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Date: Fri, 2 May 2008 11:44:58 -0400
From: Dave Jones <davej@...emonkey.org.uk>
To: linux-ide@...r.kernel.org
Cc: Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Remove Asus EEE UDMA/33 limitation.
The Asus Eee PC prints this during bootup..
ata2.00: limited to UDMA/33 due to 40-wire cable
Which is unfortunate, as it has..
ata2.00: ATA-4: SILICONMOTION SM223AC, , max UDMA/66
I believe there actually is no cable, and the flash is directly
connected to the controller.
[root@eee ~]# hdparm -t /dev/sda
/dev/sda:
Timing buffered disk reads: 64 MB in 3.08 seconds = 20.76 MB/sec
With the patch below it returns..
/dev/sda:
Timing buffered disk reads: 76 MB in 3.04 seconds = 25.04 MB/sec
Signed-off-by: Dave Jones <davej@...hat.com>
--- linux-2.6.24.noarch/drivers/ata/ata_piix.c~ 2008-03-31 23:43:05.000000000 -0400
+++ linux-2.6.24.noarch/drivers/ata/ata_piix.c 2008-03-31 23:44:34.000000000 -0400
@@ -716,6 +716,7 @@ struct ich_laptop {
static const struct ich_laptop ich_laptop[] = {
/* devid, subvendor, subdev */
+ { 0x2653, 0x1043, 0x82d8 }, /* ICH6M on Asus Eee PC */
{ 0x27DF, 0x0005, 0x0280 }, /* ICH7 on Acer 5602WLMi */
{ 0x27DF, 0x1025, 0x0102 }, /* ICH7 on Acer 5602aWLMi */
{ 0x27DF, 0x1025, 0x0110 }, /* ICH7 on Acer 3682WLMi */
--
http://www.codemonkey.org.uk
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