FAILED mounting ISO image

[KeithAbbott]

Some, but not all of my iso ripped DVDs are not being picked up when I Scan Imported Media. Looking at the log file, I am getting the message "FAILED mounting ISO image". Here is a snippet from the log:

Sun 9/10 17:09:21.443 [LibraryImporter@5246ca7d] testFile=Disc 01.iso
Sun 9/10 17:09:21.443 [LibraryImporter@5246ca7d] Executing process: [sudo, -n, mount, /var/media/videos/Call the Midwife/Season 6 (2017)/Disc 01.iso, /tmp/formatmount, -o, loop,ro]
Sun 9/10 17:09:21.446 [LibraryImporter@5246ca7d] Started process object: java.lang.UNIXProcess@75cd214d
Sun 9/10 17:09:21.462 [ErrorStreamConsumer@3c37f902] STDERR:java.lang.UNIXProcess@75cd214d: mount: wrong fs type, bad option, bad superblock on /dev/loop2,
Sun 9/10 17:09:21.463 [ErrorStreamConsumer@3c37f902] STDERR:java.lang.UNIXProcess@75cd214d: missing codepage or helper program, or other error
Sun 9/10 17:09:21.463 [ErrorStreamConsumer@3c37f902] STDERR:java.lang.UNIXProcess@75cd214d:
Sun 9/10 17:09:21.463 [ErrorStreamConsumer@3c37f902] STDERR:java.lang.UNIXProcess@75cd214d: In some cases useful info is found in syslog - try
Sun 9/10 17:09:21.463 [ErrorStreamConsumer@3c37f902] STDERR:java.lang.UNIXProcess@75cd214d: dmesg | tail or so.
Sun 9/10 17:09:21.471 [LibraryImporter@5246ca7d] FAILED mounting ISO image /var/media/videos/Call the Midwife/Season 6 (2017)/Disc 01.iso to /tmp/formatmount
Sun 9/10 17:09:21.471 [LibraryImporter@5246ca7d] Executing process: [sudo, -n, mount, /var/media/videos/Call the Midwife/Season 6 (2017)/Disc 01.iso, /tmp/formatmount, -o, loop,ro]
Sun 9/10 17:09:21.472 [LibraryImporter@5246ca7d] Started process object: java.lang.UNIXProcess@1819efb4
Sun 9/10 17:09:21.486 [ErrorStreamConsumer@bbb2f5c] STDERR:java.lang.UNIXProcess@1819efb4: mount: wrong fs type, bad option, bad superblock on /dev/loop2,
Sun 9/10 17:09:21.487 [ErrorStreamConsumer@bbb2f5c] STDERR:java.lang.UNIXProcess@1819efb4: missing codepage or helper program, or other error
Sun 9/10 17:09:21.487 [ErrorStreamConsumer@bbb2f5c] STDERR:java.lang.UNIXProcess@1819efb4:
Sun 9/10 17:09:21.487 [ErrorStreamConsumer@bbb2f5c] STDERR:java.lang.UNIXProcess@1819efb4: In some cases useful info is found in syslog - try
Sun 9/10 17:09:21.487 [ErrorStreamConsumer@bbb2f5c] STDERR:java.lang.UNIXProcess@1819efb4: dmesg | tail or so.
Sun 9/10 17:09:21.495 [LibraryImporter@5246ca7d] FAILED mounting ISO image /var/media/videos/Call the Midwife/Season 6 (2017)/Disc 01.iso to /tmp/formatmount
Sun 9/10 17:09:21.496 [LibraryImporter@5246ca7d] Executing process: [sudo, -n, mount, /var/media/videos/Call the Midwife/Season 6 (2017)/Disc 01.iso, /tmp/formatmount, -o, loop,ro]
Sun 9/10 17:09:21.497 [LibraryImporter@5246ca7d] Started process object: java.lang.UNIXProcess@6abff21e
Sun 9/10 17:09:21.510 [ErrorStreamConsumer@78c0b0d1] STDERR:java.lang.UNIXProcess@6abff21e: mount: wrong fs type, bad option, bad superblock on /dev/loop2,
Sun 9/10 17:09:21.511 [ErrorStreamConsumer@78c0b0d1] STDERR:java.lang.UNIXProcess@6abff21e: missing codepage or helper program, or other error
Sun 9/10 17:09:21.511 [ErrorStreamConsumer@78c0b0d1] STDERR:java.lang.UNIXProcess@6abff21e:
Sun 9/10 17:09:21.511 [ErrorStreamConsumer@78c0b0d1] STDERR:java.lang.UNIXProcess@6abff21e: In some cases useful info is found in syslog - try
Sun 9/10 17:09:21.511 [ErrorStreamConsumer@78c0b0d1] STDERR:java.lang.UNIXProcess@6abff21e: dmesg | tail or so.
Sun 9/10 17:09:21.520 [LibraryImporter@5246ca7d] FAILED mounting ISO image /var/media/videos/Call the Midwife/Season 6 (2017)/Disc 01.iso to /tmp/formatmount
Sun 9/10 17:09:21.521 [LibraryImporter@5246ca7d] Added:MediaFile[id=16416282 A[16416285,16416283,"Disc 01",0@0910.09:51,0,] mask= host=SageTV encodedBy= format=null /var/media/videos/Call the Midwife/Season 6 (2017)/Disc 01.iso, Seg0[Sun 9/10 9:51:32.999-Sun 9/10 9:51:33.000]] num=2911
Sun 9/10 17:09:21.521 [LibraryImporter@5246ca7d] New Library File MediaFile[id=16416282 A[16416285,16416283,"Disc 01",0@0910.09:51,0,] mask= host=SageTV encodedBy= format=null /var/media/videos/Call the Midwife/Season 6 (2017)/Disc 01.iso, Seg0[Sun 9/10 9:51:32.999-Sun 9/10 9:51:33.000]]

The iso file mounts properly in Windows 10, and I can see the VIDEO_TS subdirectory with all of the vob files, etc. Any suggestions?

[stuckless]

The wrong fs type is key here. Basically the mount command is using a default files system for isos (maybe iso9660 or something like that). In googling, it seems that some dvds might require udf. I think that the mounting logic might need to try the default, as it does not, and if that fails, then try -t udf OR -t auto. I'd open a bug, bug, when someone works on this, they might need to get a dvd.iso in order to test it out (or have you accept Sage.jar updates to test).

[KeithAbbott]

Thanks for the info, Sean. I did compare the file systems with PowerISO for iso's that imported successfully and iso's that did not import successfully, there is no difference according to PowerISO.

Running a few tests gives me additional interesting results. If I rename a file that did not import successfully, then run "Scan Imported Media" in Sage, rename the file back, and run "Scan Imported Media" in Sage again, the file imports properly. Which tells me that the problem may not lie in the iso file at all.

When I look at the Sage log, it appears that the way that Sage determines whether a given iso imported properly is by mounting it multiple times. If it fails due to an "already mounted" message, Sage adds the media file to it's database. Kinda backward logic, if I am correct in how it is working. And if I am correct, I'm wondering if the logic is getting tripped up occasionally and not importing some files properly.

[KeithAbbott]

Just thought I would document my workaround here, in case anyone else runs into a similar problem. It appears to me that this is primarily a problem when many new ISOs are being imported, some of the imports are failing and I have not been able to isolate the reason why.

What I did to get past it is I generated an XML file of all imported DVD files from the web interface, and compared that list to the ISO files contained in the videos directory. The compare allowed me to determine which ISO files had not been imported properly. I then renamed each of those files, ran the "Scan Imported Media" function, renamed the files back to the original name, and ran the "Scan Imported Media" function again.

Sage then showed the missing DVDs in the Videos section, alongside all of the rest of my DVDs.

[jgs14]

That error can be caused if your loop device isn't setup properly.

Try:

1. modprobe loop (as root)
2. Check to see that the loop module loaded (lsmod | grep loop)
2. make sure /dev/loop0 through /dev/loop9 actually exist

If the /dev/loop* devices don't exist, create them with mknod: (as root)

# mknod /dev/loop0 b 7 0
# mknod /dev/loop1 b 7 1
...
# mknod /dev/loop9 b 7 9

Regards,

Joe

[KeithAbbott]

Interesting, my /dev/loop8 and /dev/loop9 were both missing. I used the mknod command and created both nodes, I'll have to check and see if the Imported Media scan included all .iso files this time.

I'm using unRAID, I wonder why all ten nodes aren't pre-defined in unRAID?

[KeithAbbott]

Looks like the mknod commands to create /dev/loop8 and /dev/loop9 did not persist after a reboot. Anyone know what steps I should follow to get /dev/loop8 and /dev/loop9 to persist after a reboot?

[stuckless]

Originally Posted by KeithAbbott

Looks like the mknod commands to create /dev/loop8 and /dev/loop9 did not persist after a reboot. Anyone know what steps I should follow to get /dev/loop8 and /dev/loop9 to persist after a reboot?

Sounds like something that could easily be added to the sagetv unRAID startup scripts.