* Re: [gentoo-user] fdisk warnings during install; questions
@ 2013-05-10 10:26 99% ` pk
0 siblings, 0 replies; 1+ results
From: pk @ 2013-05-10 10:26 UTC (permalink / raw
To: gentoo-user
On 2013-05-10 03:11, Walter Dnes wrote:
>> WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util
>> fdisk doesn't support GPT. Use GNU Parted.
>
> I've repartitioned it 3 or 4 times, but it still comes up with that
> error when I fire up fdisk. Is it a problem, and if so, can I dd a few
> sectors to remove whatever it's complaining about?
I would suggest using a tool that understands both MBR and GPT. One of
the the tools suggested by others in this list should suffice. I would
not recommend using dd.
> 2)
>> The device presents a logical sector size that is smaller than the
>> physical sector size. Aligning to a physical sector (or optimal I/O)
>> size boundary is recommended, or performance may be impacted.
I think most (if not all tools) that understands GPT should be able to
align the disk properly so using such a tool will/should take care of
alignment as well...
> The fdisk default seems to be to start partition 1 at sector 2048. I
> don't know the hardware side of disks. Is that OK.
No idea. All I know is that you cannot trust the firmware of modern
disks to tell you the layout of the disk since it can "move" sectors
around to get around damaged sectors (or do whatever the firmware
developers thinks is best)...
Here's some reading for (perhaps) greater understanding (some) of the
issues:
https://wiki.archlinux.org/index.php/Advanced_Format
https://en.wikipedia.org/wiki/Master_boot_record
https://en.wikipedia.org/wiki/GUID_Partition_Table
Also this seems relevant:
http://superuser.com/questions/352572/why-does-the-partition-start-on-sector-2048-instead-of-63
Best regards
Peter K
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