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Transcend SSD340 256GB SSD Review

By: Chris Ramseyer | SSDs in Storage | Posted: May 12, 2014 2:00 pm
TweakTown Rating: 77%Manufacturer: Transcend

Futuremark PCMark 8 Extended - Consistency Test

 

Version and / or Patch Used: 2.0.228

 

Heavy Usage Model:

 

FutureMark's PCMark 8 allows us to wear the test drive down to a reasonable consumer steady state and then watch the drive recover on its own through garbage collection. To do that, the drive gets pushed down to steady state with random writes and then idle time between a number of tests allows the drive to recover.

 

Precondition Phase:

1. Write to the drive sequentially through up to the reported capacity with random data.

2. Write the drive through a second time (to take care of overprovisioning).

 

Degradation Phase:

1. Run writes of random size between 8*512 and 2048*512 bytes on random offsets for 10 minutes.

2. Run performance test (one pass only).

3. Repeat 1 and 2 for 8 times, and on each pass increase the duration of random writes by 5 minutes.

 

Steady state Phase:

1. Run writes of random size between 8*512 and 2048*512 bytes on random offsets for 50 minutes.

2. Run performance test (one pass only).

3. Repeat 1 and 2 for 5 times.

 

Recovery Phase:

1. Idle for 5 minutes.

2. Run performance test (one pass only).

3. Repeat 1 and 2 for 5 times.

 

Storage Bandwidth

 

PCMark 8's Consistency test provides a ton of data output that we use to judge a drive's performance.

 

transcend_ssd340_256gb_ssd_review_60

 

This is where things go from decent to bad for the Transcend SSD340. The first time we tested an SSD with the new JMicron controller, we didn't have this test ready. This test replaced a handful of our previous tests since it delivers the same information but gathers the data from real-world tests.

 

With a mixed read / write workload, the SSD340 takes a beating, even after sitting idle. We tested the drive twice and observed the same results in this 24 hours test. To verify the results, we ran the test a third time, this time passing the data through a Teledyne LeCroy SATA protocol analyzer (our new toy in the lab), and the results were identical.

 

Disk Busy Time

 

Disk Busy Time shows us how long the drive has to work to achieve the performance from the above. The best scenario is high throughput performance with low busy time. The less the drive works, the less power it consumes. For the most part, this is an efficiency test.

 

transcend_ssd340_256gb_ssd_review_61

 

Here we see the performance in all of the tests. The drive recovers from its worst case performance, but it never really reaches a high level of performance with this mixed workload.

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