[gentoo-user] Re: mac-fdisk with different block size

On 2019-01-13, Andrew Udvare wrote:

>> On Jan 13, 2019, at 09:24, (Nuno Silva) <nunojsilva@×××××××.pt> wrote:
>>
>> On 2019-01-13, Andrew Udvare wrote:
>>
>>>> On 2019-01-13, at 07:49, (Nuno Silva) <nunojsilva@×××××××.pt> wrote:
>>>>
>>>> I am trying to create an Apple partition map with a block size of 4096
>>>> bytes, but I can't find an option to change the block size in mac-fdisk,
>>>> which defaults to 512 bytes.
>>>>
>>>> Does anybody know of a utility that can create and modify such partition
>>>> maps under Gentoo?
>>>
>>>
>>> Quick look and it seems that for mac-fdisk the 512 size is hard-coded:
>>>
>>> https://github.com/glaubitz/mac-fdisk-debian/blob/bda743065fa2c75a83fec60166bc2e317059ef7a/io.h#L32
>>
>>
>> That code appears to be version 0.4 from early 1997. Under Gentoo, the
>> README file installed at /usr/share/doc/mac-fdisk-0.1_p18/ mentions 0.4
>> as well.
>>
>> According to a changelog at apple.com[1], variable block size support
>> was added after that, and should be present in version 0.5.
>
> On actual macOS latest, there's a -b option for block size.

GNU parted does not seem to have an option to *change* the block size,
but it will use the drive's block size when creating a new Apple
partition table.

-- 
Nuno Silva