On 07.01.2011 10:11, Matthias Schniedermeyer wrote: > On 06.01.2011 19:22, Phil Karn wrote: > > > Just have the drive interpret an ordinary write of all 0's to any LBA as > > an implicit "unmap" indication for that LBA. As long as the drive > > The drive would have to look into each written sector in the off chance > that it might be 0, that's a lot of electrons you have to burn for not > much gain. And that's ignoring the performance side, doing such a check > on each incoming write would be expensive at best. Altough, after thinking about it a little more. Doing a Population count in the controller while the data comes in over the wire can't be that expensive. Bis denn -- Real Programmers consider "what you see is what you get" to be just as bad a concept in Text Editors as it is in women. No, the Real Programmer wants a "you asked for it, you got it" text editor -- complicated, cryptic, powerful, unforgiving, dangerous. _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
