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    SubjectRe: 2.4.27rc2, DVD-RW support broke DVD-RAM writes
    Date
    > what you see in 2.4.27-rc3 when you try:
    > sudo blockdev --getro /dev/hd*

    Sorry, never mind, I can now reproduce this effect myself, because
    Michael Tilelli kindly lent me a PATAPI DVD-RAM drive.

    We must have an asymmetry in 2.4 drivers/ide/ide-cd.c vs.
    drivers/scsi/sr.c. I see 2.4.26 work, but then 2.4.27-rc3 chokes:

    $ uname -msr
    Linux 2.4.27-rc4 i686
    $
    $ sudo rrd scan /dev/hdd
    /dev/hdd is MATSHITA DVD-RAM A127 not RRD
    $
    $ sudo dd if=/dev/hdd bs=32K skip=0 count=1 | hexdump -C
    00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    |................|
    *
    1+0 records in
    1+0 records out
    00008000
    $ sudo dd of=/dev/hdd bs=32K skip=0 count=1 <xae.bin
    dd: opening `/dev/hdd': Read-only file system
    $ sudo blockdev --getro /dev/hdd
    0
    $

    Pat LaVarre

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