Recurring freeze and crash, has to do with internal cover calls, I think

[Mike Propp]

I've can successfully reproduce the following error:

----
calibre, version 2.38.0
ERROR: Unhandled exception: <b>IOError</b>:[Errno 5] Input/output error

calibre 2.38 isfrozen: True is64bit: True
Darwin-14.5.0-x86_64-i386-64bit Darwin ('64bit', '')
('Darwin', '14.5.0', 'Darwin Kernel Version 14.5.0: Wed Jul 29 02:26:53 PDT 2015; root:xnu-2782.40.9~1/RELEASE_X86_64')
Python 2.7.9
OSX: ('10.10.5', ('', '', ''), 'x86_64')
Traceback (most recent call last):
  File "site-packages/calibre/gui2/cover_flow.py", line 122, in image
  File "site-packages/calibre/gui2/library/models.py", line 698, in cover
  File "site-packages/calibre/db/legacy.py", line 335, in cover
  File "site-packages/calibre/db/cache.py", line 651, in cover
  File "site-packages/calibre/db/cache.py", line 57, in call_func_with_lock
  File "site-packages/calibre/db/cache.py", line 692, in copy_cover_to
  File "site-packages/calibre/db/backend.py", line 1319, in copy_cover_to
  File "lib/python2.7/shutil.py", line 49, in copyfileobj
IOError: [Errno 5] Input/output error
----

Running Calibre on OSX Yosemite. I started in cover flow view with the details pain opened on the right side of the Calibre window. Scrolling through the library this error happens consistently if I scroll too deep into books whose titles start with "F" (skipping to the bottom of the library with the slider avoids the error). I closed cover view and the error persisted. I closed the detail pain (no book covers visible at all) and the error occurs.

The error manifests in a full-system grab; pointer and rescue keys and the whole system become completely non-responsive (power button reboot from is all that breaks this). Sometimes (inconsistently), after about ten minutes, system control comes back with Calibre throwing the above error. At that point even Calibre responds, unless I scroll to "F" titles again.

Not sure what to do. Had great luck with Calibre for about three weeks then this just started. No major hardware or software changes (iPhote updated since Calibre was installed).

Thanks friends.

[Kovid Goyal (kovid)]

That's an I?O error, it means that writing data or reading data from
your harddisk is failing. That indicates your harddisk is about to
crash. I suggest you backup your data and replace your harddisk as soon
as possible.

 status invalid