Re: new version of udev has different cd/dvd devices

[Moshe Yudkowsky <moshe@pobox.com>]

Marco d'Itri wrote:
> On Dec 28, Moshe Yudkowsky <msha5_17@bl.com> wrote:
> 
> 
>>The latest udev (0.079) puts the second drive only for /dev/cdrom, cdrw, 
>> dvd, and dvdrw.

the udev distro under Debian has these rules:

> ENV{ID_CDROM}="?*",            SYMLINK+="cdrom%e"
> ENV{ID_CDROM_CD_RW}="?*",      SYMLINK+="cdrw%e"
> ENV{ID_CDROM_DVD}="?*",        SYMLINK+="dvd%e"
> ENV{ID_CDROM_DVD_R}="?*",      SYMLINK+="dvdrw%e"


When I modify them to remove the "%e":

> ENV{ID_CDROM}="?*",		SYMLINK+="cdrom"
> ENV{ID_CDROM_CD_RW}="?*",	SYMLINK+="cdrw"
> ENV{ID_CDROM_DVD}="?*",	SYMLINK+="dvd"
> ENV{ID_CDROM_DVD_R}="?*",	SYMLINK+="dvdrw"

followed by rmmod ide-cd, modprobe ide-cd, I get the same behavior:

> lrwxrwxrwx 1 root root 30 Dec 28 17:29 /dev/cdrom -> ide/host0/bus1/target1/lun0/cd
> lrwxrwxrwx 1 root root 30 Dec 28 17:29 /dev/cdrw -> ide/host0/bus1/target1/lun0/cd

I.e., they're both pointing to the same drive.

udevmonitor --env reveals what the problem seems to be:

First comes the 1,1,0 drive:

> UDEV  [1135814449.322164] remove@/block/hdd
> UDEV_LOG=3
> ACTION=remove
> DEVPATH=/block/hdd
> SUBSYSTEM=block
> SEQNUM\x1166
> MINORd
> MAJOR"
> PHYSDEVPATH=/devices/ide1/1.1
> PHYSDEVBUS=ide
> PHYSDEVDRIVER=ide-cdrom
> UDEVD_EVENT=1
> DEVNAME=/dev/ide/host0/bus1/target1/lun0/cd
> ID_CDROM=1
> ID_CDROM_CD_R=1
> ID_CDROM_CD_RW=1
> ID_CDROM_DVD=1
> ID_CDROM_DVD_R=1
> ID_CDROM_MRW=1
> ID_CDROM_MRW_W=1
> ID_CDROM_RAM=1
> ID_TYPEÍ
> ID_MODEL=TSSTcorpCDDVDW_TS-H552B
> ID_SERIAL=TS-H552BFirmware
> ID_REVISION=TS04
> ID_BUS=ata
> ID_PATH=pcmcia--ide-1:1

Next comes the 1,0,0 drive:

> UDEV  [1135814449.429480] remove@/block/hdc
> UDEV_LOG=3
> ACTION=remove
> DEVPATH=/block/hdc
> SUBSYSTEM=block
> SEQNUM\x1167
> MINOR=0
> MAJOR"
> PHYSDEVPATH=/devices/ide1/1.0
> PHYSDEVBUS=ide
> PHYSDEVDRIVER=ide-cdrom
> UDEVD_EVENT=1
> DEVNAME=/dev/ide/host0/bus1/target0/lun0/cd
> ID_CDROM=1
> ID_CDROM_CD_R=1
> ID_CDROM_CD_RW=1
> ID_CDROM_DVD=1
> ID_CDROM_MRW=1
> ID_CDROM_MRW_W=1
> ID_CDROM_RAM=1
> ID_TYPEÍ
> ID_MODEL=HL-DT-ST_RWDVD_GCC-4320B
> ID_SERIAL> ID_REVISION=1.01
> ID_BUS=ata
> ID_PATH=pcmcia--ide-1:0

In other words, the rules match either drive completely, if I'm reading 
the rules correctly.

In the meantime, I've modified fstab to use /dev/cdroms/cdrom{0,1}, but 
it'd be nice to figure out what happened here!


-- 
Moshe Yudkowsky * moshe@pobox.com * www.pobox.com/~moshe
  "The price of a tyrant's victory is eternal vigilance... This was
   once considered the price of liberty. Nothing buys what it used to."
    				-- Pat Cadigan


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