Apple SSD Performance: 512 vs 256 vs 128

[Avery1]

I see quite a few performance specs for the 2011 MPB Apple 128 GB SSD, but very few references for the 256 GB, and more specifically, the 512 GB SSDs.

Can anyone point me to some stats?

 

[calderone]

Here you go.

 

[Avery1]

Here you go.

Awesome. Thanks for posting!

I was surprised to see the 512 tested better in most areas than the 256. I compared to the 128 values at http://www.barefeats.com/mbps02.html and if we were talking apples-apples, it looks like the 256/512 do better than the 128 on small random files, but not as well on large sequential files.

However, I'm not very confident these tests are fully comparable. Any chance you have specs on the 128?

 

[calderone]

All the drives Apple uses are from the same Toshiba Series.

128GB
THNS128GG4BBAA

256GB
THNS256GG8BBAA

512GB
THNS512GG8BBAA

 

[NickZac]

IIRC, the Toshiba drive used benches the best overall figures with the (edit I meant 128 and not 256; sorry!). My 128 runs similar

Disk Test 319.42
Sequential 211.74
Uncached Write 331.28 203.40 MB/sec [4K blocks]
Uncached Write 287.27 162.54 MB/sec [256K blocks]
Uncached Read 103.74 30.36 MB/sec [4K blocks]
Uncached Read 363.37 182.63 MB/sec [256K blocks]
Random 649.96
Uncached Write 418.20 44.27 MB/sec [4K blocks]
Uncached Write 602.45 192.87 MB/sec [256K blocks]
Uncached Read 2143.53 15.19 MB/sec [4K blocks]
Uncached Read 611.01 113.38 MB/sec [256K blocks]



Keep in mind that benchmarks for SSDs are misleading, and the speed of a factory SSD to an aftermarket SSD is even more confusing.

 

[Avery1]

Thanks for all the info!