-) Hybridised SSD - Hard Disk (-

How does this intelligently create a good cache?

If its manual you may as well just have a separate SSD and HDD and transfer stuff across yourself.

If its based on requests then the HDD is still the bottleneck.

If its based on what you've recently opened in the current session then more RAM with superfetch is much better.
 
jigger said:
I would think the controller would keep a list the most commonly used files and adds them to the SDD cache maybe ?
Click to expand...

It just needs to store the first 5-10% of a file on an SSD and the rest of the file on the HDD.
It's a great idea especially if they make a solution that will work on raid hdd's, as that way you won't lose any sequential speed and could actually improve the performance over an x25
 
Monkeynut said:
How would you defragment the mechanical HDD/perform TRIM on the SSD with this then?
Click to expand...

Not sure about the defrag but I suppose trim is less important because its a cache, it could completely wipe sections of the SSD every now and again and repopulate them from the hard disk. I dont know if it actually does this or not though.
 
There's a lot of unknowns with this bit of kit. Most likely is that there's a bit of windows jiggery pokery to make it work. I suspect there's a fair bit of reading/writing in the background between the drives.

rhys216 said:
It just needs to store the first 5-10% of a file on an SSD and the rest of the file on the HDD.
Click to expand...

I assume this idea is to mitigate HD access times? If you assume an SSD does say, 200MB/s, you'd need to store 1.8MB of the start of files (9ms access).
I think this has the potential to be a winning idea actually, all the small files will automatically be on SSD. Just need someone to implement it.
 
Some info,

http://www.silverstonetek.com/products/p_contents.php?pno=HDDBOOST&area=usa

"It creates a mirror of front end data of the HDD on the SSD and allows the system to access them in less than a millisecond. However, the rest of the data is still read from the HDD, but in spite of this SilverStone claims it can accelerate the drive by up to 70 percent, depending on the speed of the SSD"


I'm thinking of three drives in RAID 5 or a pair in RAID 0, or maybe even JABOD

Do you think most RAID controller would see the drive correctly ?
 
^^^
I think it currently only works with non-raid arrays as I can't see where they would all connect into the device? Maybe a future product will support such an option.

This could potentially give us better than x25-m performance in multi TB capacities for a few hundred £ instead of thousands.

Edit:
This technique could also enable super speedy storage solutions if you can raid a couple of SSD's and a few 4 or 5 HDD's that match the sequential's of the SSD's.
 
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Just thought of another application for a similar technology.
You could use a device that use's a few sticks of ram to enable an SSD used as an OS drive to have the same access times as RAM. This would make a system really fly i.e. 4k reads/writes over 150mb/s.
Perhaps as soon as the system is powered on the drivers already begin mirroring the data over to the ram which should only take a few seconds considering not much data needs to be copied, and the device should be ready by the time you get to windows.
 
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It looks like its just a single cable from the motherboard to the controller, thats then split between the two drives to create the hybrid.
So every drive in the array would be made from three components.

The question is if this would cause problems setting up the drives in RAID ?

What size stripe would people recommend ?
 
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Anyone ?

Would RAID 0+1 with three Samsung HD502LJ and three 30Gb OCZ vertex drives be any good ?

I'm not really that clued up on the latest drives, sorry.
 
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