Comment 16 for bug 466575

I have the same problem with an MP3 player, which has a "RockChip USBDISK User: 8,2 GB File system" and adds also a "RockChip USBDISK SD" to the "Computer" screen of Nautilus (memory can be expanded with a microSD, and this "card reader" is detected, I suppose).

If I "Safely Remove" it, it's unmounted (at least, Nautilis gives me the "Mount" option) but the device doesn't confirm the correct removal, and after some time thhis error is displayed:

«Error detaching: helper exited with exit code 1: synchronize cache(10): transport: Host_status=0x05 [DID_ABORT]
Driver_status=0x00 [DRIVER_OK, SUGGEST_OK]

Error SYNCHRONIZE CACHE for /dev/sdb: Success
start stop unit: pass through os error: No such device
Error STOP UNIT for /dev/sdb: No such device»

I press "OK" and the device confirms the correct removal.
"Eject", "Unmount" or "sudo eject" give no error, but have no effect, except that as above the device is unmounted (at least, Nautilis gives me the "Mount" option).

If I "Safely Remove" "RockChip USBDISK SD" and then "RockChip USBDISK User: 8,2 GB File system", I receive two errors:

«"Impossibile fermare l'unità" [Italian for "It's impossible to stop the drive"]
Device is not a drive»

«"Impossibile fermare l'unità"
DBus error org.freedesktop.DBus.Error.NoReply: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.»

And then the device confirms the correct removal.

Ubuntu 9.04
kernel 2.61.31-14.48 generic
nautilus 1:2.28.1-0ubuntu3
devicekit-disks 007-2ubuntu4