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    SubjectRe: MO-Drive under 2.4.7 usinf vfat

    Detlev Offenbach <> writes:

    > Hi all,
    > I have just tested the new 2.4.7 kernel to see, whether it now works with a
    > MO-Drive using the vfat filesystem. Unfortunately it still doesn't. Mounting
    > a disk and writing to it is ok. However, when I try to read a file off the
    > disk, the program crashes with a Segmentation fault and I get a oops in the
    > messages file (see attachment). I tried ksymoops on this file, but either I
    > did something wrong or it couldn't analyse it.

    Is the capacity of your MO disk more than 640M?
    In order to clarify a problem, please send the debugging output of FAT.

    ---------------------- start example --------------------------------
    $ mount -t vfat /dev/sda /mnt -o debug
    $ dmesg | tail
    Type: Optical Device ANSI SCSI revision: 02
    Attached scsi removable disk sda at scsi0, channel 0, id 5, lun 0
    sym53c875-0-<5,*>: asynchronous.
    SCSI device sda: 310352 2048-byte hdwr sectors (636 MB)
    sda: Write Protect is off
    MSDOS: Hardware sector size is 2048
    [MS-DOS FS Rel. 12,FAT 16,check=n,conv=b,uid=0,gid=0,umask=022]
    Transaction block size = 2048
    ---------------------- end example --------------------------------

    Perhaps, your MO disk will have the `ls' of a value smaller than 2048.
    Logical sector size smaller than device sector size cannot be handled
    with FAT of 2.4 series.

    OGAWA Hirofumi <>

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