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