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    SubjectTrouble using some (fast) compact flash as ide device on an embedded system
    As I reported in bug 8036 in,

    Hardware Environment:

    - Use a compact flash SanDisk SDCFB-128 Firmware revision HDX 2.15
    (we used other compact flashes with the same hw ad sw for years
    with no trouble)

    It happens on both etx boards:
    - VIA SOM-ETX (4475)
    - Gene-4312

    Doing the command
    sfdisk -R /dev/hdc


    * * *
    ide1: start_request: current=0xc6ebe754 (rq->sect=0,block 0)
    hdc: status error: status=0x58 { DriveReady SeekComplete DataRequest }
    ide: failed opcode was: unknown
    hdc: drive not ready for command
    ide1: start_request: current=0xc6ebe754 (rq->sect=0,block 0)
    hdc: do_special: 0x02
    hdc: do_special: recalibrate
    ide1: start_request: current=0xc6ebe754 (rq->sect=0,block 0)
    hdc: reading: block=0 sectors=8, buffer = 0xc6cd40000
    ide1: end_request: current=0xc6ebe754
    * * *

    the 'bad bit' in status error is DataRequest

    sfdisk -l /dev/hdc


    * * *
    ide1: start_request: current=0xc6ebecd4 (rq->sect=0,block 0)
    hdc: reading: block=0, sectors=32, buffer=0xc6f37000
    hdc: lost interrupt
    hdc: lost interrupt [and so on several times]
    * * *

    I have no knowledge of the internals of the linux kernel, but I'm a
    programmer and have both hardware and time to spend on solving this issue.

    Thanks for suggestions...

    Marco Lazzarotto
    Robox s.p.a.

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