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    SubjectRe: CDMRW in 2.6
    On Friday 13 Aug 2004 07:15, Jens Axboe wrote:
    > On Mon, Aug 09 2004, Chris Clayton wrote:
    > > cdrom: hdc: mrw address space DMA selected
    > > cdrom open: mrw_status 'mrw complete'
    > > hdc: command error: status=0x51 { DriveReady SeekComplete Error }
    > > hdc: command error: error=0x54
    > > end_request: I/O error, dev hdc, sector 1048576
    > Command was aborted, probably the media isn't writable after all. Can
    > you try and force a full format with cdrwtool?


    Did you mean cdrwtool or cdmrw?

    I've done a format with cdrwtool (cdrwtool -t 10 -d /dev/hdc -q) but when I
    try and mount it (mount -o rw,noatime -t udf /dev/hdc /cdmrw) and mount gives
    the message:

    mount: block device /dev/hdc is write-protected, mounting read-only

    dmesg shows no error after cdrwtool has run but has the following new messages
    after the media is mounted:

    cdrom: hdc: mrw address space DMA selected
    cdrom open: mrw_status 'not mrw'
    UDF-fs INFO UDF (2004/29/09) Mounting volume 'LinuxUDF', timestamp
    2004/08/13 12:35 (1000)

    The media does, however, mount OK for packet writing (sudo mount -t udf -o
    rw,noatime /dev/pktcdvd/cdrw /cdrw) using another kernel patched with the
    packet writing patches Peter Osterlund has submitted for the -mm series.

    I'll try a full (as opposed to quick) blank with cdrwtool plus a forced format
    with cdmrw and report back when that has finished.

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