WD10TPVT darn slow in MacBook Pro

[alexs77]

Hello!

I've bought and installed a WD10TPVT in a Mid 2009 MacBook Pro 13" Unibody system with 4 GB RAM and OS X 10.6.6. I ran the "AJA System Test" from http://www.aja.com/products/software/ and got:

Ie. with a file size of 128 MB, I get a result of 9 MB/s for write performance and 15 MB/s for read; with 2 GB, I get 35 MB/s and 38 MB/s. The system was pretty much idle when I ran the test. On some other forum, I found this result:

Ie. more than 70 MB/s! There are other reports which are in the same "speed range".

Granted, I don't know exactly what kind of system they've got. But my results seem to be extraordinary slow, don't they?

I used the OS X Diskutility to create 2 partitions on the drive - 960 GB for OS X with HFS+ Journal and 40 GB FAT for Bootcamp/Windows. On the OSX partition, there are about 760 GB available right now; I used CCC to transfer data from the old, original 250 GB disk to it. As I understand, CCC basically just does a filecopy from old -> new (using rsync, it seems). Per the "WD Advanced Format Technology Brief Flyer", on OSX, nothing needs (or even can?) be done for the Advanced Format / 4096 bytes/sector.

Any idea what might be causing the slowness?

Thanks,

Alexander

[Lawrence]

You need to align the guid partition first

[alexs77]

Lawrence,

how would you do that? According to the WD docs, on OSX, nothing needs to be done.

Do you have more information, please?

Thanks a lot,

Alexander

[jake_d]

Hello,

I could do with more information on this too.

I have the same HD in the same computer (2009 13" MBP, 8GB Ram, 10.6.6 etc.) and get pretty slow performance. 

cheers

jake

[alexs77]

jake_d,

I originally had slow performance as shown in my original test.

But when I now run it, it's fast, see http://min.us/mvb4LEB#3

On the min.us site, you can also find the AJASystemTest test program.

I am pretty sure, that I didn't do anything special to make it go fast (certainly not doing something as special as aligning it to 4k sectors manually - OSX might have done this by itself).

Sorry, I know this is not a perfect answer, but that's the way it is… 

Cheers,

Alexander

[jake_d]

mine seems to be way quicker than it was and I didnt do anything particular, repaired permissions etc, cleared out some trivia... everything seems to be groovy with this drive now

That little app is great for a quick **bleep** check, thanks for that and taking the time to reply.

best regards

jake