Date: Thu, 9 May 2019 01:17:33 +0200 From: Miroslav Lachman <000.fbsd@quip.cz> To: Pete French <petefrench@ingresso.co.uk>, freebsd-stable@freebsd.org Subject: Re: ZFS... Message-ID: <7b7b9165-8f83-5195-2e4a-4c0e7c85307d@quip.cz> In-Reply-To: <30d1cf2a-b80c-822b-11f9-2139532f7858@ingresso.co.uk> References: <30506b3d-64fb-b327-94ae-d9da522f3a48@sorbs.net> <CAOtMX2gf3AZr1-QOX_6yYQoqE-H%2B8MjOWc=eK1tcwt5M3dCzdw@mail.gmail.com> <56833732-2945-4BD3-95A6-7AF55AB87674@sorbs.net> <3d0f6436-f3d7-6fee-ed81-a24d44223f2f@netfence.it> <17B373DA-4AFC-4D25-B776-0D0DED98B320@sorbs.net> <70fac2fe3f23f85dd442d93ffea368e1@ultra-secure.de> <70C87D93-D1F9-458E-9723-19F9777E6F12@sorbs.net> <CAGMYy3tYqvrKgk2c==WTwrH03uTN1xQifPRNxXccMsRE1spaRA@mail.gmail.com> <fe6880bc-d40a-2377-6bea-28bfd8229e9f@sorbs.net> <58DA896C-5312-47BC-8887-7680941A9AF2@sarenet.es> <cde21bb4-d741-3300-077f-745cfc343aa9@ingresso.co.uk> <8a53df38-a094-b14f-9b7d-8def8ce42491@quip.cz> <30d1cf2a-b80c-822b-11f9-2139532f7858@ingresso.co.uk>
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Pete French wrote on 2019/05/03 14:28:
>
>
> On 03/05/2019 13:11, Miroslav Lachman wrote:
>
>> I had this problem in the past too. I am not sure if it was on Dell or
>> HP machine - controller presents first disk only in the boot time so I
>> created small (10 - 15GB partition) on each disk and use them all in 4
>> way mirror. Cannot say if it was gmirror with UFS or ZFS mirroring.
>> The rest of the each disk was used for ZFS RAIDZ.
>
> Snap :-) Thats exactly what I have done - but the bits you cant mirror
> are the GPT partititons for bootcode. I was fiddling with hose of da0
> without realising it was now using da1 to boot. If it ever chooses da2
> or da3 then I will need to mirror it there too, so I have it partitioned
> like that, but am currently using those as swap as it shows no signs of
> wanting to boot from them for now.
Time for some scripting :) This is what I have on the machine with weird
controller
# cat bin/zfs_bootcode_update.sh
#!/bin/sh
devs="ada0 ada1 ada2 ada3"
for dev in $devs
do
echo -n "Updating ZFS bootcode on ${dev} ..."
if ! /sbin/gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i
1 ${dev} > /dev/null; then
echo " error"
exit 1
fi
echo " done"
done
So it should be able to boot from any installed drive, no matter the order.
Miroslav Lachman
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