My slot-loading optical drive (HP BDDVDRW CA21N) spins and up and then ejects every disc, a process that takes about 15 seconds. I've found lots of posts on enabling wanted ejects, but close to nothing on avoiding unwanted ones.
I have tried commenting out the relevant line in /etc/fstab, and using sudo sysctl dev.cdrom.lock=1, both making no change. /sys/bus/scsi/devices/0\:0\:0\:0/device_b* seems to always contain zeroes. Further system information follows:
brick@dowland:~$ uname -a
Linux dowland 5.10.0-9-amd64 #1 SMP Debian 5.10.70-1 (2021-09-30) x86_64 GNU/Linux
brick@dowland:~$ sudo modprobe sr_mod
brick@dowland:~$ sudo dmesg
...
[4251487.063009] sr 0:0:0:0: [sr0] scsi3-mmc drive: 24x/24x writer dvd-ram cd/rw xa/form2 cdda tray
[4251487.093385] debugfs: Directory 'sr0' with parent 'block' already present!
[4251487.093465] sr 0:0:0:0: Attached scsi CD-ROM sr0
brick@dowland:~$ lsscsi --long
[0:0:0:0] cd/dvd hp BDDVDRW CA21N C2S2 /dev/sr0
state=running queue_depth=1 scsi_level=6 type=5 device_blocked=0 timeout=30
brick@dowland:~$ cat /sys/bus/scsi/devices/0\:0\:0\:0/state
running
brick@dowland:~$ cat /sys/bus/scsi/devices/0\:0\:0\:0/uevent
DEVTYPE=scsi_device
DRIVER=sr
MODALIAS=scsi:t-0x05
brick@dowland:~$ cat /proc/sys/dev/cdrom/info
CD-ROM information, Id: cdrom.c 3.20 2003/12/17
drive name: sr0
drive speed: 24
drive # of slots: 1
Can close tray: 1
Can open tray: 1
Can lock tray: 1
Can change speed: 1
Can select disk: 0
Can read multisession: 1
Can read MCN: 1
Reports media changed: 1
Can play audio: 1
Can write CD-R: 1
Can write CD-RW: 1
Can read DVD: 1
Can write DVD-R: 1
Can write DVD-RAM: 1
Can read MRW: 1
Can write MRW: 1
Can write RAM: 1
Thank you for reading this far! What else should I look at?
