Date: Fri, 4 Jan 2013 17:14:02 +0000 (UTC) From: naddy@mips.inka.de (Christian Weisgerber) To: freebsd-questions@freebsd.org Subject: bsdinstall misaligns partitions Message-ID: <kc72kq$158v$1@lorvorc.mips.inka.de>
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Shouldn't bsdinstall attempt to align partitions on 4k boundaries both for the benefit of 4k drives and flash storage? I just installed 9.1R i386 for fun and practice, in fact I installed it several times, and I played around with the partitioning options. * The modern GPT scheme reserves 34 sectors at the start of the disk. Your newly created partitions will start at offset 34 and will therefor be misaligned. I ended up configuring a 63 kB freebsd-boot partition, which ensures that the following partitions are aligned. * The old MBR scheme is even worse. The FreeBSD slice will start at sector 63, guaranteeing that any partitions contained within will be misaligned. There is no way to fix this, unless you shell out and run fdisk manually. * Funnily enough, the ancient BSD "dangerously dedicated" scheme is the only one that out of the box does not misalign partitions. I'm presumably not the first one to notice this issue, and yes, I'm mostly just venting. -- Christian "naddy" Weisgerber naddy@mips.inka.de
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