Works: 
CompactFlash ATA device, with removable media
        Model Number:       SanDisk SDCFB-128
        Serial Number:      101913J0803Q3424
        Firmware Revision:  Vdi 1.24
Standards:
        Likely used: 4
Configuration:
        Logical         max     current
        cylinders       980     497
        heads           8       8
        sectors/track   32      63
        --
        bytes/track: 0  bytes/sector: 576
        CHS current addressable sectors:     250488
        LBA    user addressable sectors:     250880
        device size with M = 1024*1024:         122 MBytes
        device size with M = 1000*1000:         128 MBytes
Capabilities:
        LBA, IORDY(may be)(cannot be disabled)
        Buffer size: 1.0kB      bytes avail on r/w long: 4      Queue depth: 1
        Standby timer values: spec'd by Vendor
        R/W multiple sector transfer: Max = 1   Current = 1
        DMA: not supported
        PIO: pio0 pio1 pio2 pio3 pio4
             Cycle time: no flow control=120ns  IORDY flow control=120ns


does not works:

ATA device, with non-removable media
        Model Number:       SanDisk SDCFB-128
        Serial Number:      109909E2004C5801
        Firmware Revision:  HDX 2.15
Standards:
        Supported: 10
        Likely used: 10
Configuration:
        Logical         max     current
        cylinders       980     980
        heads           8       8
        sectors/track   32      32
        --
        CHS current addressable sectors:     250880
        LBA    user addressable sectors:     250880
        device size with M = 1024*1024:         122 MBytes
        device size with M = 1000*1000:         128 MBytes
Capabilities:
        LBA, IORDY(may be)(cannot be disabled)
        Queue depth: 1
        Standby timer values: spec'd by Vendor
        R/W multiple sector transfer: Max = 1   Current = 1
        DMA: mdma0 mdma1 *mdma2
             Cycle time: min=120ns recommended=120ns
        PIO: pio0 pio1 pio2 pio3 pio4
             Cycle time: no flow control=120ns  IORDY flow control=120ns