Date: Wed, 21 Jun 1995 02:14:08 +1000 From: Bruce Evans <bde@zeta.org.au> To: ache@astral.msk.su, hackers@freebsd.org Subject: Re: Just FYI, new bootblocks unable to load old (pre-slice) systems Message-ID: <199506201614.CAA17112@godzilla.zeta.org.au>
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>Maybe it is intentional, but very unpleasant :-(
>New bootblocks says:
>partition is out of reach from the bios
>on old default partition: 255,1023,63 50000
It's got nothing to do with the default partition. The check is
if (max_sector_in_FreeBSD_boot_partition / sectors_per_cylinder > 1024)
^^^^ from disklabel ^^^^^^^^^^^^^^^^ ^^^^ from BIOS ^^^^^ ^ bug
error("partition is out of reach...");
Booting from FreeBSD partitions that have one or more sectors beyond (>= :-)
cylinder 1024 can't be guaranteed because /kernel or its metadata might have
sectors beyond cylinder 1024. Such partitions should be rare - keeping the
root partition small guarantees that it is below cylinder 1024 if it starts
at cylinder 0.
>Converting it to right partition via sysinstall is impossible
>due to different start offset.
And wouldn't help.
Bruce
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