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Max out systems read and write speeds?

post #1 of 8
10/17/12 at 1:33am
Thread Starter 
I'm just kinda wondering... Would your systems max out its read or speeds of the RAM if the SSD read or writes speeds are faster? (if thats possible)
Like your RAM is at 1600 Mhz and you have a PCIe SSD or Raid0 SSD's that does over 2000 Mb/s read/write or higher and have a single file that is 10 gigabites on 16 Gig's of RAM and this file is in the RAM and needs to go to the SSD for saving. I am a little new at this so if its a dumb question forgive me.
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post #2 of 8
10/17/12 at 1:43am
Lol hi mate,

Well, no it's not a stupid question, however no it's not really possible. The write speeds of memory are so much higher that it wouldn't be possible to get an SSD (at this point) that can read write as fast as memory can.

if I remember rightly the memory read write speeds are closer to 10GB a second, if you run memtest86+ you can see it on there. You can also do a RAMdisk if you have the memory available, no loading times biggrin.gif

COMps
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post #3 of 8
10/17/12 at 1:52am
Thread Starter 
Ok thank you.
I tried to look it up and spent 1 hour and came up with nothing relating to the that question lol.
My system is kinda old like SATA1 and LGA 775 Q6600 old ports old so theres no way for me to reach thoes speeds.
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post #4 of 8
10/17/12 at 1:56am
Actually it is entirely possible to build an SSD array that can reach RAM-level read/write speeds (at least sequential speeds). 10GB/s = 20x500MB/s, which is easily doable in a RAID array. You'd likely need to spread it across multiple cards, but it can be done.

Of course it will never exactly match you system's RAM speed due to the way that the data is transferred, and definitely not in random access, but it's not entirely out of the question.
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post #5 of 8
10/17/12 at 2:18am
Quote:
Originally Posted by Manyak View Post

Actually it is entirely possible to build an SSD array that can reach RAM-level read/write speeds (at least sequential speeds). 10GB/s = 20x500MB/s, which is easily doable in a RAID array. You'd likely need to spread it across multiple cards, but it can be done.
Of course it will never exactly match you system's RAM speed due to the way that the data is transferred, and definitely not in random access, but it's not entirely out of the question.

Well, it kind of is, since the array failure rate increases with the amount of disks that you have in the array. It would basically be a very unstable array and even then you would have to have one raid card that could handle the 20 disks in the first place... SO basically yes theorectically it can be done, in practice not so much.
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post #6 of 8
10/17/12 at 4:29am
Quote:
Originally Posted by compuman145 View Post

Well, it kind of is, since the array failure rate increases with the amount of disks that you have in the array. It would basically be a very unstable array and even then you would have to have one raid card that could handle the 20 disks in the first place... SO basically yes theorectically it can be done, in practice not so much.

It's common practice to have arrays with 50+ drives. Controllers that have 24 ports are readily available and have been for nearly a decade now, and arrays can span more than one controller. Furthermore, there are expansion cards that can take one SATA/SAS port and split it up into 8 or more. In fact, you can actually connect up to 256 drives to nearly any controller, although the max transfer speed will still equal the number of SAS lanes available. Although this doesn't help sequential speeds, it does help with random workloads.

Of course these super large arrays are normally done using RAID60, but the speed is still there as long as you're willing to add more drives.


Hell, I've got a 20 port card in my own server at home rolleyes.gif
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post #7 of 8
10/17/12 at 3:39pm
Thread Starter 
Ok it can be done but to make it stable you need the right raid controller got it I think...
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post #8 of 8
10/17/12 at 5:58pm
Thread Starter 
Well I ran that RamDisk program that Compuman145 said and set it up with a 2048MB partition in the RAM and formated it to NTFS. I ran Crystal Disk Mark and I think this gives me a good idea what my MAX read and write speeds are for my PC in stock settings.
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