lkml.org 
[lkml]   [2006]   [Nov]   [5]   [last100]   RSS Feed
Views: [more markup]   [less markup]   [headers]   [forward]  
 
Messages in this thread
/
DateSun, 05 Nov 2006 21:42:15 -0500
FromPhillip Susi <>
SubjectRe: New filesystem for Linux
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 ).


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-11-06 01:47    [W:0.430 / U:0.410 seconds]
©2003-2008 Jasper Spaans