On Wed, Oct 30, 2013 at 10:22:45PM +0000, Edward Ned Harvey (lopser) wrote: > > From: Brandon Allbery [mailto:allber...@gmail.com] > > > > And it prevents the head scribbling garbage during a power failure how?
> I acknowledge that during a power cut, the drive may fail to > complete write instructions, resulting in corrupt data in the blocks > that the drive had been instructed to overwrite. But it's not going > to magically invent new write instructions, jump tracks, or write > corrupt data to unexpected blocks. Sadly, I have direct experience of exactly this, a drive wrote data while retracting the heads, a spiral of nonsense resulted. Also reference Chris Seibenmann's blog for some ways in which ZFS can become corrupt, also interesting his findings on SSD's transparently de-duping redundant superblocks for you. Also check USENIX ;login: for 'silent data corruption'. That you haven't encountered a problem is not the same as the problem can't happen. _______________________________________________ Tech mailing list Tech@lists.lopsa.org https://lists.lopsa.org/cgi-bin/mailman/listinfo/tech This list provided by the League of Professional System Administrators http://lopsa.org/
