physical CD-ROM / DVD tactics (auto mount)

[nadiva 4]

goal: have CD-ROM / DVD reader working, ready to server files asap without going to terminal, auto mount

hardware: for example Microserver Gen10 with internal USB port and cute thin CD slot, it'd be a shame to leave it empty

software: find cdrom.ko and sr_mod.ko from someone nice who can build

 

initial setup

 

Quote

insmod /lib/modules/cdrom.ko # lock and load the driver
insmod /lib/modules/sr_mod.ko # --""--
lsmod | grep cdrom # result: cdrom xxxx 1 sr_mod
mknod /dev/sr0 b 11 0 # create scsi device

mknod /dev/cdrom b 11 0 # let's set up this "default" as a working duplicate, to satisfy eject command i.e. not type parameters each time
mkdir /volume1/yourshare/DVD # a subfolder in a share for easy access

 

here the work can end, if you like to operate it via CLI.

Automount is crippled like on other appliances, we can hook up to udev, e.g. monitor actions here:

 

Quote

udevadm --debug monitor

 

normally udev would do the job, but here events are limited if not delayed, there's just change action, that's what i put a respective command to /etc/udev/rules.d/99-local.rules:

 

Quote

KERNEL=="sr0", SUBSYSTEMS=="usb", ACTION=="change", RUN+="/bin/sh -c /root/cdrom.sh"

 

load the rules:

Quote

udevadm control --reload-rules

 

then process its events to make sure actions are captured, provide automount (sometimes delayed) and optionally make sound when CD is inserted or ejected via AudioStation (just grab mp3 fast on https://ttsmp3.com/), cdrom.sh:

 

Quote

if [[ $(df -t iso9660) ]]; then
    if [[ $(blkid /dev/sr0) ]]; then            #active and mounted -> eject
        eject /dev/cdrom
    else                                        #inactive but mounted -> unmount
        umount /dev/cdrom
    fi
    ###OPTIONAL SOUND nohup /volume1/@appstore/AudioStation/bin/mplayer /root/cdejected.mp3 2> /dev/null &
else
    if [[ $(blkid /dev/sr0) ]]; then            #active and unmounted -> mount
        mount /dev/cdrom && eject /dev/cdrom -i off ###OPTIONAL SOUND  && nohup /volume1/@appstore/AudioStation/bin/mplayer /root/cdinserted.mp3 2> /dev/null &
    else                                        #inactive and unmounted -> nothing
        sleep 0; #no action, chance of double event ("change") is here
    fi
fi

 

however it's even more crippled, the triggers are fired often too late (or only when un/mounting on CLI) and never when doing manual button oepration, so we best periodically launch blkid or eject -a on /dev/cdrom via scheduler. I choose to fire the latter to save some cpu cycles as it's faster and i launch it each 30 seconds. In the end, this way we avoid CLI completely, it gets un/mounted automatically with little delay (~15sec, loading CD alone is 10sec so i think it doesn't matter).

 

> Some devices prevent manual buttons once mounted but users love them instead of CLI -> this is fixed during mount.

> CD will be inserted with physical tray push

> CD will be ejected with physical eject button OR if you love CLI: umount /dev/cdrom OR eject (no parameters)

 

[IG-88 664]

nice, thats step one

any one adding automatic audio cd, video dvd and bluray ripping?

 

we could add the cd/dvd drivers permanently to the extended extra.lzma, loading them would not hurt any other functionality i guess

[nadiva 4]

yeah   so you install transcode in ikpgui an set it up in the script above:

 

Quote

 

transcode -i /dev/cdrom/ -y ffmpeg -o /volume1/fastrips/$(blkid -o value -s LABEL /dev/cdrom).ext

file -s /dev/cdrom >> /volume1/fastrips/ripped.log

eject

 

 

then insert another one...wait... another one...wait... just an example