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1. #Trim enabler 840 pro install#
2. #Trim enabler 840 pro upgrade#
3. #Trim enabler 840 pro pro#
4. #Trim enabler 840 pro free#

This is mostly due to sequential writes because at the end of the previous HDtach run, write performance was already at 250MB/s. ignoring some of the TRIM "suggestions").Īs a final test, I TRIM'ed the drive again and ran HDtach:Īnd now performance is what it should be. Another possibility is that with the fewer number of P/E cycles, the 840 is just very conservative about using them when it's not stricly necessary (e.g. Given the higher program/erase latencies with TLC NAND it's entirely possible that the 840's garbage collection routine is just slower than we're used to seeing. Remember that TRIM is still just a suggestion-it's up to the controller to prioritize TRIMed LBAs for garbage collection. Keep in mind that I TRIM'ed the drive right after the torture I didn't run HDtach in between like we often do but a functioning TRIM should still fully restore performance. It does get to 250MB/s at the end of the HDtach run, but the starting performance is only 150MB/s. The drop isn't huge as we are still talking about +350MB/s at all times, but it's interesting and a bit odd to see this kind of behavior since read speed was ~425MB/s after torture.įinally I secure erased the drive again, filled it, tortured for 20 minutes and TRIM'ed it:Īgain we see some weird behavior as write speed is not fully restored after TRIM. Write speed is fully restored but for some reason, read speed is fluctuating. To see how idle time is able to restore performance, I let the drive idle for 50 minutes:

#Trim enabler 840 pro pro#

The 840 Pro will be a better option for heavy write workloads already due to its higher endurance. We typically recommend around 20%, however with TLC NAND it might be advisable to bump that up to 30%.

#Trim enabler 840 pro free#

The way to avoid this worst case state is to keep as much free space on your drive as possible. Write speed drops to as low as 25MB/s, although it's nearly restored before all user-accessible LBAs have been filled. Usually 20 minutes isn't enough to put 256GB drives on their knees but it definitely is for the 840. Next I secure erased the drive again, filled it with compressible data and proceeded with torturing it for 20 minutes with compressible 4KB random writes (100% LBA space, QD=32): You do the math.For starters, I ran HDtach on a secure erased drive to get the baseline performance: Right now I myself use a 4-th SSD Samsung 840 without trim enabled. It's been 3 moths since, and they haven't returned since. After replacing them i hadn't turned on trim anymore. They both came back to me in a month and a half with a fired SSD.

#Trim enabler 840 pro upgrade#

I just recently had 2 customers with a macbook that asked me to upgrade to an SSD. I can't really prove it, I my self, am a guy that needs hard proof, but this isn't a coincidence. Its not the laptop ( MacBook Pro 17" Mid 2010 I5, nVidia 330M ). If it were a motherboard problem, they would have found it. As I was saying, I work in a service, I have tech guys which are very good at what they do. As soon as I turn on trim, with in a month or so, my SSD dies. Cant really explain it, not an OS X expert.

So I deal with a lot of laptops on a daily basis. Im at my 4-th right now ( thx God for warranty ). I fried 3 SSD Samsung 840 ( not the pro version ). The problem with the OS X Trim command it that it kills your SSD.

#Trim enabler 840 pro install#

Only for second round: Install TRIM Enabler and reboot MacBook Pro.This gives us a total of four results:Ī detailed account of a round of benchmarking: This provides a good comparison between fresh out of box and well-used performance.įor the second round, we perform another secure erase, and then we send it through the two benchmark passes with TRIM enabled.

We then complete the first round of benchmarks, which consists of running AJA System Test and DiskTester twice without TRIM. This resets the SSD to the state it shipped in, yielding the best possible performance. First, we perform a secure erase, which tells the controller to clear all blocks on the drive. We’re sending the Samsung 840 Pro SSD though two rounds of benchmarks.