GNU bug report logs - #18920
Parted always chooses the logical sector size.

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Message #17 received at 18920 <at> debbugs.gnu.org (full text, mbox):

From: dE <de.techno <at> gmail.com>
To: 18920 <at> debbugs.gnu.org
Subject: Re: bug#18920: Parted always chooses the logical sector size.
Date: Tue, 04 Nov 2014 20:26:24 +0530

On 11/04/14 03:24, Brian C. Lane wrote:
> On Sun, Nov 02, 2014 at 02:37:09PM +0530, dE wrote:
>> On 11/02/14 02:46, Phillip Susi wrote:
>>> -----BEGIN PGP SIGNED MESSAGE-----
>>> Hash: SHA512
>>>
>>> On 11/01/2014 07:10 AM, dE wrote:
>>>> Can someone please add an option to set the sector size to custom
>>>> or/and the physical sector size?
>>> Why?  Not using the correct sector size doesn't make sense and will
>>> result in incorrect operation.
>>>
>>>
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>> Yes, on a 4K disk, choosing 512 bytes sector size is bad. This's what parted
>> does as of the current time cause it chooses the logical sector size instead
>> of physical.
> Assuming you are talking about linux -- parted uses the logical sector
> size returned by the kernel, which gets it from the drive.  We don't set
> to 512 arbitrarily. So if there is an actual problem it should be
> reported against the kernel.
>

Yes, the kernel reports both -- the logical and the physical. Parted 
knows about it, it shows both the logical and physical sector size, but 
then also it uses the logical sector size. It should not. There must be 
an option at least, and I suggest it should be made the default 
otherwise the partitions may start unaligned.

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