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How fast is your SSD, and when did you buy your MacBook Air?

KPOM

macrumors P6
Original poster
Oct 23, 2010
15,439
3,880
DeBilbao's recent review of the MacBook Air raised some interesting disk speed results. Specifically, he is getting read and write speeds about 12-20% faster than what the rest of us are seeing.

He downloaded Aja System Test (http://www.aja.com/products/software/) and ran the disk test with a 4GB file at the 1920x1080 and 10 bit video frame setting. Most of us are getting write speeds around 184 MB/s and read speeds of about 208 MB/s. He's getting 207 MB/s and 250 MB/s, respectively.

I'm wondering if Apple has made a running change to the MacBook Air (Rev D). I propose an informal survey. First, what are your read/write speeds running this same test? Second, when did you purchase your MacBook Air? Third, what is your Apple SSD revision number?


I'll start:

Read: 208 MB/s
Write: 184.3 MB/s

Purchased: November 2010

Revision: CJAA0201
 
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Hellhammer

Moderator emeritus
Dec 10, 2008
22,164
581
Finland
I ran it yesterday and got similar results to yours. The SSD is the same revision as yours. Got it in late November.
 

c0052350

macrumors member
Oct 10, 2003
38
0
Faster

Mine are as follows write: 211.8MB/S read:263.3 MB/S 35gb of 128gb used
purchased jan 31st 2011 revision is AXM09A1Q
 

Narkotiq

macrumors newbie
Dec 2, 2010
16
0
Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5)

How do I find out this info?
 

Hellhammer

Moderator emeritus
Dec 10, 2008
22,164
581
Finland
Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5)

How do I find out this info?

Click  > About this Mac > More info > Serial-ATA > Select the SSD > Revision

Too lazy to check that but I think that's how you find it. As for benchmarking the SSD, use the AJA System Test linked in the first post.
 

jamesryanbell

macrumors 68020
Mar 17, 2009
2,171
93
This is the THIRD time I've read about later models being faster (SSD). I think there's something to this.
 

samiznaetekto

macrumors 65816
Dec 26, 2009
1,016
24
Similar results for CJAA0201. January 2011 from MacMall.

Can we be more specific? :D 11.6" or 13"? 64, 128, or 256GB? SSD model? How much space used/left?

Mine: 11.6", 128GB, APPLE SSD TS128C, 68 used/53 available.
 
Last edited by a moderator:

Mac32

Suspended
Nov 20, 2010
1,263
453
Yes, this is important. Larger capacity SSD models tend to be faster than smaller capacity ones. This could be why the speed is varying...
 

mmonnh

macrumors newbie
Dec 2, 2005
9
0
Iowa
13" MBA 2.13 Ghz - 4 GB Ram - 256GB SSD
149 Used
101 Avalable
Cjaa0201
W 181.6
R 206.4
Apple Store Des Moines 1/30/11
 

Hellhammer

Moderator emeritus
Dec 10, 2008
22,164
581
Finland
Yes, this is important. Larger capacity SSD models tend to be faster than smaller capacity ones. This could be why the speed is varying...

Actually, the capacity is pretty irrelevant. When it comes to HDs, that is true because bigger capacity means the drive is denser (assuming they are the same form factor), meaning that more data can be read or written each time the HD spins.

However, this does not apply to SSDs since they don't spin. 40GB SSD is as fast as 480GB one with the same controller. Amount of NANDs may affect the speed but usually they don't.
 

KPOM

macrumors P6
Original poster
Oct 23, 2010
15,439
3,880
Can we be more specific? :D 11.6" or 13"? 64, 128, or 256GB? SSD model? How much space used/left?

Mine: 11.6", 128GB, APPLE SSD TS128C, 68 used/53 available.


It shouldn't make too much of a difference, since I think each version uses the same number of channels, but in any case, I have a 256GB SSD with over 50% free right now.
 

samiznaetekto

macrumors 65816
Dec 26, 2009
1,016
24
It shouldn't make too much of a difference, since I think each version uses the same number of channels, but in any case, I have a 256GB SSD with over 50% free right now.

Maybe, not much difference in terms of speed, but with more detailed info we can track down which models of MBA got new revision of SSD.
 

Beaverman3001

macrumors 6502a
May 20, 2010
542
32
181 write, 209 read. revision CJAA0201

Bought in January from MacMall, prob old stock from original release.
 
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Xeperu

macrumors 6502
May 3, 2010
316
0




Xmas 2010 purchase.
 

Hellhammer

Moderator emeritus
Dec 10, 2008
22,164
581
Finland
Hmmm.. I'm starting to wonder if the SSD in newer MBAs is made by Samsung instead of Toshiba. In the past, Apple has used Samsung SSDs which were reported as "APPLE SSD SM128" in OS X. The new ones are SM128C now. It would make sense if SM stood for Samsung. Toshiba SSDs are "APPLE SSD TS128C" so again, it's logical if TS stands for Toshiba.

If I had to guess, the SSD in newer MBAs is Samsung 470-series as that has speeds of 250/220 MB/s, which makes sense when looking at the benchmarks. Apart from the speed differences, it looks like the newer ones support Native Command Queuing while older ones don't.
 

DoFoT9

macrumors P6
Jun 11, 2007
17,512
33
Singapore
Hmmm.. I'm starting to wonder if the SSD in newer MBAs is made by Samsung instead of Toshiba. In the past, Apple has used Samsung SSDs which were reported as "APPLE SSD SM128" in OS X. The new ones are SM128C now. It would make sense if SM stood for Samsung. Toshiba SSDs are "APPLE SSD TS128C" so again, it's logical if TS stands for Toshiba.

If I had to guess, the SSD in newer MBAs is Samsung 470-series as that has speeds of 250/220 MB/s, which makes sense when looking at the benchmarks. Apart from the speed differences, it looks like the newer ones support Native Command Queuing while older ones don't.

how very logical of you :D are there any negatives to using the samsung chips as opposed to toshiba? i was always very skeptical of them :/
 

Hellhammer

Moderator emeritus
Dec 10, 2008
22,164
581
Finland
how very logical of you :D are there any negatives to using the samsung chips as opposed to toshiba? i was always very skeptical of them :/

Well, the old Samsungs suffered from pretty heavy degradation issues or so I've heard but that was something like 2008. A lot has happened in SSD world since that.
 

Goldfrapp

macrumors 603
Jul 31, 2005
5,081
7,022
US&A
Ultimate MacBook Air 13 (bought yesterday):

180.9 / 207.7

Revision: CJAA0201

So it turns out I was sold an older revision, right? That's why it's slower, right? I'm mad!!! :mad::mad::mad:

Should I have asked the sales person to pull out the latest revision? Is it even possible to identify one? :(
 
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