On Tue, Jun 23, 2009 at 09:46:01PM +0200, Wojciech Puchar wrote: > >>and lifetime. > > > >Even a flash filesystem will have to do wear levelling. > > yes - but it don't have to copy blocks that are free. with disk > emulation - it doesn't know anything about filesystem and don't know > what blocks are free.
If it is swapping from heavily used blocks to lightly used blocks then "so what" if there is an "unnecessary" read/write? Perhaps its harder to determine if unused than to simply move the data. I seem to recall something like this in comments in the FreeBSD virtual memory manager in 6.0-RELEASE. Don't want to leave the old data laying around for security reasons so even if the blocks are unused the formerly heavily used blocks need to be scrubbed. As I originally said to Gary Kline, "Don't let someone scare you away from the 99.8% solution waiting on the 99.9% solution." -- David Kelly N4HHE, dke...@hiwaay.net ======================================================================== Whom computers would destroy, they must first drive mad. _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
