Hi,
from your Dmesg.txt:
[ 481.402215] sd 3:0:0:0: [sda] Unhandled sense code
[ 481.402219] sd 3:0:0:0: [sda] Result: hostbyte=DID_OK
driverbyte=DRIVER_SENSE
[ 481.402226] sd 3:0:0:0: [sda] Sense Key : Medium Error [current]
[descriptor]
[ 481.402234] Descriptor sense data with sense
** Tags removed: need-duplicate-check
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https://bugs.launchpad.net/bugs/1283340
Title:
package linux-image-3.2.0-60-generic 3.2.0-60.91 failed to
install/upgrade: subprocess installed