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To: rgrimes@freebsd.org, "Rodney W. Grimes" <freebsd@pdx.rh.CN85.dnsmgr.net>
cc: Bruce Evans <brde@optusnet.com.au>,
 Julian Elischer <julian@vps1.elischer.org>,
 Warner Losh <imp@freebsd.org>, src-committers@freebsd.org,
 svn-src-all@freebsd.org, svn-src-head@freebsd.org
Subject: Re: svn commit: r316064 - head/sys/boot/i386/boot2
In-reply-to: <201703281555.v2SFtoSU005538@pdx.rh.CN85.dnsmgr.net>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
References: <201703281555.v2SFtoSU005538@pdx.rh.CN85.dnsmgr.net>
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Date: Tue, 28 Mar 2017 18:20:16 +0000
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--------
In message <201703281555.v2SFtoSU005538@pdx.rh.CN85.dnsmgr.net>, "Rodney W=
. Gri
mes" writes:

>I think we still have an 8k size limit on boot1 for ffs/(ufs1 or ufs2)

Having a former release-engineer & disk-I/O renovator on the UFS2
team took care of that:  We tried to be future compatible, and UFS2
will look four different places for the superblock: +64k, +8k, +0k
and +256k, (the latter named SBLOCK_PIGGY because somebody senior
thought even 64k was an outrageous waste of space :-)

-- =

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    =

Never attribute to malice what can adequately be explained by incompetence=
.