[rwhe]

OK, here is the debug log.

I started calibre in debug mode with the Thunderbolt connected in Charge Only mode. Then I set the USB connection to Disk Drive mode on the Thunderbolt and sent an ebook to the main memory on the device. Then I put the Thunderbolt into Charge Only mode again and quit calibre.

calibre Debug log
calibre 0.7.52
Linux-2.6.35-28-generic-i686-with-debian-squeeze-sid
Linux
('Linux', '2.6.35-28-generic', '#49-Ubuntu SMP Tue Mar 1 14:40:58 UTC 2011')
Python 2.7.1
Linux: ('debian', 'squeeze/sid', '')
Starting up...
mount: block device /dev/sr0 is write-protected, mounting read-only
mount: wrong fs type, bad option, bad superblock on /dev/sr0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so

Started up in 21.0666029453
mount: block device /dev/sr0 is write-protected, mounting read-only
mount: wrong fs type, bad option, bad superblock on /dev/sr0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so

Unable to open device <calibre.devices.android.driver.ANDROID object at 0xab021cc>
Traceback (most recent call last):
File "site-packages/calibre/gui2/device.py", line 164, in do_connect
File "site-packages/calibre/devices/usbms/device.py", line 711, in open
File "site-packages/calibre/devices/usbms/device.py", line 642, in open_linux
DeviceError: Unable to mount main memory (Error code: 32)

Connect to device failed, retrying in 5 seconds...
mount: block device /dev/sr0 is write-protected, mounting read-only
mount: wrong fs type, bad option, bad superblock on /dev/sr0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so

mount: block device /dev/sr0 is write-protected, mounting read-only
mount: wrong fs type, bad option, bad superblock on /dev/sr0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so

Unable to open device <calibre.devices.android.driver.ANDROID object at 0xab021cc>
Traceback (most recent call last):
File "site-packages/calibre/gui2/device.py", line 164, in do_connect
File "site-packages/calibre/devices/usbms/device.py", line 711, in open
File "site-packages/calibre/devices/usbms/device.py", line 642, in open_linux
DeviceError: Unable to mount main memory (Error code: 32)

Device connect failed again, giving up
mount: block device /dev/sr0 is write-protected, mounting read-only
mount: wrong fs type, bad option, bad superblock on /dev/sr0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so

Unable to mount card (Error code: 32)
Job: 1 Get device information finished
No details available.
DEBUG: 0.0 USBMS: Fetching list of books from device. Device= ANDROID oncard= None
DEBUG: 0.0 USBMS: dirs are: /media/6333-3464/ ['eBooks', 'wordplayer/calibretransfer', 'Books']
DEBUG: 0.3 USBMS: count found in cache: 0, count of files in metadata: 0, need_sync: False
DEBUG: 0.3 USBMS: Finished fetching list of books from device. oncard= None
DEBUG: 0.3 USBMS: Fetching list of books from device. Device= ANDROID oncard= carda
DEBUG: 0.3 USBMS: Fetching list of books from device. Device= ANDROID oncard= cardb
Job: 2 Get list of books on device finished
No details available.
Device using plugboard epub ANDROID None
Setting metadata in: The Alhambra at: /tmp/calibre_0.7.52_tmp_pSvyaA/calibre_0.7.52_HX4mow.epub
DEBUG: 49.1 USBMS: uploading 1 books
DEBUG: 49.1 USBMS: finished uploading 1 books
Job: 3 Upload 1 books to device:The Alhambra finished
No details available.
DEBUG: 49.9 USBMS: adding metadata for 1 books
DEBUG: 49.9 USBMS: finished adding metadata
DEBUG: 51.2 USBMS: starting sync_booklists
DEBUG: 51.2 USBMS: finished sync_booklists
Job: 3 Upload 1 books to device:The Alhambra finished
No details available.
Job: 4 Send metadata to device finished
No details available.