Running 12.04 LTS on 64-bit AMD setup with a generic USB attached Multi-
card reader.  With all the slots in the reader empty (CF/SD/USB etc) the
following appears in kern.log and syslog, repeating the whole block
approximately every 55 seconds.

Oct 26 12:59:38 chi kernel: [238967.019095] sd 8:0:0:0: [sdd] Test WP failed, 
assume Write Enabled
Oct 26 12:59:38 chi kernel: [238967.021168] sd 8:0:0:0: [sdd] Asking for cache 
data failed
Oct 26 12:59:38 chi kernel: [238967.021174] sd 8:0:0:0: [sdd] Assuming drive 
cache: write through

Inserting a card or stick into any of the device slots generates 6
additional lines in the logs then stops the cycle. In other words this
is only a problem when the device is 'empty'

FYI - the reader does NOT appear to have any specific card sensing
mechanism, either switch or sensor, built in.

Rather than blacklisting the module, which I may want to use one day, I
stuck an old SD card in the reader and the logs are quiet...

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https://bugs.launchpad.net/bugs/925760

Title:
  Constant warnings from the kernel: Test WP failed, assume Write
  Enabled

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