I have a Samsung 830 SSD hooked up to a Dell PERC 6/I controller (http://www.dell.com/content/topics/topic.aspx/global/products/pvaul/topics/en/us/raid_controller?c=us&l=en&cs=555) using a GreatLink C13214-001 SATA cable.
I have 3 other drives attached to the controller.
I'm aware that the controller is capped at 3 Gb/s but I am getting read/write speeds around 130 MB/s only.
Winsat returns:
> Disk Sequential 64.0 Read 132.31 MB/s 7.0
> Disk Random 16.0 Read 123.94 MB/s 7.3
> Responsiveness: Average IO Rate 1.58 ms/IO 7.4
> Responsiveness: Grouped IOs 10.90 units 7.0
> Responsiveness: Long IOs 4.50 units 7.8
> Responsiveness: Overall 49.01 units 7.0
> Responsiveness: PenaltyFactor 0.0
> Disk Sequential 64.0 Write 125.40 MB/s 7.0
> Average Read Time with Sequential Writes 0.540 ms 7.9
> Latency: 95th Percentile 0.849 ms 7.9
> Latency: Maximum 60.512 ms 7.8
> Average Read Time with Random Writes 0.480 ms 7.9
SiSoft Sandra returns similar values.
I have TRIM enabled, AHCI enabled, and I have followed all the steps in the performance tweaking guides to no avail (disabling indexing, prefetch/superfectch, defrag, restore, pagefile, etc).
Does anyone have any ideas? I should be getting 2.5-3x faster speeds (3 Gb/s = 375 MB/s - even with some of the bandwith sacrificed I should at least be neighboring 300 MB/s)
I have 3 other drives attached to the controller.
I'm aware that the controller is capped at 3 Gb/s but I am getting read/write speeds around 130 MB/s only.
Winsat returns:
> Disk Sequential 64.0 Read 132.31 MB/s 7.0
> Disk Random 16.0 Read 123.94 MB/s 7.3
> Responsiveness: Average IO Rate 1.58 ms/IO 7.4
> Responsiveness: Grouped IOs 10.90 units 7.0
> Responsiveness: Long IOs 4.50 units 7.8
> Responsiveness: Overall 49.01 units 7.0
> Responsiveness: PenaltyFactor 0.0
> Disk Sequential 64.0 Write 125.40 MB/s 7.0
> Average Read Time with Sequential Writes 0.540 ms 7.9
> Latency: 95th Percentile 0.849 ms 7.9
> Latency: Maximum 60.512 ms 7.8
> Average Read Time with Random Writes 0.480 ms 7.9
SiSoft Sandra returns similar values.
I have TRIM enabled, AHCI enabled, and I have followed all the steps in the performance tweaking guides to no avail (disabling indexing, prefetch/superfectch, defrag, restore, pagefile, etc).
Does anyone have any ideas? I should be getting 2.5-3x faster speeds (3 Gb/s = 375 MB/s - even with some of the bandwith sacrificed I should at least be neighboring 300 MB/s)