TERRIBLE "Write" speeds w/2x Samsung 850 Pro Internal SSD (RAID-0).. HELP! ( pics)

[url]http://imgur.com/a/5p05u[/url]
Hello.. I was really hoping somebody could help me out with this, as I'm pretty much starting to lose hope..
I've attached as many relative screenshots as possible, to make it easier to quickly see what's going on.
I've got [b]2x brand-new, Samsung 850 Pro 512GB SSD's[/b] installed inside my MacBook Pro.. [b]One inside the hard-drive bay, and one inside the Optical Bay[/b] (SuperDrive Bay), using an OWC Data-Doubler..
I've got these drives configured using Disk Utility, into a RAID-0 striped configuration..
[u]The drives are rated @:[/u]
[b]Sequential Read:[/b] 550MB/s
[b]Sequential Write:[/b] 520MB/s
[img]http://i.imgur.com/sY83PX0.png[/img]
So "theoretically", I should be achieving approximately close to double these speeds (since that's the basis behind RAID-0 configurations)
[u]Both SSD's are connected internally via SATA-III (6Gigabit Link + 6Gigabit Negotiated Link Speed)[/u].. Both in the hard-drive bay, as well as in the Optical Bay (confirmed in pictures)..
I'm getting [b]*EXCELLENT* "Read" Speeds[/b], yet [b]*HORRIBLE* "Write Speeds[/b].. to the point that the RAID-0 software configuration is not even achieving *near* the "Write" Speed of even one of these drives.. let alone 2 of these drives in RAID-0..
[img]http://i.imgur.com/0jw9Z7l.png[/img]
I've tried contacting Samsung directly regarding this issue, but since they don't exactly get along with Apple, and even more-so, dislike anything that has to do with "RAID" configurations, I was left with practically no help on that end..
I've tried contacting Apple, who said that I'm pretty much on my own, in terms of support, since [i]they[/i] don't exactly get along with Samsung either.. and don't provide much of any support whatsoever, when it comes to third-party, hardware components that are not upgraded directly through Apple themselves.. (aka no support for user-end personal upgrades)
Both of these drives are [b]*Brand New*[/b] directly out-of-the-box, shipped from Amazon, as "new, un-opened" items..
[b][u]About This Mac:[/b][/u]
[img]http://i.imgur.com/Q8GfnO7.png[/img][img]http://i.imgur.com/jFFyKak.png[/img][im g]http://i.imgur.com/0eEflcN.png[/img][img]http://i.imgur.com/XL2pNLf.png[/img]
[b][u]System Report (Detailed):[/b][/u]
[img]http://i.imgur.com/MfPEVZ5.png[/img]
[img]http://i.imgur.com/ffZxYeN.png[/img]
[img]http://i.imgur.com/VdUaOX8.png[/img]
[img]http://i.imgur.com/5fBHsfv.png[/img]
[img]http://i.imgur.com/1t4zW0e.png[/img]
[img]http://i.imgur.com/jdRSksN.png[/img]
[img]http://i.imgur.com/wBY4q8H.png[/img]
The rest I will go on w/bullet-points, for easier reading purposes:
[b][u]Freshly installed, OSX Mavericks 10.9.5[/b][/u]
-Both SSD's individually formatted GUID
-then created into RAID-0, striped configuration
-16K block size .. the minimum selection available (I work with many small files)
-all done using OSX Recovery Assistant + OSX Mavericks full installer, loaded onto externally connected hard-drive
-both showing up as "Online" in Disk Utility
-"Repair Disk" and "Repair Permissions" ran on every single thing possible within OSX Recovery Assistant's "Disk Utility".. everything showing as perfect
-install of OSX Mavericks 10.9.5 completed without any issues whatsoever
[img]http://i.imgur.com/MRbYGCE.png[/img][img]http://i.imgur.com/KBqJvEU.png[/img]
[img]http://i.imgur.com/qtCrXyO.png[/img]
[b][u]Cindori TRIM Enabler 3.3[/b][/u]
-*Purchased*, fully-upgraded, installed properly
-TRIM Enabler showing 100% clear, working "status"
-TRIM Enabler settings all set via direct, specific instructions provided by Samsung support
[img]http://i.imgur.com/rJ8N73P.png[/img]
[img]http://i.imgur.com/lZspk1e.png[/img]
[img]http://i.imgur.com/y5TzLrq.png[/img]
[img]http://i.imgur.com/U1gUZVd.png[/img]
[img]http://i.imgur.com/slL8QoZ.png[/img]
[img]http://i.imgur.com/OsjOH3J.png[/img]
[b]OSX Hardware Tests:[/b]
-Basic Hardware Test (quick) = No Problems Found
-Extended Hardware Test (long) = No Problems Found
[b]OSX Disk Utility (after bootup):[/b]
-"Repair Disk" and "Repair Permissions" ran on every single thing possible .. everything showing as perfect
-both RAID slices showing as "green" and "Online"
[b]PRAM:[/b]
-Manually reset
[b]SMC:[/b]
-Manually reset
[b]Physical file-copy tests (aside from benchmarks):[/b]
-Proving terribly slow performance (not anywhere near the copy+paste speed of even 1 of the SSD's, let alone 2 of them, exact same model and size, configured RAID-0)
I apologize in advance if there's a lot of pictures to go through, however, I know how much of a pain in the *** it can be to troubleshoot these sort of problems, let alone, try to help somebody else troubleshoot these problems while not physically being there in person.. I tried to provide the [b]most comprehensive[/b] troubleshooting steps I've taken thus far, as to hopefully make this thread as fruitful as possible, and eliminate any unnecessary steps that have already been taken..
I've tried re-formatting and re-installing OSX Mavericks 10.9.5 several times now, hoping that maybe one of them would allow the RAID formation to work as it should, yet none so far have proven successful..
If you have any time to look through and read this thread, I can't tell you how appreciative I'd be for your help and any advice possible that you can give me.. I do large amounts of audio processing, producing, along with many other taxing system processes, so I'd really like to get this RAID-0 configuration working as it should be..
Please do not waste your time by bashing RAID-0 or writing an unhelpful, opinionated comment that does not move this process forward.. I understand the risks of RAID-0, I run [b]daily backups[/b], as well as having an Apple Time Capsule running in full-force, all day long.. My data is well backed-up, and I understand the risks.
If anybody has dealt with this sort of issue before, please, give me any advice that you can.. I tried to put in the most effort possible with uploading and embedding all of these photos, as to not waste your time and to hopefully make this troubleshooting process as smooth as possible
Thank you all so much in advance! :apple:

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Merry Christmas

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===========
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I can give it to you if u like
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Hi,
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Really great 'The hatter' !!!
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Next to my 4x discs in the 4 SATA II drive bays I have installed a additional OWC drive kit that allows me to have another 2 disks sitting in the empty bay below the CD/DVD drive and those are connected to the motherboard. So there is a lot to handle for that controller you mentionned ;-)
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Consider the following setup for use with Adobe Premiere Pro CC 2014 as well as After Effects CC 2014 (I would mostly be rendering/exporting to .mp4 or h.264 using AVCHD source media):
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1TB Samsung 850 Pro for Media Cache, Exports, Original/Source Media Files, Previews, and Projects.
Considering the aforementioned setup, would the 840 EVO, in any way shape or form, limit the potential of the 850 pro during any type of rendering/exporting/reading? I doubt it because most of the work is being done on the 1TB 850 Pro, but I don't really know for sure. Considering that the application itself has to be read and is operating on the 840 Pro, I genuinely don't know if it will potentially bottleneck the 850 Pro during these crucial processes. Can anybody point me straight here? On top of that, is there any other way that you might recommend allocating the different file types in the above setup?

That's not much of a problem to me in comparison to the real work. However, to be more specific, take my logic here and explain where I'm either wrong or right.
The 850 Pro is fast and effective at locating, reading, and writing data.
However, the 840 EVO is the SSD running Adobe Premiere Pro CC 2014 (where the program itself is installed).
Here we go; is the following correct or just a wrong assumption:
Since the 840 EVO runs Adobe Premiere, it can only be sending the data to the processor/gpu/etc as fast as the 840 EVO can do; thus, the fact that the 850 Pro can run faster will have little to NO benefit because the instructions that the application/program itself (Adobe Premiere Pro CC 2014) is sending to the parts that do all of the rendering/exporting/work is restricted by the speed of the 840 EVO. Am I correct here?
Basically, to avoid as much confusion as possible:
Due to the fact that the program that sends all of the instructions (as in, telling the CPU to render this and export that, etc) to the CPU/GPU/etc is SLOWER than the 850 Pro, from which all of the data (media, previews, etc) is accessed, then the speed benefits of the 850 pro over the 840 EVO will NOT be utilized and therefore wasted.
This is just my assumption. Where am I wrong here, or is this correct? To use the true benefits of the 850 Pro, should the SSD that the applications are installed on also be an 850 Pro?

T420 won't boot with new Samsung 840 Pro SSD

Hi all
I seem to have a failed brand new SSD. Before I RMA it, please help me spot my stupid mistake
I've just used Samsung data migration to copy my C drive to a Samsung 840 Pro 128GB SSD as usual.
I went into device driver, and set the SSD to cache writes, so the SSD was working then.
I removed the 320GB SSD, installed the SSD and rebooted.
After the BIOS flash screen, the system halts with a funny symbol on the screen and a flashing cursor.
It responds to Ctrl Alt Del. but doesn't get as far as testing the DVD drive.
After replacing the SSD with the HDD and rebooting, all is fine again ...
The BIOS shows AHCI mode, and the SSD and contents (in a USB3 drive caddy) are visible and readable.
I can't use Samsung SSD magician because it won't see the SSD over USB (clever!), so can't work out how to upgrade firmware.
This is an i5, 8GB, 320GB machine with 1600x900 screen, with XP Pro 64-bit.
What gives?? Others here have posted with working 840 Pros in a T420, so I think it's compatible.
Could this be a SATA2/SATA3 thing or AHCI? I can't see any SATA2/3 control in the BIOS - does it just auto-negotiate?
Most grateful for any suggestions and thanks in advance
Solved!
Go to Solution.

Hi woothoot,
I'm not familiar with the Samsung data migration tool. Is it actually cloning the drive, or just copying files and settings?
With ThinkPads, it is usually recommended to have the target drive installed in the laptop and the source on the external connection. Doing it the other way sometimes results in a non-booting drive.
Can you rearrange things so that you do the clone op with the SSD installed in the T420?
Z.
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15" MBP SuperDrive Read & Write Speeds

Could someone please point me in the direction of where it shows the read and write speeds of my 15" MacBook Pro? I know I found them once before but can't remember where.
Also, where can I buy some cheap DVD-Rs & DVD-RWs? Thanks.

You can find the SuperDrive details on the MacBook Pro Tech Specs page.
I usually use dealmac to search for good prices on media.

*TERRIBLE* "Write" speeds w/2x Samsung 850 Pro Internal SSD (RAID-0).. HELP! ( pics)

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