2018 15" disk speeds?

[Ploki]

I read they should be in the 3gb/s, i cant manage to pull more than 2,6-2,7gb/s on a new one.

i know its still super fast, but cant breaking 3gb/s annoys me a little.

dont want to return it. anyone else running this slow and happy with it?

 

[Howard2k]

I read they should be in the 3gb/s, i cant manage to pull more than 2,6-2,7gb/s on a new one.

i know its still super fast, but cant breaking 3gb/s annoys me a little.

dont want to return it. anyone else running this slow and happy with it?

It'll vary based on the drive you're using (the size, different sized drive have different throughput capacities) and also the sizes of the files you're transferring.

There are probably far more important things to be annoyed about, but if it's really annoying you then provide some firm details and you'll get firmer advice.

 

[Ploki]

It'll vary based on the drive you're using (the size, different sized drive have different throughput capacities) and also the sizes of the files you're transferring.

There are probably far more important things to be annoyed about, but if it's really annoying you then provide some firm details and you'll get firmer advice.

2TB i9 model, testing with Diglloyd disktester and blackmagic diskspeed test, same results. ~2,6gb/s write and ~2,7gb/s read.
blackmagic 5gb stress size.

 

[deeddawg]

I read they should be in the 3gb/s, i cant manage to pull more than 2,6-2,7gb/s on a new one.

dont want to return it. anyone else running this slow and happy with it?

I'm sorry but that is just simply hilarious... I remember when MFM/RLL hard drives were the bee's knees. At 5Mbps.

 

[Howard2k]

That's the right way to test it for sure. And that should be the fastest drive in the 2TB I believe.

Apple states "up to" 3.2GB/s for reads and "up to" 2.2GB/s for writes, based on:

Testing conducted by Apple in June 2018 using preproduction 2.3GHz quad-core Intel Core i5-based 13-inch MacBook Pro systems with 8GB of RAM and 1TB SSD, and preproduction 2.6GHz 6-core Intel Core i7-based 15-inch MacBook Pro systems with 16GB of RAM and 1TB SSD. Tested with FIO 3.7, 1024KB request size, 150GB test file and IO depth=8. Performance tests are conducted using specific computer systems and reflect the approximate performance of MacBook Pro.


So it looks like you're ahead on the writes and behind on the reads. But maybe you can adjust the Black Magic settings and see how it compares to Apple's not above.

I'm sure others will chime in with their results and you can compare.
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I'm sorry but that is just simply hilarious... I remember when MFM/RLL hard drives were the bee's knees. At 5Mbps.

Holy crap, first time I've even see MFM/RLL referenced in a good 20 years!

 

[Ploki]

I'm sorry but that is just simply hilarious... I remember when MFM/RLL hard drives were the bee's knees. At 5Mbps.

Dont know what the heck that is, but the smallest/slowest HDD I remember formatting was 60MB connected via IDE ATA, think it was already 3.5". Probably much faster than 5mbps, not at all blazing fast.

I realize its fast, still curious/annoyed why its not as fast as advertised (and benchmarked elsewhere)

That's the right way to test it for sure. And that should be the fastest drive in the 2TB I believe.

Apple states "up to" 3.2GB/s for reads and "up to" 2.2GB/s for writes, based on:

Testing conducted by Apple in June 2018 using preproduction 2.3GHz quad-core Intel Core i5-based 13-inch MacBook Pro systems with 8GB of RAM and 1TB SSD, and preproduction 2.6GHz 6-core Intel Core i7-based 15-inch MacBook Pro systems with 16GB of RAM and 1TB SSD. Tested with FIO 3.7, 1024KB request size, 150GB test file and IO depth=8. Performance tests are conducted using specific computer systems and reflect the approximate performance of MacBook Pro.


So it looks like you're ahead on the writes and behind on the reads. But maybe you can adjust the Black Magic settings and see how it compares to Apple's not above.

I'm sure others will chime in with their results and you can compare.

Maybe i should test with FIO, adjust blackmagic settings doesnt do much (speeds start to suffer at 1GB size size)
[doublepost=1537475006][/doublepost]

That's the right way to test it for sure. And that should be the fastest drive in the 2TB I believe.


I'm sure others will chime in with their results and you can compare.

https://forums.macrumors.com/thread...b-ssd-should-be-the-same-performance.2131810/

seems I was too hasty.

the 1tb seems to be consistent with my 2tb. FIO probably has direct access to the SSD, and it might be Apple's new byte reference since snow leo that not all apps use. (multiplier of 1000 instead of 1024), should account for roughly 7% difference (so 2,9gb/s in "apples" gigabytes)

 

[deeddawg]

Dont know what the heck that is, but the smallest/slowest HDD I remember formatting was 60MB connected via IDE ATA, think it was already 3.5". Probably much faster than 5mbps, not at all blazing fast.

MFM & RLL refer to the way the data was encoded onto hard drives, particularly the earliest of the 5.25" form factor drives -- the first of which was the 5MB capacity Seagate ST506. That was well out of my financial reach at the time -- more I got into them as they grew to 20 and 30MB. The fun with the 40MB drives was that MS DOS of that era (3.2?) couldn't address a partition larger than 32MB.

I realize its fast, still curious/annoyed why its not as fast as advertised (and benchmarked elsewhere)

I realized that, but couldn't help but be amused at the way your post was written. Recently I was reflecting on the the progress of technology having had gig-fiber installed at home and how far we'd advanced from the old 300baud modems. Thanks for indulging in a bit of humor & reminiscing.