PCPer File Copy Test
Our custom PCPer-FC test does some fairly simple file creation and copy routines in order to test the storage system for speed. The script creates a set of files of varying sizes, times the creation process, then copies the same files to another partition on the same hard drive and times the copy process as well. There are four file patterns that we used to try and find any strong or weak points in the hardware: 10 files @ 1000 MB each, 100 files @ 100 MB each, 500 files @ 10 MB each and 1000 files at 1 MB each.
I've restructured these charts to group by test as opposed to by SSD. It should make readability and comparisons a bit easier. Feedback is welcome here.
Our first test is perhaps one of the best to demonstrate the write speed differences between Samsung's VNAND and competing solutions. The M550 uses 64 Gbit 2D NAND, which fares well, but does slow down a bit at the 128GB capacity. The ADATA SP610 uses 128 Gbit 2D NAND, and despite controller differences, we can see the beginnings of a slow down at 256GB and a very noticable slow down at 128GB. It should be noted that while we did not include MX100 data here, it will behave similar to the SP610 when it comes to write speed vs. capacity.
File copies reflect the same write speed hurdles of the competing units, along with an interesting data point in that the 1TB 850 Pro sees a bit of a slow down at this capacity. Other controllers did not see this dip when going from 512GB to 1TB, so we can only attribute this to possible added addressing or fanout overhead with the MEX controller at this capacity (and connected to so many dies).
These new charts are not the
These new charts are not the easiest to read.
Slightly larger text and solid colored bars would help a lot.
I second this. I find them
I second this. I find them very hard to read. The bar charts are okay because they are all in order, but when they wonder around like the line graphs, they’re practically illegible. Add in the mislabeled axies and I’m not sure what I’m supposed to be reading.
Agreed.
Agreed.
Not the easiest graphs to
Not the easiest graphs to read!
Background color hinder very much.
It looks like you mislabeled
It looks like you mislabeled the X axis on the PCPer File Copy Test charts. I’m guessing it’s supposed to be “seconds” rather than “MB/s”.
Agreed. Also, i’m pretty sure
Agreed. Also, i’m pretty sure that for the “IO Meter Average Transaction Time” lower – not higher – should be better.
Thanks for the catch, I’ve
Thanks for the catch, I've re-uploaded corrected versions, and expanded the QD out to 8 on these to more easily see where the drives are headed. Expanding it further would make the lower part of the scale harder to read.
Yeah, I almost went out and
Yeah, I almost went out and bought an ADATA SP610 in 128GB. 🙂 That thing beat everyone!
Got it. Fixed the axis label
Got it. Fixed the axis label on file creation and copy charts. Thanks for reporting this.
Look at how much extra room
Look at how much extra room is available in that 2.5in casing for the 512 and 1tb models! Going with full 16 layer packages and filling up the remaining space with them could yield a 2.5 inch SSD in excess of 3TB. O_O
This tech needs to hurry up and get fully commoditized so Samsung has an incentive to make drives that size and we can actually buy them at reasonable prices. Doing so would put a few more well earned nails in the HDD makers coffins.
hey Allyn when are you
hey Allyn when are you getting the intel 750 pci-e ssd? supposed to be out in Q4 and well… its Q4 now!
Possible error with the YAPT
Possible error with the YAPT chart. Shows queue depth on the bottom when it should be block size(or whatever the correct term would be). Regardless, interesting new benchmark along with a great article.
Fixed, and thanks!
Fixed, and thanks!
I’m wondering, can these
I’m wondering, can these drives perform any faster if connected to 12gb/s SAS ports?
The controller and connector
The controller and connector do not support SAS 12Gbit/sec. Even if connected to an appropriate HBA, the link would fall back to 6Gbit SATA.
As usual I’m late to posting
As usual I’m late to posting comments, but in case anyone notices my post: I have not found any source at Samsung or here where it addresses some sort of “hold-up” protection on the power line in case of a PSU failure. Anyone know?