[matanic]

I'm getting an error when I try to bulk convert a lot of files at once. It doesn't matter which files, only that there are several. Sometimes it will happen with as few as 8 but other times I can convert as many as 20 with no issues. It also doesn't seem to matter what format I'm converting from or to. All the books where I receive the error can be converted in smaller batches with no problems. The error pops up when the files are queuing. I copied the error to clipboard and this is what I got:

calibre, version 0.9.30
ERROR: Unhandled exception: <b>DatabaseException</b>:disk I/O error
RemoteTraceback (most recent call last):
File "site-packages\calibre\library\sqlite.py", line 272, in run
OperationalError: disk I/O error

Traceback (most recent call last):
File "site-packages\calibre\gui2\tools.py", line 198, in do_book
File "site-packages\calibre\ebooks\conversion\config.py", line 45, in save_specifics
File "site-packages\calibre\library\database.py", line 1168, in set_conversion_options
File "site-packages\calibre\library\sqlite.py", line 315, in run
DatabaseException: disk I/O error
RemoteTraceback (most recent call last):
File "site-packages\calibre\library\sqlite.py", line 272, in run
OperationalError: disk I/O error

I'm running this on a new Windows 8 (64 bit) computer. I know I wasn't having this problem with my old computer (64 bit Vista) so I tried uninstalling and re-installing an older calibre (0.9.20) but I got the same error, so I uninstalled that and re-installed 0.9.30. Sometimes it will queue the files but then give me this error in the middle of converting.

calibre, version 0.9.30
ERROR: Unhandled exception: <b>DatabaseException</b>:disk I/O error
RemoteTraceback (most recent call last):
File "site-packages\calibre\library\sqlite.py", line 272, in run
OperationalError: disk I/O error

Traceback (most recent call last):
File "site-packages\calibre\gui2\__init__.py", line 381, in dispatch
File "site-packages\calibre\gui2\actions\convert.py", line 238, in book_converted
File "site-packages\calibre\library\database2.py", line 1540, in add_format
File "site-packages\calibre\library\sqlite.py", line 315, in run
DatabaseException: disk I/O error
RemoteTraceback (most recent call last):
File "site-packages\calibre\library\sqlite.py", line 272, in run
OperationalError: disk I/O error

Again, if I convert the files that didn't convert in a smaller batch, it works fine.

Any ideas?