Hello you with the unknown real name, Am Dienstag, 28. Oktober 2014, 08:54:56 schrieb dE: > On 10/28/14 00:37, Felix Miata wrote: > > dE composed on 2014-10-28 00:13 (UTC+0530): > >> I was learning about GPT when I noticed this behavior of fdisk which I > >> never though about before. > >> Regardless of the partition table, fdisk always starts the first > >> partition at 2048. In reality, the maximum size required by the gap > >> between MBR and the 1st partition is a single sector, which's used by > >> GRUB 1.5. GPT doesn't need this space at all. > >> Then extended partitions too have a gap of 2048 sectors. > >> Why this behavior? > > > > http://www.seagate.com/tech-insights/advanced-format-4k-sector-hard-drives > > -master-ti/ may provide some insight WRT performance issues ensuing from > > other start sector selections. > > But that works even with multiples of 8. So we can start from sector 8 > in MBR and 40 in GPT. But then you have SoftRAID or Hardware RAID with 64 or 512 KiB chunk size. Or you have SSD/PCIe or other flash with erase block sizes and so son. 1 MiB is dividable by these usual sizes. Why is this an issue for you? Also see -c=dos switch or interactive "c" command: merkaba:~> LANG=C fdisk /dev/sda Welcome to fdisk (util-linux 2.25.2). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. Command (m for help): c DOS Compatibility flag is set (DEPRECATED!) Command (m for help): o " Created a new DOS disklabel with disk identifier 0x7c1893d1. Command (m for help): n Partition type p primary (0 primary, 0 extended, 4 free) e extended (container for logical partitions) Select (default p): p Partition number (1-4, default 1): First sector (63-586072367, default 63): "DOS-compatible mode is deprecated." is in red :) Ciao, -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 -- To unsubscribe from this list: send the line "unsubscribe util-linux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
