Active slice, only for a next boot

[Julian Elischer]

On 5/27/11 11:34 AM, Warner Losh wrote:
> On May 27, 2011, at 10:47 AM, rank1seeker at gmail.com wrote:
>
>> ----- Original Message -----
>> From: Alexander Best<arundel at freebsd.org>
>> To: rank1seeker at gmail.com
>> Cc: hackers at freebsd.org
>> Date: Fri, 27 May 2011 13:47:54 +0000
>> Subject: Re: Active slice, only for a next boot
>>
>>> On Fri May 27 11, rank1seeker at gmail.com wrote:
>>>> Idea is ...
>>>> I have i.e; 3 slices, of which first is active.
>>>> Now I wana set slice 2 active, but only for a one/next boot.
>>>> Once slice 2 is booted and system is shutdown or rebooted, once again,
>> first slice is active and booted, without user's intervention.
>>>> Is this possible or should be implemented?

nextboot(8) USED to do this before it was broken by someone to "look 
into the filesystem"
for it's next boot hint which is obviously broken if you are trying to 
get to another filesystem
because the main one is broken.

>>> take a look at the gpart(8) manual, expecially the ATTRIBUTES section. if
>> you
>>> are running with a GPT scheme you can use the "bootonce" attribute to do
>>> exactly what you asked for.
>>>
>>> cheers.
>>> alex
>>>
>> Thanls, but I need it for MBR.
> gpart works with MBR.
>
> Warner
>
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