Anyone use Black Magic Disk Speed test from the App Store?

[Boyd01]

So I'm guessing that the same can be send for these results taken from my Macbook Pro 8.2 / I7 2.3 / 16G RAM. This has the BTO APPLE SSD TS512C 500G.

Are those speeds are from a SSD? The write speed is terrible, I get around 180MB/sec read/write on several cheap external USB 3.0 hard drives.

I have the stock Apple 256gb SSD on a 2012 quad Mini server and it gets better than 450 MB/sec write and 500 read. My 2013 MBA with the Apple 512gb SSD gets about 700 MB/sec write and over 700 read.

 

[cruisin]

Are those speeds are from a SSD? The write speed is terrible, I get around 180MB/sec read/write on several cheap external USB 3.0 hard drives.

I have the stock Apple 256gb SSD on a 2012 quad Mini server and it gets better than 450 MB/sec write and 500 read. My 2013 MBA with the Apple 512gb SSD gets about 700 MB/sec write and over 700 read.

Sata II is limited to 3Gb/s, and USB 3 can reach 5Gb/s, while the Air and Mini is PCI Express 5.0 Gb/s dual lane. If you have the newer PCIExpress-based SSD then you will have more speed.

 

[Boyd01]

Sata II is limited to 3Gb/s

Sure, but his screenshot showed a SSD with write speed of only about 1GB/sec and read of 1.5GB/sec.

 

[tcho100]

I'm a bit thrown now, so are the SSD's underperforming?

 

[Boyd01]

I'm still not sure I understand the screenshot you posted. It showed a BlackMagic test result of 130MB/sec write and 193MB/sec read. You said they were from a "Macbook Pro 8.2 / I7 2.3 / 16G RAM. This has the BTO APPLE SSD TS512C 500G". Those speeds look more like a hard drive than a SSD.

Note that you are actually posting in a thread about the SSD in the MacBook Air, but it was started in 2011 and people were seeing write performance of over 200MB/sec. I'm surprised that the more expensive MBP with the 512gb SSD is so much slower. The biggest SSD available on the MBA was 256gb in 2011, and larger SSD's are usually faster.

 

[tcho100]

Noted inre the MBA thread, didn't see one outside of here. As quoted this was top speccing BTO when I bought it several years ago. As previous the boot time etc are fast as. Its only recently when I started running El Capitan (was a snow leopard die hard) that I was able to use the black magic app to scan my drive. More miffed that its actually slower than the the older Mini???

Model Name: MacBook Pro
Model Identifier: MacBookPro8,2
Processor Name: Intel Core i7
Processor Speed: 2.3 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 8 MB
Memory: 16 GB
Boot ROM Version: MBP81.0047.B2C
SMC Version (system): 1.69f3
Serial Number (system): C02FJ27QDF91
Hardware UUID: 1B9F39FC-1837-580F-862D-8592522E4299



APPLE SSD TS512C:

Capacity: 500.28 GB (500,277,790,720 bytes)
Model: APPLE SSD TS512C
Revision: CJAA0201
Serial Number: 317S10L2TLOZ
Native Command Queuing: No
Removable Media: No
Detachable Drive: No
BSD Name: disk0
Medium Type: Solid State
TRIM Support: Yes
Partition Map Type: GPT (GUID Partition Table)
S.M.A.R.T. status: Verified

 

[Jack Neill]

MB 7,1 Mid 2010 Raid 0 2x 512. 408/511.

 

[Marx55]

Is there a way to configure Blackmagic Disk Speed Test to automatically STOP at the end of the read/write test (MAXIMUM SCORES) to take a screen capture? Otherwise it is impossible to capture the maximum scores!

 

[avatar1349]

244 MB/s Write 216 MB/s Read. Samsung 128 GB model.

Macbook Air Early 2015 on wifi with 1 TB of OWC SSD