Date: Sun, 27 Mar 2016 10:12:33 -0500 From: Brandon J. Wandersee <brandon.wandersee@gmail.com> To: Teng Zhang <zhangteng331@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: bootable freebsd slice's limit Message-ID: <86h9fsnee6.fsf@WorkBox.Home> In-Reply-To: <CAAb0nh1S%2BEQboRWSu6moqhuWJnwosCQ3ozvFYs7_D2M6mi8dAw@mail.gmail.com> References: <CAAb0nh0=_tFUoYfULp2j%2B6gXD1g91yciaaODPqmd4XV6sshffQ@mail.gmail.com> <CAAb0nh3H4GMMEqM9uZMwf_Xqi=rP58H8nA4ef5wSnCO3L7CA2g@mail.gmail.com> <CAAb0nh1S%2BEQboRWSu6moqhuWJnwosCQ3ozvFYs7_D2M6mi8dAw@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Teng Zhang writes: > In man fdisk(8), it refers to > "Note that bootable FreeBSD slices (the ``*/*'' file system) must lie > completely within the first 1024 cylinders; if this is not true, booting > may fail." > my confusion is whether this limit is aimed at just i386 platform > or all platforms that freebsd supports. Could you please tell me the actual > condition ? Hopefully someone will correct me if I'm wrong, but I don't believe the limitation is related to machine architecture. Rather, it has to do with how the legacy bootloader handles older disks with a 512k sector size and an MBR partition table. I would guess that you are asking out of concern for on-disk filesystem alignment? Is there any particular reason you cannot use GPT via gpart(8), rather than MBR via fdisk(8)? -- :: Brandon J. Wandersee :: brandon.wandersee@gmail.com :: -------------------------------------------------- :: 'The best design is as little design as possible.' :: --- Dieter Rams ----------------------------------
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?86h9fsnee6.fsf>