Slow SSD? Thoughts on the cause?

[gustave]

I have 10.7.2 in a Z68MB. 2500K and 16 gigs RAM. Works great.
HD is a Patriot Pyro 120 gig that is supposed to have read and writes in excess of 500.
I am using MackMagic disk tests ( as others do for this test with much more success than me ) and am getting 120-130 write and 160-180 read.

I installed TRIM support from Multibeast and this did not help.

What could be the issue?

Some chipset SATA item I need to install from Multibeast?
Other ideas welcome.

This is supposed to be quite a fast SSD ( sata3 6gb/sec ) and I am just not seeing that.

Thanks for the help

 

[dsaltos]

Assuming your ssd is your boot drive and your home folder is on it:
In a terminal window:

time mkfile 4g ~/Downloads/test

:// make your calculations

time cp -p ~/Downloads/test ~/Downloads/test.2

:// make your calculations

 

[gustave]

Thanks. Both good timing methods.
I am seeing slow perfornace though with other tools, and wondering what could be the cause.

 

[dsaltos]

Blackmagic used to use compressible data which will give quite high numbers for most SSDs, since version 2.1, they have started to use incompressible data.

 

[gustave]

Maybe thats the cause.
What tool ( preferably free ) would be a better choice perhaps?

 

[dsaltos]

AJA system test

http://www.aja.com/ajashare/AJASystemTest.zip

Just pick your sdd and select a large file to create...