannot cache in the nand of the sshd when it's running games on the ssd.
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The ssd and sshd have nothing to do together. Your ssd will operate normally, and your hdd (sshd) will work faster due to its own cache. So yeah cache is still being used and the sshd will work better than a normal 7200rpm hdd. Also your system cannot cache in the nand of the sshd when it's running games on the ssd.
 
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Solution
The cache on the SSHD is still being used as a cache for that drive. It has nothing to do with any other drive, or whatever the rest of the system is doing.
You could have 3 x slow HDD's, and that SSHD would still do what it is doing.

That thing only caches what is on that drive, not the rest of the system.
 
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An explanation of what? SSHD is like a hdd but instead of having like 64mb cache like standard hdds it has 8gb larger nand cache. This cache is dedicated to the sshd and other drives have no access to it. Even if you ssd had access to that cache, it would still be faster to cache on its own space (which is a big cache itself if you look at it that way) than it would be on the sshd's cache. That's the point of the cache, small memory which is close by, works really fast, and is accessable really fast. That's why CPUs have some small cache, to access it for faster instruction timings, because current IA-64 architecture is slow, the process of reading from the main memory (ram) is slow and taxing.
 
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I think part of the question which im myself aren't sure of exactly is the os is on the SSHD correct? the game is on the SSD so i'd imagine the os would have some interaction with the game placing some of the information on the SSHD where the os is. Is this how it works or not?
 
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i split the 240gb SSD into 1 os partition and a fast partition. from my understanding, the cache in the SSHD will be used even if files aren't actually being pulled from it. like the whole system will treat the 8GB cache as long as files are being used regardless of the source drive. hopefully i'm wrong.
 
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what do you mean you split the 240gb and a fast partition? The whole SSD is 'fast', your sshd's ssd cache sort of became redundant the second you put in the SSD with the os on it. Can still use it as storage but will have little use out of the sshd cache without the os on it.

Like the others have said, only files used regularly on the SSHD will use the 8GB ssd cache, the os now on the SSD wont have any interaction.

Think sshd like a normal hdd with an tiny ssd inside it.

 
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The "OS" exists on whichever drive you install it on.
Other things can be installed on that same drive, or other drives.
 
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That wasn't exactly my question, i'll rephrase. Would a game on the SSD put information in the ssd cache on the sshd where the os is? I'm not sure how far an os would influence data in this scenario if not at all, why i asked.

I'll just get this question out the way because i think its irrelevant now since the op has put the os on the ssd to my understanding. Will just confuse things.
 
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Think of the SSHD as a single drive. A regular hard drive, with a large (8GB) cache space.
You, the user, do not get to influence what goes on that cache space. Just like any other drive.

You just get to talk to that drive as a whole.
 
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alright then. if that's the case where sshd files are the only files that gets to be cached on the 8gb nand i'd probably get another 1 and put them in raid. i'd have to redownload 2tb of steam games but if that means my non-ssd games will load faster then so be it.

thanks guys.
 
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Back up a step or two...

Why RAID?
What are you actually trying to do?

You can't RAID (whatever level) that 8GB SSD space on the SSHD. It doesn't work like that.
 
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