tree af66ec974e6752be7f337f03097f7877318c76df
parent 74c14ae82c4f6d0983920ad2f258999a6c8f6f0c
author Masayuki Igawa <masayuki@igawa.me> 1490584953 +0900
committer Masayuki Igawa <masayuki@igawa.me> 1490584953 +0900
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Raise exception when get_disks() cannot get 'TYPE' column

This commit makes get_disks() raise an exception when it cannot get
'TYPE' column. In most of new linux distros, this cannot be happened,
however, in old distros, the 'TYPE' column doesn't exist. In that
situation, this could be useful for debugging and it's easy to
understand what is the root cause.

Change-Id: I328f1c2ea80478a00432f51e77ffd12036829430
Related-Bug: #1673607