Hrmmm, I have an LG 52/24/52 drive... i tried adding the mrw patch, but i seem to get syslog messages saying the following when i echo 1 > /dev/sr1 Jan 9 10:33:57 nigel-lappy kernel: blk: queue d42afe18, I/O limit 4095Mb (mask 0xffffffff) Jan 9 10:33:57 nigel-lappy kernel: Vendor: HL-DT-ST Model: CD-RW GCE-8520B Rev: 1.02 Jan 9 10:33:57 nigel-lappy kernel: Type: CD-ROM ANSI SCSI revision: 02 Jan 9 10:33:57 nigel-lappy kernel: blk: queue d42afc18, I/O limit 4095Mb (mask 0xffffffff) Jan 9 10:33:57 nigel-lappy kernel: Attached scsi CD-ROM sr1 at scsi1, channel 0, id 0, lun 0 Jan 9 10:33:57 nigel-lappy kernel: sr1: scsi3-mmc drive: 40x/40x writer cd/rw xa/form2 cdda tray Jan 9 10:33:57 nigel-lappy kernel: scsi singledevice 1 0 1 0 Jan 9 10:33:57 nigel-lappy kernel: scsi singledevice 1 0 2 0 Jan 9 10:33:57 nigel-lappy kernel: scsi singledevice 1 0 3 0 Jan 9 10:33:57 nigel-lappy kernel: scsi singledevice 1 0 4 0 Jan 9 10:33:57 nigel-lappy kernel: scsi singledevice 1 0 5 0 Jan 9 10:33:57 nigel-lappy kernel: scsi singledevice 1 0 6 0 Jan 9 10:33:57 nigel-lappy kernel: scsi singledevice 1 0 7 0 Jan 9 10:34:35 nigel-lappy kernel: cdrom: bash opening for WRITE Jan 9 10:34:35 nigel-lappy kernel: sr1: disc change detected. Jan 9 10:34:35 nigel-lappy kernel: cdrom: sr1: mrw address space GAA selected Jan 9 10:34:35 nigel-lappy kernel: cdrom open: mrw_status 'not mrw' i'm oviously doing something wrong :( On Fri, Jan 09, 2004 at 11:00:25AM +0100, Jens Axboe wrote:
On Fri, Jan 09 2004, Nigel Kukard wrote:
Hi guys,
Is it possible to do packet writing of variable sizes? I've applied the mrw patch to my kernel as i found on the site, but the only way it seems I can create a usable disk is if i use pktsetup with the -q option.
Is there a manual way to reserve a track & say format it with ext2 or so?
also what exactly is mrw? :)
mrw is mount rainier, and you don't need packet writing support for that (it's basically packet writing in firmware, with added defect management). so if you have a mrw capable drive and the small mrw patch, then you can access the drive like a hard drive.
-- Jens Axboe
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