Sync Failed with File Copy Error

[jagaller2000]

Hello out there!

I'm still trying to get my Classic 6th Gen. to sync with PodKit via a Raspberry Pi 3b. I tried using the daemon mode and it kept failing without results, so I attempted a manual run (via docker). First cleaned up orphans, then went for a verbose sync. Can you help me pinpoint the cause?

My Config:

version = 1

[defaults]
music = "juno"

[music.juno]
type = "subsonic"
url = "http://IP:PORT"
username = "user"
password = "blablabla"
path = "/tmp/subsonic-cache/juno"

[devices.junos-classic]
volumeUuid = "XXXX-TTTT"
volumeName = "Q'S IPOD"
quality = "max"
audio = "juno"
music = "juno"
artwork = true

61aad67b7b8a:/# podkit doctor --repair orphan-files -d /ipod
Repairing orphan-files for 0 tracks...

Deleted 60 orphan files, freed 1.6 GB                                                               

Repair complete. Run `podkit doctor` to verify.
61aad67b7b8a:/# podkit doctor --verbose -d /ipod
podkit doctor — checking iPod at /ipod

  ✓ Artwork Integrity    ArtworkDB is empty (no artwork entries)
  ✓ Orphan Files    All 0 files on disk are referenced by tracks

All checks passed.
61aad67b7b8a:/# podkit sync -d /ipod -vvv
iPod database opened
Found 533 tracks in source
Diff computed

=== Syncing Music ===

Tracks to process: 533
Estimated size: 28.6 GB
Estimated time: ~3h 15m

Saving iPod database...Music sync complete!

Failed: 533 tracks
...
  - Architects - Whiplash
    Category: database
    Error: Failed to copy file: No 'F..' directories found in '/ipod/iPod_Control/Music'.
    Stack trace:
      at copyFileToTrack (/$bunfs/root/podkit:29643:28)
      at transferToIpod (/$bunfs/root/podkit:11835:19)
      at transferWithRetry (/$bunfs/root/podkit:11601:49)
      at executePipeline (/$bunfs/root/podkit:11463:52)
      at processTicksAndRejections (native:7:39)
...


=== Summary ===

Synced 0 items (533 failed)
Duration: 8h 46m

Another attempt with a smaller library and default quality settings reports errors, while the files actually appear on the device (without artwork).

61aad67b7b8a:/# podkit doctor -d junos-classic
Looking for iPod 'junos-classic'...
podkit doctor — checking iPod at /tmp/podkit-Q'S IPOD

  - Artwork Integrity    No ArtworkDB found (iPod has no artwork)
  ✓ Orphan Files    All 0 files on disk are referenced by tracks

All checks passed.
61aad67b7b8a:/# podkit sync -d junos-classic
Looking for iPod 'junos-classic'...
iPod database opened
Found 47 tracks in source
Diff computed

=== Syncing Music ===

Tracks to process: 47
Estimated size: 444.6 MB
Estimated time: ~2m 58s

Overall:  [>                             ]   0%  0/47 tracks
Saving iPod database...
** (process:1734): CRITICAL **: 10:47:17.308: itdb_splr_validate: assertion 'at != ITDB_SPLAT_UNKNOWN' failed
Music sync complete!

Failed: 47 tracks

=== Summary ===

Synced 0 items (47 failed)
Duration: 1h 10m

Any ideas what I should try?

All the best,
Jan