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.
Also I'm pretty sure fdisk uses 2048 even with -b 4096, but
unfortunately I get --
*** Error in `fdisk': malloc(): memory corruption: 0x0000000002507330 ***
with that switch.
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