/dev/dvd1 etc. disappeared OR: Two optical drives with same name?

[jack46]

Hi
I have 2 Optiarc DVD Drives (DVD RW AD-7280S) connected to a SiI 3114 controller. At boot they both show op. When running Mint (Nadia), I can access them as /dev/sr0 and /dev/sr1 respectively.
But the second drive has no symlinks
cd /dev
ll | grep 'sr[01]'
yields only
cdrom -> sr0 cdrw -> sr0 dvd -> sr0 and dvdrw -> sr0
sr0 sr1

cd disk/by-id/
ll | grep 'sr[01]'
yields
ata-Optiarc_DVD_RW_AD-7280S -> ../../sr0

cd disk/by-path/
ll | grep 'sr[01]'
yields
pci-0000:05:00.0-scsi-0:0:0:0 -> ../../sr0

When I connect one DVD drive to a different SATA controller, this changes to (nearly) what one expects.
cd /dev
ll | grep 'sr[01]'
yields
cdrom -> sr0 cdrw -> sr0 dvd -> sr0 and dvdrw -> sr0
cdrom1 -> sr1 cdrw1 -> sr1 dvd1 -> sr1 and dvdrw1 -> sr1
sr0 sr1

cd disk/by-id/
ll | grep 'sr[01]'
still yields only
ata-Optiarc_DVD_RW_AD-7280S -> ../../sr0

cd disk/by-path/
ll | grep 'sr[01]'
yields
pci-0000:05:00.0-scsi-0:0:0:0 -> ../../sr0
pci-0000:04:05.0-scsi-0:0:0:0 -> ../../sr1

Obviously the 2 DVD drives interfere with each other, when on the same controller.
Is this caused by
1. ata-Optiarc_DVD_RW_AD-7280S not having something unique (a serialnr) in its name? Like in SAMSUNG_HD103SJS246JD1B2050
a. would this mean a bug in the (udev?) naming scheme?
2. or is the SiI 3114 controller the culprit?

I'm running Mint on top of Ubuntu quantal
lsb_release -rd
Description: Linux Mint 14 Nadia
Release: 14

uname -a
Linux MyBox 3.5.0-39-generic #60-Ubuntu SMP Tue Aug 13 18:33:05 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

dpkg -l udev
ii udev 175-0ubuntu13 amd64 rule-based device node and kernel event manager

[jack46 (jack46)]

This bug is also described in bug #1084855, but here I guessed the reason for the bug
jack46