On Mon, Jul 23, 2012 at 06:19:10PM +0200, Yves-Alexis Perez wrote: > > I'll try rebuilding a non preempt kernel just in case. > > Maybe try with Debian kernel first? It's just an apt-get install away > and will give you a setup identical as mine. I have a custom initramfs, it was easier to compile a new kernel than to try and get the debian one to boot my system :) But for reference, what kernel package are you using? On Mon, Jul 23, 2012 at 07:27:47PM +0200, André Gall wrote: > I remember a test which I conducted after I received my Intel SDD 510 > 120 GB about 1 year ago. I don't remember all the details, but the > essence was that write speed decreased dramatically if the write process > wasn't aligned. > I did: > dd if=/dev/zero of=/dev/sda bs=4k > I got around 400 Mb/sec, which was expected. But when I did: > > dd if=/dev/zero of=/dev/sda bs=5k > I got only around 40 Mb/sec Yes, write alignment and write amplification are definitely issues on SSDs, but note how I was only doing read tests :) See http://www.void.gr/kargig/blog/2012/01/11/linux-ssd-partition-alignment-tips/ Cheers, Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/ _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
