Messages in this thread | | | Date | Thu, 06 Jan 2011 10:26:43 -0500 | From | Stephen Clark <> | Subject | Re: Kernel 2.6.37 erroneously limiting to UDMA/33 |
| |
On 01/05/2011 06:50 PM, Robert Hancock wrote: > (CCing linux-ide) > > On 01/05/2011 12:33 PM, Stephen Clark wrote: >> 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! > > The kernel has no way to know that, and presumably the board isn't > connecting the signal for IDE pin 34 to ground in order to properly > signal that an 80-wire cable (or equivalent) is connected so that > speeds over UDMA33 can be used. > > You should be able to use the libata.force=80c option on the kernel > command line to override the cable detection. > >> >> 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 >> > Thanks, I'll give that a shot.
--
"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)
| |