有人能帮我吗？我现在已经尝试了几个小时来读取受保护的 DVD。将 USB 驱动器连接到 Windows PC 可以正常工作 - 可以读取所有 DVD，在相关主机上的 Xubuntu 虚拟机中也可以读取所有 DVD。但是当将 OpenMediaVault 安装为主机系统时，我只能读取未受保护的 DVD。因为它 100% 在客户机内工作，所以它与硬件无关。
# uname -a
Linux nas 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u2 (2016-10-19) x86_64 GNU/Linux
# dpkg -l libdvdread4 libdvdcss2 libdvdnav4
Gewünscht=Unbekannt/Installieren/R=Entfernen/P=Vollständig Löschen/Halten
| Status=Nicht/Installiert/Config/U=Entpackt/halb konFiguriert/
Halb installiert/Trigger erWartet/Trigger anhängig
|/ Fehler?=(kein)/R=Neuinstallation notwendig (Status, Fehler: GROSS=schlecht)
||/ Name Version Architektur Beschreibung
+++-===========================================-==========================-==========================-====================================
ii libdvdcss2:amd64 1.4.0-1~local amd64 library for accessing encrypted DVDs
ii libdvdnav4:amd64 5.0.1-1 amd64 DVD navigation library
ii libdvdread4:amd64 5.0.0-1 amd64 library for reading DVDs
# dmesg
[ 3184.701656] usb 3-1.1: USB disconnect, device number 6
[ 3196.173818] usb 3-1.1: new high-speed USB device number 7 using ehci-pci
[ 3196.272569] usb 3-1.1: New USB device found, idVendor=067b, idProduct=2571
[ 3196.272579] usb 3-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 3196.272586] usb 3-1.1: Product: SLIM Portable Blu-ray Drive
[ 3196.272591] usb 3-1.1: Manufacturer: HLDS Inc.
[ 3196.272597] usb 3-1.1: SerialNumber: PROLIFICMP000000376
[ 3196.273202] usb-storage 3-1.1:1.0: USB Mass Storage device detected
[ 3196.273564] scsi8 : usb-storage 3-1.1:1.0
[ 3197.397138] scsi 8:0:0:0: CD-ROM HL-DT-ST BD-RE BP55EB40 1.00 PQ: 0 ANSI: 0
[ 3197.486298] sr0: scsi3-mmc drive: 0x/24x writer dvd-ram cd/rw xa/form2 cdda tray
[ 3197.486731] sr 8:0:0:0: Attached scsi CD-ROM sr0
[ 3197.487181] sr 8:0:0:0: Attached scsi generic sg5 type 5
[ 3216.362379] sr 8:0:0:0: [sr0]
[ 3216.362388] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3216.362392] sr 8:0:0:0: [sr0]
[ 3216.362396] Sense Key : Illegal Request [current]
[ 3216.362402] sr 8:0:0:0: [sr0]
[ 3216.362408] Add. Sense: Read of scrambled sector without authentication
[ 3216.362413] sr 8:0:0:0: [sr0] CDB:
[ 3216.362416] Read(10): 28 00 00 00 04 00 00 00 02 00
[ 3216.362429] end_request: I/O error, dev sr0, sector 4096
[ 3216.362514] Buffer I/O error on device sr0, logical block 512
[ 3216.427062] sr 8:0:0:0: [sr0]
[ 3216.427069] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 3216.427074] sr 8:0:0:0: [sr0]
[ 3216.427077] Sense Key : Illegal Request [current]
[ 3216.427083] sr 8:0:0:0: [sr0]
[ 3216.427089] Add. Sense: Read of scrambled sector without authentication
[ 3216.427094] sr 8:0:0:0: [sr0] CDB:
[ 3216.427096] Read(10): 28 00 00 00 04 00 00 00 02 00
[ 3216.427110] end_request: I/O error, dev sr0, sector 4096
[ 3216.427195] Buffer I/O error on device sr0, logical block 512
# udevadm info /dev/sr0
P: /devices/pci0000:00/0000:00:16.0/usb3/3-1/3-1.1/3-1.1:1.0/host8/target8:0:0/8:0:0:0/block/sr0
N: sr0
L: -100
S: cdrom
S: cdrw
S: disk/by-id/usb-HL-DT-ST_BD-RE_BP55EB40_PROLIFICMP000000376-0:0
S: disk/by-path/pci-0000:00:16.0-usb-0:1.1:1.0-scsi-0:0:0:0
S: dvd
S: dvdrw
E: DEVLINKS=/dev/disk/by-id/usb-HL-DT-ST_BD-RE_BP55EB40_PROLIFICMP000000376-0:0 /dev/dvd /dev/cdrom /dev/cdrw /dev/disk/by-path/pci-0000:00:16.0-usb-0:1.1:1.0-scsi-0:0:0:0 /dev/dvdrw
E: DEVNAME=/dev/sr0
E: DEVPATH=/devices/pci0000:00/0000:00:16.0/usb3/3-1/3-1.1/3-1.1:1.0/host8/target8:0:0/8:0:0:0/block/sr0
E: DEVTYPE=disk
E: ID_BUS=usb
E: ID_CDROM=1
E: ID_CDROM_BD=1
E: ID_CDROM_BD_R=1
E: ID_CDROM_BD_RE=1
E: ID_CDROM_CD=1
E: ID_CDROM_CD_R=1
E: ID_CDROM_CD_RW=1
E: ID_CDROM_DVD=1
E: ID_CDROM_DVD_PLUS_R=1
E: ID_CDROM_DVD_PLUS_RW=1
E: ID_CDROM_DVD_PLUS_R_DL=1
E: ID_CDROM_DVD_R=1
E: ID_CDROM_DVD_RAM=1
E: ID_CDROM_DVD_RW=1
E: ID_CDROM_MEDIA=1
E: ID_CDROM_MEDIA_DVD=1
E: ID_CDROM_MEDIA_SESSION_COUNT=1
E: ID_CDROM_MEDIA_STATE=complete
E: ID_CDROM_MEDIA_TRACK_COUNT=1
E: ID_CDROM_MEDIA_TRACK_COUNT_DATA=1
E: ID_CDROM_MRW=1
E: ID_CDROM_MRW_W=1
E: ID_FOR_SEAT=block-pci-0000_00_16_0-usb-0_1_1_1_0-scsi-0_0_0_0
E: ID_INSTANCE=0:0
E: ID_MODEL=BD-RE_BP55EB40
E: ID_MODEL_ENC=BD-RE\x20BP55EB40\x20\x20
E: ID_MODEL_ID=2571
E: ID_PATH=pci-0000:00:16.0-usb-0:1.1:1.0-scsi-0:0:0:0
E: ID_PATH_TAG=pci-0000_00_16_0-usb-0_1_1_1_0-scsi-0_0_0_0
E: ID_REVISION=1.00
E: ID_SERIAL=HL-DT-ST_BD-RE_BP55EB40_PROLIFICMP000000376-0:0
E: ID_SERIAL_SHORT=PROLIFICMP000000376
E: ID_TYPE=cd
E: ID_USB_DRIVER=usb-storage
E: ID_USB_INTERFACES=:080650:
E: ID_USB_INTERFACE_NUM=00
E: ID_VENDOR=HL-DT-ST
E: ID_VENDOR_ENC=HL-DT-ST
E: ID_VENDOR_ID=067b
E: MAJOR=11
E: MINOR=0
E: SUBSYSTEM=block
E: TAGS=:systemd:uaccess:seat:
E: USEC_INITIALIZED=3195163408
正如您所看到的，对于这些受读保护的视频 DVD，没有ID_FS_TYPE返回ID_FS_LABEL。这一切的原因是什么？
似乎scrambled sector只要您没有使用电影播放器访问 DVD，这些错误就会出现在不同的发行版中libdvdcss。我已经多次设置了 Debian 和 Ubuntu，我最近的测试表明，一个Ubuntu 16.04 Server可以显示ID_FS_LABEL/TYPE受版权保护的 DVD 中的信息，但Debian 8.6不能。
这两个 Linux 发行版之间有什么区别，一个能运行，一个不能？