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Date:      Sun, 28 Dec 2014 13:30:51 -0700 (MST)
From:      Warren Block <wblock@wonkity.com>
To:        Steven Hartland <steven@multiplay.co.uk>
Cc:        Dr Josef Karthauser <joe@tao.org.uk>, freebsd-stable@freebsd.org
Subject:   Re: Creating a bootable ZFS disk?
Message-ID:  <alpine.BSF.2.11.1412281326150.86113@wonkity.com>
In-Reply-To: <54A062B7.1080701@multiplay.co.uk>
References:  <1548B1FF-36E2-4AE4-ADD4-3B8872A9DF55@tao.org.uk> <549EC712.3010909@multiplay.co.uk> <549EC87C.2010909@multiplay.co.uk> <BBE0034F-B8F7-4E04-883C-8B4DE409D7E8@tao.org.uk> <alpine.BSF.2.11.1412271553170.60737@wonkity.com> <D0A7BDB3-0808-481C-B454-C45BDA529D17@tao.org.uk> <alpine.BSF.2.11.1412281242160.86113@wonkity.com> <54A062B7.1080701@multiplay.co.uk>

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On Sun, 28 Dec 2014, Steven Hartland wrote:

>
> On 28/12/2014 19:44, Warren Block wrote:
>> On Sun, 28 Dec 2014, Dr Josef Karthauser wrote:
>> 
>>> On 27 Dec 2014, at 22:57, Warren Block <wblock@wonkity.com> wrote:
>>> 
>>>> On Sat, 27 Dec 2014, Dr Josef Karthauser wrote:
>>>> 
>>>>> I only have 'zfs_load=?YES?? in my /boot/loader.conf. I?m hoping the 
>>>>> problem is that I missed the ?-a4k? on the ?gpart add?. I?m starting 
>>>>> again and will report back whether it now works or not! :).
>>>> 
>>>> Misalignment just makes for slow performance, particularly on writes.
>>>> 
>>> 
>>> Ok, fixed. With -a4k is it now booting. Looks like the partitions weren?t 
>>> aligned!
>> 
>> Alignment alone should not have fixed it.  While misaligned drives give 
>> poor performance, they should still work.
>
> Indeed, possibly a bad BIOS?

All too possible.  BIOS authoring seems to be what people too bitter to 
continue being supervillains or cable TV tech support take up.

For testing the possibly-automatic gpart alignment, gnop might work.



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