On 2019-01-13, Andrew Udvare wrote: >> On Jan 13, 2019, at 09:24, (Nuno Silva) <[email protected]> wrote: >> >> On 2019-01-13, Andrew Udvare wrote: >> >>>> On 2019-01-13, at 07:49, (Nuno Silva) <[email protected]> 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
