On Jun 21, 2014, at 1:12 PM, Daniel Cegiełka <daniel.cegielka@xxxxxxxxx> wrote: > 2014-06-19 2:07 GMT+02:00 Russell Coker <russell@xxxxxxxxxxxx>: > >> For boot disks I use the traditional partitioning system. So far I don't run >> any systems that have a boot disk larger than 2TB so I haven't needed to use >> GPT. >> >> I have a BTRFS RAID-1 on 2*3TB disks which have no partition tables, when the >> filesystem is going to use the entire device and there's no boot loader there >> is no reason to have a partition table. > > ok, but what about alignment? This can have a significant impact on performance. The 64KB Btrfs bootloader pad is 8 sector aligned, so for 512e AF disks there's no problem formatting the whole drive. The alignment problem actually happens when partitioning it, using old partition tools that don't align on 8 sector boundaries. There are some such tools still floating around. Chris Murphy-- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
