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Does Partitioning an SDD reduce Parallelism/Speed

post #1 of 6
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I just purchased a Samsung 850 EVO 500GB SSD. Since I make routine back up's of my OS, I'd prefer to have 250GB for the OS partition and the second partition purely for games. It would be a pain in the ass to have to make 500GB backup files and yes I am aware of differential and incremental back ups.

All I am wondering is does splitting the drive in half theoretically reduce it's raw write speed. Forget about the Samsung tubro write. The 500GB EVO can write at full speed without the turbo write)due to parallelism) but not the 250 GB version, which essentially if I partition the drive this way I am afraid it will perform at the level of the 250GB drive.
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post #2 of 6
Good question.

Download partition wizard, make your changes, and run some benchmarks. You tell us tongue.gif

Ultimately, I doubt you'd notice a difference either way. More likely than not, any turbo boost features will only look good in benchmarks - that's it.
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post #3 of 6
Interested in this as well.
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post #4 of 6
I would be very surprised if this is the case. LBAs on an SSD aren't ordered sequentially across NAND and I don't think it's possible for any sort of partitioning to keep a drive from using all the parallelism available to it.
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post #5 of 6
Thread Starter 
Quote:
Originally Posted by Blameless View Post

I would be very surprised if this is the case. LBAs on an SSD aren't ordered sequentially across NAND and I don't think it's possible for any sort of partitioning to keep a drive from using all the parallelism available to it.


Here is what someone else has said on the matter, so who knows.
Quote:
The speed of a SSD directly connects to the amount of usable space on the in-use partition. If you partitioned the drive into small sections the efficiency of the SSD will be hit because of the lack of free space.

So there are no drawbacks of partitioning a SSD, but there are drawbacks of not having free space on the drive.

Edited by Nightingale - 5/21/15 at 2:53pm
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post #6 of 6
That quote is definitely mistaken. The drive doesn't lose access to the partitioned or unpartitioned area; generally any unused space can be used for wear leveling and garbage collection. Most drives have reserved space for this purpose, but when this isn't enough, only partitioning a portion of the drive will increase, not decrease, performance in high usage scenarios.

Splitting the drive into two equal partitions is almost certainly not going to harm it's performance in any way. Running the drive completely full of data, no matter how it's partitioned, might.
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