Hi all,
About three weeks ago I bought a 15" i7 Macbook Pro from the Apple Store at Doncaster in Melbourne, Australia.
Yesterday I started backing up some blu-ray with an USB BDROM drive. After some trial and error I noticed that the 'front' USB port (the one closer to the headphone jack) would consistently fail during the rip, whereas the 'back' USB port could complete the backup without issue. I also noticed that the back port was transferring the data at a higher rate.
This led me to download xbench to perform some tests with an external HFS+ formatted drive. Through xbench I was able to confirm that the front USB port appears to be operating at a significantly lower speed than the back one. These results are repeatable.
I'm posting to ask two questions. Firstly, has anyone else experienced this issue? Secondly, could someone please do me a favour and compare the two USB ports on their 2010 MacBook Pro with xbench?
As a disclaimer, I have replaced my optical drive with a caddy containing an Intel X25-M SDD but I don't think this would lead to the issues I'm having.
Thanks for any assistance you can provide.
Back USB Port
------------
Results 34.76
System Info
Xbench Version 1.3
System Version 10.6.3 (10D2094)
Physical RAM 4096 MB
Model MacBookPro6,2
Drive Type Seagate FreeAgent Go
Disk Test 34.76
Sequential 39.74
Uncached Write 45.07 27.67 MB/sec [4K blocks]
Uncached Write 44.75 25.32 MB/sec [256K blocks]
Uncached Read 25.26 7.39 MB/sec [4K blocks]
Uncached Read 60.52 30.41 MB/sec [256K blocks]
Random 30.89
Uncached Write 10.70 1.13 MB/sec [4K blocks]
Uncached Write 77.60 24.84 MB/sec [256K blocks]
Uncached Read 80.92 0.57 MB/sec [4K blocks]
Uncached Read 92.54 17.17 MB/sec [256K blocks]
Front USB Port
------------
Results 27.82
System Info
Xbench Version 1.3
System Version 10.6.3 (10D2094)
Physical RAM 4096 MB
Model MacBookPro6,2
Drive Type Seagate FreeAgent Go
Disk Test 27.82
Sequential 26.50
Uncached Write 24.92 15.30 MB/sec [4K blocks]
Uncached Write 25.61 14.49 MB/sec [256K blocks]
Uncached Read 20.56 6.02 MB/sec [4K blocks]
Uncached Read 43.25 21.74 MB/sec [256K blocks]
Random 29.28
Uncached Write 11.16 1.18 MB/sec [4K blocks]
Uncached Write 45.55 14.58 MB/sec [256K blocks]
Uncached Read 80.61 0.57 MB/sec [4K blocks]
Uncached Read 78.97 14.65 MB/sec [256K blocks]
About three weeks ago I bought a 15" i7 Macbook Pro from the Apple Store at Doncaster in Melbourne, Australia.
Yesterday I started backing up some blu-ray with an USB BDROM drive. After some trial and error I noticed that the 'front' USB port (the one closer to the headphone jack) would consistently fail during the rip, whereas the 'back' USB port could complete the backup without issue. I also noticed that the back port was transferring the data at a higher rate.
This led me to download xbench to perform some tests with an external HFS+ formatted drive. Through xbench I was able to confirm that the front USB port appears to be operating at a significantly lower speed than the back one. These results are repeatable.
I'm posting to ask two questions. Firstly, has anyone else experienced this issue? Secondly, could someone please do me a favour and compare the two USB ports on their 2010 MacBook Pro with xbench?
As a disclaimer, I have replaced my optical drive with a caddy containing an Intel X25-M SDD but I don't think this would lead to the issues I'm having.
Thanks for any assistance you can provide.
Back USB Port
------------
Results 34.76
System Info
Xbench Version 1.3
System Version 10.6.3 (10D2094)
Physical RAM 4096 MB
Model MacBookPro6,2
Drive Type Seagate FreeAgent Go
Disk Test 34.76
Sequential 39.74
Uncached Write 45.07 27.67 MB/sec [4K blocks]
Uncached Write 44.75 25.32 MB/sec [256K blocks]
Uncached Read 25.26 7.39 MB/sec [4K blocks]
Uncached Read 60.52 30.41 MB/sec [256K blocks]
Random 30.89
Uncached Write 10.70 1.13 MB/sec [4K blocks]
Uncached Write 77.60 24.84 MB/sec [256K blocks]
Uncached Read 80.92 0.57 MB/sec [4K blocks]
Uncached Read 92.54 17.17 MB/sec [256K blocks]
Front USB Port
------------
Results 27.82
System Info
Xbench Version 1.3
System Version 10.6.3 (10D2094)
Physical RAM 4096 MB
Model MacBookPro6,2
Drive Type Seagate FreeAgent Go
Disk Test 27.82
Sequential 26.50
Uncached Write 24.92 15.30 MB/sec [4K blocks]
Uncached Write 25.61 14.49 MB/sec [256K blocks]
Uncached Read 20.56 6.02 MB/sec [4K blocks]
Uncached Read 43.25 21.74 MB/sec [256K blocks]
Random 29.28
Uncached Write 11.16 1.18 MB/sec [4K blocks]
Uncached Write 45.55 14.58 MB/sec [256K blocks]
Uncached Read 80.61 0.57 MB/sec [4K blocks]
Uncached Read 78.97 14.65 MB/sec [256K blocks]