Date: Mon, 2 Sep 2019 05:04:52 -0700 From: "Thomas D. Dean" <tomdean@wavecable.com> Cc: freebsd-questions@freebsd.org Subject: Re: Convert MBR Partitions to GPT Message-ID: <0e0c086c-a907-d224-98b8-9486d921e7a5@wavecable.com> In-Reply-To: <20190902133941.e563291f.freebsd@edvax.de> References: <1ef6d7eb-a7c9-2a5d-12b2-20c4ef255523@wavecable.com> <20190902133941.e563291f.freebsd@edvax.de>
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On 9/2/19 4:39 AM, Polytropon wrote: > On Sun, 1 Sep 2019 19:47:33 -0700, Thomas D. Dean wrote: >> I have 5 disk drives, with two (same) OS's. Actually, two drives have >> Windows 7 and its secondary plex. From an earlier post: >> >> sata6g_1 HD0 SSD ubuntu 18.04 >> sata6g_2 HD1 WD5000 Ubuntu 18.04 >> sata3g_3 HD2 WD5000 windows 7 - not used >> sata3g_4 HD3 WD5000 backup >> sata3g_5 HD4 WD5000 windows 7 secondary plex- not used >> sata3g_6 DVD DRW-24B3LT >> sata6g_E1 (empty) >> sata6g_E2 (empty) >> >> I plan to keep the SSD Ubuntu install until I can get FreeBSD up and >> running the way I want. >> >> So, for now, I want to install FreeBSD on sata3g_5 HD4. >> >> My motherboard, ASUS P9X79 PRO has support for UEFI boot. >> >> Is it worth the effort to change everything to GPT, or, should I just >> use GPT on the FreeBSD disk? I am leaning toward the later, but, ... >> >> I think the future has a SSD for FreeBSD. > > Don't confuse UEFI and GPT. :-) > > YOu can use both GPT and MBR (not on the same disk, of course, > but on different disks). Choosing MBR is suggested today only > for the few cases where it's absolutely needed. Use GPT if you > can. > > You cannot "convert" between the two except via "backup, re-init, > restore", which probably is not what you have in mind. > > But as it is about a new installation of FreeBSD into a multi-OS > setting, I'd suggest to leave everything untouched, install > FreeBSD on its disk using GPT partitioning, and add a "chain loader" > entry to GRUB configuration that boots FreeBSD. GRUB can understand > both MBR and GPT, so it doesn't matter. > Something, possibly BSDinstall or, maybe something unknown made the 2 Windows 7 disks unbootable. Great, now I can use them for something other than adding weight to the box. I changed HD2, sdc to GPT with gparted. I installed Ubuntu 18.04 on it. I booted sda and used update-grub2. Seemed to go OK, but I could not get grub to boot sdc. The boot menu listed sdc, but when selected igrub actually booted sda. Looking at boot/grub/grub.cfg, I see the menuentry for sdc to have the same values as sda. grub bug?? Tom Dean
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