Date: Wed, 28 Dec 2016 16:04:17 -0500 From: Allan Jude <allanjude@freebsd.org> To: freebsd-hackers@freebsd.org Subject: Re: ZFS and GPT boot - size issue bootblock v.s. default of sysinstall Message-ID: <068c90c2-61c0-2fbc-3984-0bc937e19d63@freebsd.org> In-Reply-To: <AB657A06-8886-4EA5-9323-92317707B039@webweaving.org> References: <AB657A06-8886-4EA5-9323-92317707B039@webweaving.org>
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On 2016-12-28 14:41, Dirk-Willem van Gulik wrote: > On a default ZFS install (late 2014, 10.x) of a few years hence it seems sysinstall selected 64k as the default size of partition 1: with the bootblock: > > sudo gpart show > => 34 7814037101 ada0 GPT (3.6T) > 34 6 - free - (3.0K) > 40 128 1 freebsd-boot (64K) > 168 67108864 2 freebsd-swap (32G) > 67109032 7746928096 3 freebsd-zfs (3.6T) > 7814037128 7 - free - (3.5K) > > …. lots of disks snipped ….. > > => 34 7814037101 ada35 GPT (3.6T) > 34 6 - free - (3.0K) > 40 128 1 freebsd-boot (64K) > 168 67108864 2 freebsd-swap (32G) > 67109032 7746928096 3 freebsd-zfs (3.6T) > 7814037128 7 - free - (3.5K) > > Fair to assume that this (the 64k) is the reason that from 11.x onwards; > > gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ada0 > > fails with an immediate: > > gpart: /dev/ada1p1: not enough space > > as gptzfsboot has grown in recent years to something towards the 90k mark ? > > -r--r--r-- 1 root wheel 88898 Dec 24 11:52 /boot/gptzfsboot > > And I guess avoiding a rebuild would mean something like gently disabling swap; shifting partition 1 & 2 carefully an so on ? Or is there a more clever way? ZFS has *already* been upgraded. > > Or am I missing something ? > > Thanks, > > Dw > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" > swapoff -a; gpart resize ...; swapon -a is likely your best bet. The other option is to rebuild gptzfsboot without GELI support, and then it will be under 64 KB. -- Allan Jude
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