Re: USB da(4) quirks deprecated

From: Andrew Thompson (andy_at_fud.org.nz)
Date: 09/13/03

  • Next message: M. Warner Losh: "Re: devd/devctl" 
    Date: Sat, 13 Sep 2003 16:33:04 +1200
To: Nate Lawson <nate@root.org>

    Nate Lawson wrote:

    >>dmesg:
    >>umass0: SigmaTel, Inc. USBMSC Audio Player, rev 1.10/0.01, addr 3
    >>umass0: Get Max Lun not supported (IOERROR)
    >>Enabling quirks for device
    >>da0 at umass-sim0 bus 0 target 0 lun 0
    >>da0: <SigmaTel MSCN 0001> Removable Direct Access SCSI-4 device
    >>da0: 1.000MB/s transfers
    >>da0: 125MB (256001 512 byte sectors: 64H 32S/T 125C)
    >>
    >>
    >The NO_PREVENT support has been added. Does this work for you?
    > {
    > {T_DIRECT, SIP_MEDIA_REMOVABLE, "SigmaTel", "MSCN", "*"},
    > /*quirks*/ DA_Q_NO_SYNC_CACHE|DA_Q_NO_PREVENT
    > },
    >
    >
    >

    Yes, it does work :)

    I have just got around to trying this pen-drive again and have been
    trying tracking down data corruptions. If I mount the drive, write a
    file, umount/mount again the file is different.

    Using cmp I have found that there are consistent blocks of nulls in the
    written file where data should be. The block is always 0xfff bytes long
    and starts at 0x3000. I have tried many files and the offsets are
    always the same. All the other data in the file is correct and at the
    right location.

    0x3000 -> 0x3fff
    0x7000 -> 0x7fff
    0xb000 -> 0xbfff
    0xf000 -> 0xffff
    0x13000 -> 0x13fff
    ... and so on until the end of the file ...

    Any suggestions?

    Andy

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