From: Michael Hampicke <mh@hadt.biz>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] Re: [O/T] RAID help - now won't boot
Date: Sun, 20 Oct 2013 15:31:04 +0200 [thread overview]
Message-ID: <5263DB18.6020409@hadt.biz> (raw)
In-Reply-To: <201310201413.59198.michaelkintzios@gmail.com>
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Am 20.10.2013 15:13, schrieb Mick:
> On Sunday 20 Oct 2013 13:57:34 Michael Hampicke wrote:
>> Am 20.10.2013 11:54, schrieb Mick:
>>> Any ideas why the Ubuntu installation won't boot?
>>
>> My guess would be, you cannot boot, because if you install grub in
>> /dev/md0.
>>
>> Upon boot the bios cannot find stage1 of the bootloader, which normally
>> lies in the MBR (which also houses the partition table).
>
> I see ... so installing the MBR code in the /dev/md0 block device is further
> down the disk than where BIOS is looking for it and that's why it errors out?
>
That would be my guess. Maybe someone more knowledgeable on how mdadm
writes stuff on the disk can jump in and provide additional info. But
I'm pretty sure, if you install grub in md0, it's not in that place on
the disk where the bios is actually looking for.
>
> It seems to me then that I *have* to create normal partitions on /dev/sda &
> /dev/sdb, or I would need a different boot drive. Is there another way to
> overcome this problem.
Maybe create two mds. md1 (sda1, sdb1) is a small boot partition which
contains stage2+, the kernel and the initramfs. And md2 (sda2, sdb2)
which acts as another block device with partition table, etc...
In this setup you could install grub in the mbr of sda and sdb
(grub-install /dev/sda...)
A quick google on this subject returned no usable results. But I am off
now until tomorrow.
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next prev parent reply other threads:[~2013-10-20 13:31 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-15 7:34 [gentoo-user] RAID help Mick
2013-10-15 19:28 ` Paul Hartman
2013-10-15 21:42 ` Mick
2013-10-16 18:10 ` [gentoo-user] " Nicolas Sebrecht
2013-10-16 20:14 ` Nicolas Sebrecht
2013-10-17 5:33 ` Mick
2013-10-20 9:54 ` [gentoo-user] Re: [O/T] RAID help - now won't boot Mick
2013-10-20 12:57 ` Michael Hampicke
2013-10-20 13:13 ` Mick
2013-10-20 13:31 ` Michael Hampicke [this message]
2013-10-20 14:31 ` joost
2013-10-21 5:33 ` Mick
2013-10-21 5:59 ` J. Roeleveld
2013-10-21 8:24 ` Nicolas Sebrecht
2013-10-21 8:55 ` J. Roeleveld
2013-10-21 21:42 ` Mick
2013-10-22 7:10 ` Nicolas Sebrecht
2013-10-24 18:53 ` Mick
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