Messages in this thread | | | Date | Sun, 05 Nov 2006 21:42:15 -0500 | From | Phillip Susi <> | Subject | Re: New filesystem for Linux |
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Mikulas Patocka wrote: > There was discussion about it here some times ago, and I think the > result was that the IDE bus is reset prior to capacitors discharge and > total loss of power and disk has enough time to finish a sector --- but > if you have crap power supply (doesn't signal power loss), crap > motherboard (doesn't reset bus) or crap disk (doesn't respond to reset), > it can fail. > > BTW. reiserfs and xfs depend on this feature too. ext3 is the only one > that doesn't. > > Mikulas
Yes, if your disk can not atomically commit a single sector, then it is broken. And ALL filesystems rely on this behavior because they all expect NOT to have hardware IO read failures of important metadata after a power failure ( due to the sector ECC failing ).
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