After formatting under 12.04, I didn't try to use the disk under 14.04 in a 
plain ext* format...
While running 12.04 I ran 'cryptsetup luksFormat',  which ran successfully, I 
wrote a couple of files and read them.  Then back in 14.04, similar to before,  
couldn't read the disk.  I could mount it, but dmesg had the same msg as before 
which looked like a hardware issue:
[  891.562667] end_request: critical target error, dev sdb, sector 0
[  891.564060] end_request: critical target error, dev sdb, sector 97525840
[  891.564075] Aborting journal on device dm-2-8.
[  898.397620] EXT4-fs error (device dm-2): ext4_journal_check_start:56: 
Detected aborted journal
[  898.397628] EXT4-fs (dm-2): Remounting filesystem read-only

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https://bugs.launchpad.net/bugs/1368299

Title:
  External USB hard drive format fails

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