Date: Tue, 21 Jan 2014 12:45:36 +0200 From: Andriy Gapon <avg@FreeBSD.org> To: "Andrey V. Elsukov" <bu7cher@yandex.ru>, Thomas Hoffmann <trh411@gmail.com>, freebsd-current <freebsd-current@FreeBSD.org> Subject: Re: Problem updating bootcode on ZFS on root system with MBR Message-ID: <52DE4FD0.5030409@FreeBSD.org> In-Reply-To: <52DE3F6B.6050209@yandex.ru> References: <CAB7-odnL13m-Pnf3R6YvidVx3ycHt7F%2BKk5TW2K9CjzYWy5evA@mail.gmail.com> <52DE3F6B.6050209@yandex.ru>
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on 21/01/2014 11:35 Andrey V. Elsukov said the following: > On 20.01.2014 23:32, Thomas Hoffmann wrote: >> I am running 11.0-CURRENT (r260850) with zfs on root with MBR. >> >> After upgrading my 10.0-RELEASE (r260669) system to 11.0-CURRENT (r260850) >> my zpools reported that they needed to be upgraded. So, I upgraded my >> zpools and I am attempting to update the bootcode (as required). I managed >> to get the boot1 stage code updated, but cannot get the boot2 stage code >> updated. Here is what I have done: >> >> # sysctl kern.geom.debugflags=0x10 >> kern.geom.debugflags: 0 -> 16 >> >> # dd if=/boot/zfsboot of=/tmp/zfsboot1 count=1 >> 1+0 records in >> 1+0 records out >> 512 bytes transferred in 0.014996 secs (34142 bytes/sec) >> >> # gpart bootcode -b /tmp/zfsboot1 /dev/ada0s1 >> bootcode written to ada0s1 >> >> # dd if=/boot/zfsboot of=/dev/ada0s1a skip=1 seek=1024 >> dd: /dev/ada0s1a: Operation not permitted >> >> The final dd statement fails with "operation not permitted". In all my >> research, understood the initial sysctl command I ran would prevent this >> particular error from happening. >> >> What do I need to do to get the boot2 code written to /dev/ada0s1a? > > This will work only if ada0s1a isn't in use. The debugflags trick works > only for whole disk, i.e. for geoms with rank=1. Another way is > calculate needed offset and write bootcode directly to ada0. And ultimately we should extend our ZFS interface with an ioctl to write a blob to a boot code area of a specified ZFS leaf vdev. This would the right way to install zfsboot. -- Andriy Gapon
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