Micron M510DC (480GB) Enterprise SATA SSD Review
by Kristian Vättö on July 21, 2015 8:00 AM EST128KB Sequential Write
While most enterprise IO patterns are random by nature, there are use cases such as media streaming where sequential performance has a significant role. The sequential write test is a two-hour run with performance being measured during the last 500 seconds for accurate steady-state performance.
The M510DC offers mediocre sequential write performance, but making a direct comparison is hard given the different capacities. Random IO performance isn't as heavily impacted by the amount of NAND, but in sequential write performance the capacity plays a significant role (take the two 845DC EVOs as an example).
Queue depth scaling doesn't present any surprises. Nearly all drives reach maximum data rate at QD2, which is well below the average queue depth of a typical enterprise workload.
Unfortunately my script had a minor error in it and I don't have consistency to report. I've now fixed the script, but in order to deliver this review on a timely matter I decided to leave it out for now because retesting all drives would have taken an extra week or so.
The efficiency isn't admirable, but honestly only the 845DC PRO shines here thanks to the higher power efficiency of 3D NAND.
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Kristian Vättö - Tuesday, July 21, 2015 - link
The endurance rating is basically the warranty for the drive, so it's a quite practical measure. If the drive fails before exceeding the rating, then you are eligible for replacements.nils_ - Friday, July 24, 2015 - link
It's a bit pointless to have a warranty on DC hardware if you have to send in your broken drive to get a replacement, since you're supposed to destroy it.Kristian Vättö - Sunday, July 26, 2015 - link
I'm not sure how exactly enterprise warranties work, but I would expect them to be more flexible given that the customers often do business worth of at least hundreds of thousands of dollars. Besides, with encryption the data is safe even when sent to the manufacturer.toyotabedzrock - Wednesday, July 22, 2015 - link
The 845dc pro was not in the mixed workload.Rekkx - Wednesday, July 22, 2015 - link
The problem with the Samsung 845DC (EVO and Pro) is that it is already EOL.andjohn2000 - Wednesday, July 22, 2015 - link
Micron SSD is not reliable and can easily corrupt the dataZeDestructor - Friday, July 24, 2015 - link
Source? Cause I've seen nothing that indicates they're any better or worse than the comnpetition.ZeDestructor - Friday, July 24, 2015 - link
SandForce SF-2281 excepted....velanapontinha - Friday, July 24, 2015 - link
Hi, Kristian.Long time reader, here (since '98, I think), shy poster, though.
I wonder if you guys would consider evaluating real-life endurance in enterprise SSDs. Much like this:
http://blog.innovaengineering.co.uk/
Cheers,
Fernando
Kristian Vättö - Sunday, July 26, 2015 - link
The problem with evaluating endurance, especially on enterprise drives, is that by the time we have any useful data to show the drives are already obsolete. A sample size of one isn't enough either for any statistical analysis, so to really test endurance in real world we would need our own mini data center with hundreds of drives to get sufficient amount of data.