Date: Mon, 08 Aug 2016 15:00:51 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 211361] suggested boot partition size is too small, bsdinstall creates unaligned partitions Message-ID: <bug-211361-8-abjGN77kE0@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-211361-8@https.bugs.freebsd.org/bugzilla/> References: <bug-211361-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D211361 --- Comment #9 from Nathan Whitehorn <nwhitehorn@FreeBSD.org> --- I would like to see this done in the kernel preferred IO alignment reporting rather than the installer. This limits the amount of magic in the installer= and fixes similar issues in the rest of the system. There are three options to solve this problem, in general: 1. The kernel makes up a number. The installer, gpart, and sade align to th= at number. It may become stale if new, weird hardware appears. 2. The installer makes up a number and aligns to it. sade is the installer,= so it follows along. gpart doesn't and creates misaligned partitions by defaul= t on systems that currently have problems (as do other disk tools, like graid). = sade and gpart end up with different behaviors. The number may become stale in t= he same way. 3. The status quo. The kernel tries to figure out the right number, but it = is too small on some hardware. The installer, gpart, and sade align to that number. It is already wrong in some cases. #1 seems strictly better than #2 here. The numbers in both cases may become stale, but you don't have to make the same fix in a bunch of places in #1 or end up in a situation where gpart and the curses version of gpart (sade) ha= ve different behavior. It also makes ZFS and graid and whatever follow along instead of picking too-small IO chunks by default on affected systems. The = ZFS issue in particular is probably at least as serious as the alignment of UFS boot partitions. --=20 You are receiving this mail because: You are the assignee for the bug.=
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