On 07/14/2010 02:07 PM, Sven Eschenberg wrote: > I don't see why cryptsetup does not end up with 1024 sectors (which is > the optimal_io_size) - or is the luks header bigger than 512k? even > bigger than 1 MB (2048 sectors) ? yes. not header, but space for 8 keyslots. Alignment is multiple of caclulated size - keyslot takes a lot of space. Add --debug - you see required alignment there, then code must take into account keyslots size. So you have 2048s optimal IO size, I expect you are using 512bit key, so alignment using default 4k is 4040 sectors (only space for keyslots). So code must align to next multiple of 2048 - it is 4096. Milan _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
