From mboxrd@z Thu Jan  1 00:00:00 1970
From: Moshe Yudkowsky <moshe@pobox.com>
Date: Thu, 29 Dec 2005 00:10:24 +0000
Subject: Re: new version of udev has different cd/dvd devices
Message-Id: <43B32970.1070101@pobox.com>
List-Id: <linux-hotplug.vger.kernel.org>
References: <43B313ED.40402@bl.com>
In-Reply-To: <43B313ED.40402@bl.com>
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To: linux-hotplug@vger.kernel.org

Marco d'Itri wrote:
> On Dec 28, Moshe Yudkowsky <msha5_17@bl.com> wrote:
>=20
>=20
>>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}=3D"?*",            SYMLINK+=3D"cdrom%e"
> ENV{ID_CDROM_CD_RW}=3D"?*",      SYMLINK+=3D"cdrw%e"
> ENV{ID_CDROM_DVD}=3D"?*",        SYMLINK+=3D"dvd%e"
> ENV{ID_CDROM_DVD_R}=3D"?*",      SYMLINK+=3D"dvdrw%e"


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

> ENV{ID_CDROM}=3D"?*",		SYMLINK+=3D"cdrom"
> ENV{ID_CDROM_CD_RW}=3D"?*",	SYMLINK+=3D"cdrw"
> ENV{ID_CDROM_DVD}=3D"?*",	SYMLINK+=3D"dvd"
> ENV{ID_CDROM_DVD_R}=3D"?*",	SYMLINK+=3D"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/targe=
t1/lun0/cd
> lrwxrwxrwx 1 root root 30 Dec 28 17:29 /dev/cdrw -> ide/host0/bus1/target=
1/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=3D3
> ACTION=3Dremove
> DEVPATH=3D/block/hdd
> SUBSYSTEM=3Dblock
> SEQNUM=1166
> MINORd
> MAJOR"
> PHYSDEVPATH=3D/devices/ide1/1.1
> PHYSDEVBUS=3Dide
> PHYSDEVDRIVER=3Dide-cdrom
> UDEVD_EVENT=3D1
> DEVNAME=3D/dev/ide/host0/bus1/target1/lun0/cd
> ID_CDROM=3D1
> ID_CDROM_CD_R=3D1
> ID_CDROM_CD_RW=3D1
> ID_CDROM_DVD=3D1
> ID_CDROM_DVD_R=3D1
> ID_CDROM_MRW=3D1
> ID_CDROM_MRW_W=3D1
> ID_CDROM_RAM=3D1
> ID_TYPE=CD
> ID_MODEL=3DTSSTcorpCDDVDW_TS-H552B
> ID_SERIAL=3DTS-H552BFirmware
> ID_REVISION=3DTS04
> ID_BUS=3Data
> ID_PATH=3Dpcmcia--ide-1:1

Next comes the 1,0,0 drive:

> UDEV  [1135814449.429480] remove@/block/hdc
> UDEV_LOG=3D3
> ACTION=3Dremove
> DEVPATH=3D/block/hdc
> SUBSYSTEM=3Dblock
> SEQNUM=1167
> MINOR=3D0
> MAJOR"
> PHYSDEVPATH=3D/devices/ide1/1.0
> PHYSDEVBUS=3Dide
> PHYSDEVDRIVER=3Dide-cdrom
> UDEVD_EVENT=3D1
> DEVNAME=3D/dev/ide/host0/bus1/target0/lun0/cd
> ID_CDROM=3D1
> ID_CDROM_CD_R=3D1
> ID_CDROM_CD_RW=3D1
> ID_CDROM_DVD=3D1
> ID_CDROM_MRW=3D1
> ID_CDROM_MRW_W=3D1
> ID_CDROM_RAM=3D1
> ID_TYPE=CD
> ID_MODEL=3DHL-DT-ST_RWDVD_GCC-4320B
> ID_SERIAL> ID_REVISION=3D1.01
> ID_BUS=3Data
> ID_PATH=3Dpcmcia--ide-1:0

In other words, the rules match either drive completely, if I'm reading=20
the rules correctly.

In the meantime, I've modified fstab to use /dev/cdroms/cdrom{0,1}, but=20
it'd be nice to figure out what happened here!


--=20
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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