> Hi. > > > Unfortunately this is still rather black magic to me,.. especially when > one combines LVM/MD/partitons and perhaps even the striping options in > ext-filesystems. > > But AFAIK, if you just want to use _LUKS_ (guess this does not work with > plain dm-crypt devices) on partitions, and if you use a recent enough > kernel (IIRC it was 2.6.34) and recent enough cryptsetup (IIRC 1.1.3) > then the alignment should happen automatically. > > The payload offset in the LUKS header is simply set accordingly. > > So AFAIK you shouldn't need to use "-H 32 -S 32"... > > > Any better experts,... please correct me if I'm wrong. > > > Cheers, > Chris. Hi I agree with you on that. I have spent weeks investigating this, but without finding any clear answers. So far i am pretty clear on that i need to align the partitions to EBS (erase block size). The EBS on Intel X25-M SSD is thought to be 512 KiB. By running fdisk with the parameters -H 32 -S 32 the partitions i create will automatically be 512 KiB aligned. Everything would be fine now, if i did not need to encrypt the drive, but because this is a laptop used for work it is a demand. We are using the newest Ubuntu LTS therefore cryptsetup and the Linux kernel are not supporting automatic alignment. If i try to configure LUKS without LVM through partman with everything default and then dump the LUKS header, the "Payload offset" is configured to 2056, but i do not know if this is fine or not? Peter _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
