Gentoo Archives: gentoo-user

From: Mick <michaelkintzios@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Re: Who believes in cylinders?
Date: Sun, 28 Feb 2010 11:14:48
Message-Id: 201002281114.00671.michaelkintzios@gmail.com
In Reply to: Re: [gentoo-user] Re: Who believes in cylinders? by Etaoin Shrdlu
1 On Saturday 27 February 2010 18:20:24 Etaoin Shrdlu wrote:
2 > On Saturday 27 February 2010, BRM wrote:
3 > > Stage 1 focuses solely on loading Stage 2,
4 > > and has historically been limited to a total size[1] to 512 bytes,
5 >
6 > It's actually less than that, because the first 64 bytes of sector 0
7 > contain the partition table, so the maximum size of a stage1 bootloader is
8 > 510 - 64 = 446 bytes.
9
10 Yep, that's why dd if=/dev/sda of=~/partition_table.img bs=446 count=1 will
11 make you a nice back up of your partition table, while bs=512 will back up
12 your complete MBR.
13 --
14 Regards,
15 Mick

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