Only with a UPS
Posted Sep 10, 2009 2:02 UTC (Thu) by ncm
In reply to: POSIX v. reality: A position on O_PONIES
Parent article: POSIX v. reality: A position on O_PONIES
We can only complain of what was omitted, not what was said. What was omitted, as is unfortunately always omitted from presentations by file system experts howsoever brilliant, is mention of the crucial distinction between crashes and power drops. Disks being the way they are, none of the above really applies to power drops. If power to the drive drops, your file system can offer you no guarantee, O_PONIES support notwithstanding.
Anywhere that a power drop is overwhelmingly more likely than a system crash, which includes Most of the Known World, the whole discussion is more or less moot. That does not make the discussion moot overall, though, because people who care about their data can move themselves into the Rest of Known World by providing a few seconds' UPS backing for the drive. We just need to make clear which part of the world we're talking about.
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