linux-kernel - Kernel 2.6.37 erroneously limiting to UDMA/33

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Date:	Wed, 05 Jan 2011 13:33:49 -0500
From:	Stephen Clark <sclark46@...thlink.net>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Kernel 2.6.37 erroneously limiting to UDMA/33

Hello,

Why is the kernel limiting me to udma/33 when the device says it can do
ata2.01: CFA: TRANSCEND, 20070831, max UDMA/66

There is no cable the compact flash is a socket on the motherboard!

Loading sd_mod.ko module
Loading libata.ko module
Loading ata_generic.ko module
Loading pata_acpi.ko module
pata_acpi 0000:00:0f.0: PCI INT B -> GSI 21 (level, low) -> IRQ 21
pata_acpi 0000:00:0f.0: PCI INT B disabled
Loading pata_via.ko module
scsi0 : pata_via
scsi1 : pata_via
ata1: PATA max UDMA/133 cmd 0x1f0 ctl 0x3f6 bmdma 0xfa00 irq 14
ata2: PATA max UDMA/133 cmd 0x170 ctl 0x376 bmdma 0xfa08 irq 15
ata2.01: CFA: TRANSCEND, 20070831, max UDMA/66
ata2.01: 7962192 sectors, multi 0: LBA
ata2.01: limited to UDMA/33 due to 40-wire cable
ata2.01: configured for UDMA/33
scsi 1:0:1:0: Direct-Access     ATA      TRANSCEND        2007 PQ: 0 ANSI: 5
sd 1:0:1:0: [sda] 7962192 512-byte logical blocks: (4.07 GB/3.79 GiB)
sd 1:0:1:0: [sda] Write Protect is off
sd 1:0:1:0: [sda] Write cache: disabled, read cache: enabled, doesn't 
support DA
  sda: sda1 sda2 sda3
sd 1:0:1:0: [sda] Attached SCSI disk
Loading ata_piix.ko module

Thanks,
Steve

-- 

"They that give up essential liberty to obtain temporary safety,
deserve neither liberty nor safety."  (Ben Franklin)

"The course of history shows that as a government grows, liberty
decreases."  (Thomas Jefferson)



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