Bug 43222

Summary:	SATA III recognized as SATA II (chipset intel z68)?
Product:	IO/Storage	Reporter:	Jason (jason.mahdjoub)
Component:	Serial ATA	Assignee:	Jeff Garzik (jgarzik)
Status:	NEW ---
Severity:	normal	CC:	alan, chris, szg00000
Priority:	P1
Hardware:	All
OS:	Linux
URL:	https://bugs.launchpad.net/ubuntu/+source/linux/+bug/889071
Kernel Version:	3.4-rc6	Subsystem:
Regression:	No	Bisected commit-id:

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