Tejun Heo schrieb:
I don't know very well about CF but does it even fill UDMA/33?  What
does 'dd if=/dev/sdc of=/dev/null bs=1M count=16 iflag=direct' say?  You
can increase count for more reliable result.

16+0 Datensätze ein
16+0 Datensätze aus
16777216 Bytes (17 MB) kopiert, 0,561688 s, 29,9 MB/s

And hdparm -I /dev/sdc says it should be compatible to udma5.


ATA device, with non-removable media
        Model Number:       SanDisk SDCFX4-8192
        Serial Number:      010611E2297S0510
        Firmware Revision:  HDX 4.20
        Supported: 4
        Likely used: 4
        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)
        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
        Enabled Supported:
                Write cache
           *    CFA feature set

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