Date: Thu, 29 Dec 2016 07:49:15 -0500 From: Stari Karp <starikarp@yandex.com> To: Polytropon <freebsd@edvax.de> Cc: FreeBSD Questions <freebsd-questions@freebsd.org> Subject: Re: swap partition Message-ID: <1483015755.95305.5.camel@yandex.com> In-Reply-To: <20161229130806.914b65a1.freebsd@edvax.de> References: <1483012420.95172.9.camel@yandex.com> <20161229130806.914b65a1.freebsd@edvax.de>
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On Thu, 2016-12-29 at 13:08 +0100, Polytropon wrote: > On Thu, 29 Dec 2016 06:53:40 -0500, Stari Karp wrote: > > > > I like to increase swap partition but I am scary to screw up my > > system. > > FreeBSD is installed on iMac (Mountain Lion). > > > > gpart show > > => 34 1953525101 ada0 GPT (932G) > > 34 6 - free - (3.0K) > > 40 409600 1 efi (200M) > > 409640 1216587112 2 apple-hfs (580G) > > 1216996752 1269536 3 apple-boot (620M) > > 1218266288 1024 4 freebsd-boot (512K) > > 1218267312 727710720 5 freebsd-ufs (347G) > > 1945978032 7547102 6 freebsd-swap (3.6G) > > 1953525134 1 - free - (512B) > > > > What I planning to do: > > Boot to OS X and than decrease apple-hfs partition for 64 GB. > > Than boot to FreeBSD (single user) and: > > swapoff -a > > gpart resize -i6 ada0 > > swapon -a > > > > Do I need to use gpart resize -i6 -s 64G ada0 or gpart will find > > empty > > space and use it, please? > I don't think this is possible. Partitions have to be coherent > disk space. If I read your current layout correctly, shrinking > ada0p2 (apple-hfs) would leave a "hole" before ada0p3 (apple-boot), > but your swap space is ada0p6. > > However, you can add a second swap space (and maybe even ignore > your existing one), so the final layout could be this: > > ada0p1 efi (200M) > ada0p2 apple-hfs (580G - 64G) <--- shrink > ada0p3 freebsd-swap (64G) <--- create in "hole" > ada0p4 apple-boot (620M) > ada0p5 freebsd-boot (512K) > ada0p6 freebsd-ufs (347G) > ada0p7 freebsd-swap (3.6G) <--- maybe ignore > > However, I don't have experience regarding partitioning on > Mac OS X systems, but from a "logic point of view", this sounds > reasonable. I'm also not sure if repartitioning will cause > partition numbers to change, or if the offset and size will > be assigned accordingly (so the new partition would become > ada0p7). > > > > > > > Should I format on OS X empty space to FAT? > No, leave it untouched, "empty space", unallocated. A swap > partition doesn't need a file system, in fact, is _has to be_ > void of a file system. > Resizing apple-hfs is not a problem, what I am scary more is changes of partition numbers. It will be nice if I could add empty space to the end. I didn't ose OS X years and I need to check what can I do. I just know that was easy when I shrink hfs for Installed FreeBSD. Thank you very much.
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