who is broken when buring is working with one burner and not with the other....

[dragoran <dragoran feuerpokemon de>]

I have to burners installed
1,0,0   100) 'PLEXTOR ' 'DVDR   PX-755A  ' '1.02' Removable CD-ROM
1,1,0   101) 'LITE-ON ' 'LTR-52246S      ' '6S0F' Removable CD-ROM
the second one works fine the first one only as root.
cdrecord: Operation not permitted. Cannot send SCSI cmd via ioctl
why? is this because the plextor supports some command that kernel does 
not allow for non root users? (no messages in dmesg exept scsi: unknown 
opcode 0xe9 )
or is cdrecord simply broken?
where should I fill a bug
kernel or cdrecord?
it was working fine on FC4 and it seems to work fine with growisofs (for 
dvds)
now I am using FC5 x86_64 with kernel-2.6.16-1.2080_FC5 on a dual core 
opteron box.