Bug 43222 - SATA III recognized as SATA II (chipset intel z68)?
Summary: SATA III recognized as SATA II (chipset intel z68)?
Status: NEW
Alias: None
Product: IO/Storage
Classification: Unclassified
Component: Serial ATA (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: Jeff Garzik
URL: https://bugs.launchpad.net/ubuntu/+so...
Keywords:
Depends on:
Blocks:
 
Reported: 2012-05-09 17:50 UTC by Jason
Modified: 2016-03-07 15:17 UTC (History)
3 users (show)

See Also:
Kernel Version: 3.4-rc6
Subsystem:
Regression: No
Bisected commit-id:

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Description Jason 2012-05-09 17:50:03 UTC 
My SSD OCZ vertex 3 60Go SATAIII and my WesternDigital 500Go/s SATAIII are recognized as serial ata discs, according to palimpsest, without any distinction between SATA II drives, and SATA II drives. 

When I run hdparm -tT /dev/sd?, it returns me that my SSD works at 330Mo/s. The first time I have tested my SSD, hgparm returns me 360Mo/s. It never returned me this speed.

I have tested the same configuration under windows, and the SSD runs at 480Mo/s in average.

My chipset is the intel Z68, and I have updated both the motherboard's and SSD's BIOS. The AHCI mode is activated.

I work under ubuntu 12.04.

I have tested the kernel 3.0, 3.2, and 3.4 rc6. An improvement have been done between the kernel 3.0 to the kernel 3.2 (300Mo/s to 330Mo/s).
Comment 1 Jason 2012-05-09 17:53:45 UTC 
I work also with a 64bits distribution.
Comment 2 Jason 2012-10-20 09:34:47 UTC 
Nothing changed with the kernel 3.5.
Comment 3 Jason 2012-10-20 12:42:35 UTC 
Same thing with the kernel 3.7-rc1
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