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From: Grant Edwards <grant.b.edwards@gmail.com>
Subject: [gentoo-user] Re: Install from USB stick; here's how
Date: Tue, 3 Sep 2013 21:19:08 +0000 (UTC)
Message-ID: <l05joc$f96$2@ger.gmane.org>
References: <20130107030508.GA22701@waltdnes.org>
<l054si$19s$1@ger.gmane.org> <52264BA2.6070004@gmail.com>
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On 2013-09-03, Alan McKinnon <alan.mckinnon@gmail.com> wrote:
> On 03/09/2013 19:05, Grant Edwards wrote:
>> On 2013-01-07, Walter Dnes <waltdnes@waltdnes.org> wrote:
>>
>>> For those of you who don't want to do the tap-dance listed at...
>>> http://www.gentoo.org/doc/en/liveusb.xml
>>>
>>> * My netbook's harddrive is normally /dev/sda, except when I boot from a
>>> USB stick. The stick will become /dev/sda and the harddrive becomes
>>> /dev/sdb
>>>
>>> * My desktop's harddrive is also /dev/sda. I took the linux minimal
>>> install ISO, ran isohybrid on it, with the command...
>>>
>>> isohybrid install-x86-minimal-20121213.iso
>>>
>>> If you don't have isohybrid...
>>>
>>> emerge sys-boot/syslinux
>>>
>>> * I then copied it over to a USB stick (/dev/sdb) with the command...
>>>
>>> dd bs=4M if=install-x86-minimal-20121213.iso of=/dev/sdb
>>
>> I did a 64-bit install from USB flash-drive a few days ago using the
>> older tap-dance, and it worked fine -- except I discovered one of my
>> "must have" apps is 32-bit only and didn't work correctly when run in
>> 32-bit emulation mode (I don't know why).
>>
>> So I tried Walter's recipe yesterday to do a 32-bit install.
>>
>> After running the isohybrid command, I compared the resulting image
>> with the original. They were identical. I copied the image to a USB
>> flash drive, and it booted just fine.
>>
>> It seems that the minimal install .iso images are already built for
>> hybrid booting from either CD or a generic block device (e.g. USB
>> mass-storage device).
>>
>> So what's the deal with http://wiki.gentoo.org/wiki/LiveUSB/HOWTO?
>>
>> Why isn't it just the steps below?
>>
>> 1) Copy the minimal install .iso to USB mass storage device.
>>
>> 2) Boot from USB mass storage device.
>
> Copying an .iso to a USB stick does not give you a bootable USB
> stick.
It does for recent Gentoo minimial install .iso images.
> It gives you a USB stick with one large file, without bootloader, and
> the BIOS code can't make sense of it.
All my machines seem to.
> USB mass storage devices are not CDs, you can't just dd an ISO9660
> image to a USB stick and expect it to work
But it _does_ work. I tried it with a couple different minimal
install .iso files and a couple different machines.
--
Grant Edwards grant.b.edwards Yow! What's the MATTER
at Sid? ... Is your BEVERAGE
gmail.com unsatisfactory?