Date: Fri, 21 Nov 2014 15:32:36 -0700 (MST) From: Warren Block <wblock@wonkity.com> To: Nathan Whitehorn <nwhitehorn@freebsd.org> Cc: Rostislav Krasny <rosti.bsd@gmail.com>, freebsd-sysinstall@freebsd.org Subject: Re: Dangerously dedicated mode with FreeBSD 10.1 Message-ID: <alpine.BSF.2.11.1411211527040.27494@wonkity.com> In-Reply-To: <546F6D79.9060909@freebsd.org> References: <CANt7McFwQJNmBEJGTed%2B27K%2BVAY80V1zJSXBwHC0TmrX1iyPpw@mail.gmail.com> <alpine.BSF.2.11.1411210815470.12278@wonkity.com> <546F6D79.9060909@freebsd.org>
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On Fri, 21 Nov 2014, Nathan Whitehorn wrote: > > On 11/21/14 07:26, Warren Block wrote: >> On Fri, 21 Nov 2014, Rostislav Krasny wrote: >> >>> Hi, >>> >>> I've a server with FreeBSD 7.4-STABLE that uses two phisical disks in >>> a so called "dangerously dedicated mode". There is no other operating >>> system and no plan to install anything else but FreeBSD. So in my case >>> this is not dangerous mode at all. >>> >>> I want to upgrade it by installing FreeBSD 10.1 from scratch and I >>> want to use the dedicated disk mode again. How could I do that? >>> >>> If I understand it right the new bsdinstall(8) doesn't support the >>> dedicated disk mode, the old sysinstall(8) is already dead and the >>> only solution is a manual disk partitioning from shell. The 2.6.5. >>> Shell Mode Partitioning section of the Handbook is very terse about >>> that. >> >> If you are determined, it should be possible to select a bsdlabel-only >> format with the Manual partitioning option in the menus, or enter Shell >> mode on startup and create it with gpart or even bsdlabel. That said, I >> can't think of any advantages of using a bare bsdlable at all. With 10.1, >> GPT is available, supports large disks, and is easily alignable.* > > Right, just select "BSD" as the partition type. > >> *: although it is reported that bsdinstall for 10.1 does not automatically >> do 4K alignment. But at least there are advantages to using it as a >> partition scheme. > > This has never been true. It does 4K alignment on disks with 4K physical > sectors (no matter what the logical sector size is). If you have disks with > larger sectors or preferred boundaries (e.g. a striped RAID), it will also > align to that. I know that it did not automatically do that alignment originally, which was why I entered PR 161720: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=161720 After that, I thought it was fixed, and now this appears to be a regression: http://forums.freebsd.org/threads/does-bsdinstall-in-10-1-properly-partition-ssds.48993/
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