Compact Flash card limited to UDMA2 (sandisk+epia sn)

rorist · 04-16-2009, 01:10 PM

Hello there,

I've got a problem that I'm stuck for several days now.

I have a compact flash card SanDisk SDCFX3, of 8Go, that support udma4, but it uses udma2.

Here is my setup:

- The systeme is on /dev/hda wich is the CF card
- Data are on a soft raid, wich includes /var/log and /home
- I have an Epia SN motherboard with Type I CF socket (shared with IDE)
- I have checked in the BIOS settings that DMA is handle either by the host or the device
- Using Debian Lenny on 2.6.26-1-686

Here is some output:

Code:

hdparm -I /dev/hda

/dev/hda:

CompactFlash ATA device
        Model Number:       SanDisk SDCFX3-008G                     
        Serial Number:      011709H2008G3851
        Firmware Revision:  HDX 4.32
Standards:
        Supported: 4 
        Likely used: 4
Configuration:
        Logical         max     current
        cylinders       15880   15880
        heads           16      16
        sectors/track   63      63
        --
        CHS current addressable sectors:   16007040
        LBA    user addressable sectors:   16007040
        device size with M = 1024*1024:        7815 MBytes
        device size with M = 1000*1000:        8195 MBytes (8 GB)
Capabilities:
        LBA, IORDY(may be)(cannot be disabled)
        Standby timer values: spec'd by Vendor
        R/W multiple sector transfer: Max = 4   Current = 0
        DMA: mdma0 mdma1 mdma2 udma0 udma1 *udma2 udma3 udma4 
             Cycle time: min=120ns recommended=120ns
        PIO: pio0 pio1 pio2 pio3 pio4 
             Cycle time: no flow control=120ns  IORDY flow control=120ns
Commands/features:
        Enabled Supported:
                Write cache
           *    CFA feature set
           *    CFA advanced modes: pio5 *pio6

Code:

cat /var/log/messages |grep hda
Apr 16 19:26:22 localhost kernel: [    0.000000] Kernel command line: root=/dev/hda1 ro pci=noacpi
Apr 16 19:26:22 localhost kernel: [    6.140177] hda: SanDisk SDCFX3-008G, CFA DISK drive
Apr 16 19:26:22 localhost kernel: [    6.812166] hda: drive side 80-wire cable detection failed, limiting max speed to UDMA33
Apr 16 19:26:22 localhost kernel: [    6.812249] hda: UDMA/33 mode selected
Apr 16 19:26:22 localhost kernel: [   10.752341] hda: max request size: 128KiB
Apr 16 19:26:22 localhost kernel: [   10.752413] hda: 16007040 sectors (8195 MB) w/1KiB Cache, CHS=15880/16/63
Apr 16 19:26:22 localhost kernel: [   10.752649]  hda: hda1

If someone has the same setup or an idea how to fix this, i would be very gratefull. Thanks

Crito · 04-17-2009, 08:17 AM

Quote:

drive side 80-wire cable detection failed, limiting max speed to UDMA33

Says it thinks you're using a 40 conductor IDE cable instead of an 80-pin.

rorist · 04-18-2009, 07:56 AM

Ok, I have a 50pins connector for the card. But is it normal that it uses the IDE drivers and not libsata ?
I tried to patch libsata and there i found it's not in use.

I'll try to force udma4 in the ide drivers.

Any suggestion ?

Thanks