From: Jeff Garzik <jeff@garzik.org>
To: Paul Menzel <paulepanter@users.sourceforge.net>
Cc: linux-ide@vger.kernel.org
Subject: Re: Asus M2V-MX SE (VIA K8T890): SATA-II disk only detected as UDMA/100
Date: Wed, 22 Jun 2011 20:22:11 -0400 [thread overview]
Message-ID: <4E028733.5000100@garzik.org> (raw)
In-Reply-To: <1308751011.16578.36.camel@mattotaupa>
On 06/22/2011 09:56 AM, Paul Menzel wrote:
> Dear SATA subsystem folks,
>
>
> please keep my address in CC list since I am not subscribed.
>
> This is a reply to my message to the coreboot list [1] and I am adding
> more current information to it.
>
>
> Am Sonntag, den 19.06.2011, 20:30 +0200 schrieb Paul Menzel:
>
> the ASUS M2V-MX SE HAS A VIA K8T890 chipset and the following BIOS
> version is used.
>
>> $ sudo dmidecode
>> […]
>> # dmidecode 2.9
>> SMBIOS 2.4 present.
>> 49 structures occupying 1801 bytes.
>> Table at 0x000F0740.
>>
>> Handle 0x0000, DMI type 0, 24 bytes
>> BIOS Information
>> Vendor: American Megatrends Inc.
>> Version: 0304
>> Release Date: 10/30/2007
>> Address: 0xF0000
>> Runtime Size: 64 kB
>> ROM Size: 512 kB
>> […]
>>
>> I had to replace my hard drive and bought a new SATA-II disk.
>> Unfortunately the full speed is not detected. Instead of UDMA/133 – as
>> was used with the old SATA-I disk – it is reporting UDMA/100.
>>
>> $ uname -a
>> Linux joe 2.6.32-5-amd64 #1 SMP Tue Mar 8 22:49:26 UTC 2011 x86_64 GNU/Linux
>> $ dmesg # new SATA-II disk
>> […]
>> [ 0.792878] ata3: SATA max UDMA/133 cmd 0xec00 ctl 0xe880 bmdma 0xe400 irq 21
>> [ 0.792881] ata4: SATA max UDMA/133 cmd 0xe800 ctl 0xe480 bmdma 0xe408 irq 21
>> […]
>> [ 1.384015] ata4: SATA link up 1.5 Gbps (SStatus 123 SControl 300)
>> [ 1.392019] usb 2-1: new low speed USB device using uhci_hcd and address 2
>> [ 1.548219] ata4.00: ATA-8: WDC WD20EARS-60MVWB0, 51.0AB51, max UDMA/100
>>
>> Here seems to be the problematic line, that somehow the drive is
>> reporting the wrong maximum speed or the chipset does not detect it
>> correctly.
UDMA setting is a legacy of PATA, and tends to have very little
relevance to SATA.
I wouldn't worry about it unless you are actually measuring low
performance, as opposed to just looking at dmesg.
Jeff
next prev parent reply other threads:[~2011-06-23 0:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1308508217.4141.20.camel@mattotaupa>
2011-06-22 13:56 ` Asus M2V-MX SE (VIA K8T890): SATA-II disk only detected as UDMA/100 Paul Menzel
2011-06-23 0:22 ` Jeff Garzik [this message]
2011-06-24 5:08 ` Robert Hancock
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