On Fri, Mar 03, 2006 at 06:44:06AM +0100, Harald Hoyer wrote: > John Thacker wrote: > >>/dev/disk/by-id/ > > > >Which of course doesn't work for CDROMs > > > Huh? > > $ tree /dev/disk/by-id/ > /dev/disk/by-id/ > |-- ata-PIONEER_DVD-RW_DVR-105_BKDL086471WL -> ../../hdd Well, it certainly doesn't work on mine. From looking at the rules, it has something to do with both optical drives having no ID_SERIAL environment variable, since /dev/disk/by-id/ doesn't get created in that case. I was wondering if that was just me. I kind of assumed it wasn't, since the drives have different badges and one is a DVD-RW while one is a CDRW. $ udevinfo -q all -n /dev/hdc P: /block/hdc N: hdc S: cdrom S: cdrom-hdc S: dvd S: dvd-hdc S: cdwriter S: cdwriter-hdc S: cdrw S: cdrw-hdc S: dvdwriter S: dvdwriter-hdc S: dvdrw S: dvdrw-hdc S: disk/by-path/pci-0000:00:09.0-ide-1:0 E: ID_TYPE=cd E: ID_MODEL=_NEC_DVD_RW_ND-3520A E: ID_SERIAL= E: ID_REVISION=1.04 E: ID_BUS=ata E: ID_PATH=pci-0000:00:09.0-ide-1:0 $ udevinfo -q all -n /dev/hdd P: /block/hdd N: hdd S: cdrom S: cdrom-hdd S: cdwriter S: cdwriter-hdd S: cdrw S: cdrw-hdd S: disk/by-path/pci-0000:00:09.0-ide-1:1 E: ID_TYPE=cd E: ID_MODEL=LITE-ON_LTR-24102B E: ID_SERIAL= E: ID_REVISION=5S5A E: ID_BUS=ata E: ID_PATH=pci-0000:00:09.0-ide-1:1 compared to $ udevinfo -q all -n /dev/hda P: /block/hda N: hda S: disk/by-id/ata-WDC_WD1200JB-75CRA0_WD-WMA8C4186191 S: disk/by-path/pci-0000:00:09.0-ide-0:0 E: ID_TYPE=disk E: ID_MODEL=WDC_WD1200JB-75CRA0 E: ID_SERIAL=WD-WMA8C4186191 E: ID_REVISION=16.06V16 E: ID_BUS=ata E: ID_PATH=pci-0000:00:09.0-ide-0:0 and $ udevinfo -q all -n /dev/hdb P: /block/hdb N: hdb S: disk/by-id/ata-MAXTOR_6L080J4_664131818222 S: disk/by-path/pci-0000:00:09.0-ide-0:1 E: ID_TYPE=disk E: ID_MODEL=MAXTOR_6L080J4 E: ID_SERIAL=664131818222 E: ID_REVISION=A93.0500 E: ID_BUS=ata E: ID_PATH=pci-0000:00:09.0-ide-0:1 results in $ tree /dev/disk/by-id/ /dev/disk/by-id/ |-- ata-MAXTOR_6L080J4_664131818222 -> ../../hdb |-- ata-MAXTOR_6L080J4_664131818222-part1 -> ../../hdb1 |-- ata-WDC_WD1200JB-75CRA0_WD-WMA8C4186191 -> ../../hda |-- ata-WDC_WD1200JB-75CRA0_WD-WMA8C4186191-part1 -> ../../hda1 |-- ata-WDC_WD1200JB-75CRA0_WD-WMA8C4186191-part10 -> ../../hda10 |-- ata-WDC_WD1200JB-75CRA0_WD-WMA8C4186191-part2 -> ../../hda2 |-- ata-WDC_WD1200JB-75CRA0_WD-WMA8C4186191-part5 -> ../../hda5 |-- ata-WDC_WD1200JB-75CRA0_WD-WMA8C4186191-part6 -> ../../hda6 |-- ata-WDC_WD1200JB-75CRA0_WD-WMA8C4186191-part7 -> ../../hda7 |-- ata-WDC_WD1200JB-75CRA0_WD-WMA8C4186191-part8 -> ../../hda8 `-- ata-WDC_WD1200JB-75CRA0_WD-WMA8C4186191-part9 -> ../../hda9 John Thacker
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