Ever since creating a persistent knoppix.img on my USB Flash drive and using that as my persistant home, system, settings, I have a problem with using the 2nd cd drive, the one without the Knoppix DVD (5.3.1) in it.
Before using persistent, only the Knoppix DVD had an icon on the desktop and inserting a cd or dvd into the 2nd drive created an icon I could mount, open the cd/dvd, etc.
Now, there are always icons there for hdc and hdd, as well as the Knoppix DVD and right clicking to mount them after inserting a disc pops up an error box stating that I need hal for this. All the hal stuff is installed and I've made no changes to the KDE removable media settings.
No new icon appears when inserting a cd/dvd. I checked in K3b and it sees and is able to mount/view/unmount the inserted disc.
Then I opened KwikDisk, chose the drive with the inserted cd/dvd, and it mounted it. It created an additional folder for it in /media, bypassing the cdrom or other folders already there that the disc would ordinarily be mounted in.
Opening the new folder in /media accesses the disc perfectly and I'm able to copy files from it to my home folder or wherever. Then I right click KwikDisk again to unmount it and then remove the cd/dvd and close KwikDisk.
Apparently something changes the mounting behavior when using the USB Flash drive to run a persistent Knoppix image. Does anyone know if this is by design, a bug, something I can fix to restore normal Knoppix behavior?
The KDE autorun stuff does not run either. You know, that window that appears asking what to do with the newly detected media. Something got broken here. I made no fstab changes and it's just like Knoppix sets it up so I can't figure out what's going on here.
I haven't tried playing cd's or dvd's with this wacky setup yet. They worked fine without the persistent image, using just the Knoppix DVD to run things. Haven't tried, but I can't see how the players will find the cd or dvd this way.
Just in case you're wondering, it's a Sandisk Cruiser Micro 8GB USB Flash drive with a 3880MB persistent knoppix.img file. I had uninstalled u3, so there's nothing weird on there that should effect the cd drives.

Dell 6P85J 4TB ST4000NM0063 7.2k 6Gb/s 3.5” SAS SED Hard Drive with Tray
$39.99
Western Digital HUS726T4TAL5204 4TB 7.2K SAS 12Gb/s 3.5" 512e HDD NetApp X375A
$64.00
Western Digital 1TB 3.5" SATA III 7200RPM Desktop Hard Drive
$34.99
DELL 2TB Enterprise HDD (7200RPM, 3.5", SATA III, 128MB Cache) HUS722T2TALA600
$49.95
Seagate ST4000NM0034 Enterprise 4TB 7200RPM SAS 12Gb/s HDD v4
$39.00
Seagate ST500DM009 BarraCuda 500 GB 3.5" SATA III Desktop Hard Drive
$14.99
Seagate 3.5" Desktop HDD 3TB SATA III 6Gbps HDD 1ER166-510
$39.99
Dell ST6000NM0034 1HT27Z-150 NWCCG 6TB SAS 3.5 7.2K ENTERPRISE SERVER DRIVE
$68.99
Seagate ST8000NM0075 Enterprise Capacity 3.5 HDD 8TB SAS Hard Drive 8TB EXOS
$184.99
Seagate ST12000NM0127 12TB 256MB 7200RPM 3.5" SATA 6.0Gb/s Enterprise Hard Drive
$318.99