Grub installation on a USB external disk
Mikkel L. Ellertson
mikkel at infinity-ltd.com
Tue Sep 25 17:12:38 UTC 2007
antonio montagnani wrote:
> 2007/9/25, Mikkel L. Ellertson <mikkel at infinity-ltd.com>:
>> antonio montagnani wrote:
>>> I want to install grub on my USB disk, in order to start up any laptop
>>> and in order not to srew my Vista system.
>>> I think that I have to issue
>>>
>>> grub-install /dev/sda
>>>
>>> where sda is my USB disk and after booting from my CD.
>>>
>>> tnx for patience.
>> Double check that. On my system, when you boot from a CD/DVD, the
>> laptop drive is /dev/sda and the USB drive is /dev/sdb. I forgot to
>> save your fdisk output, so I can not double check that.
>>
>>
>>
> from fdisk -l, I get:
> fdisk -l
>
> Disco /dev/sda: 160.0 GB, 160041885696 byte
>
> 255 heads, 63 sectors/track, 19457 cylinders
> Unità = cilindri di 16065 * 512 = 8225280 byte
>
> Dispositivo Boot Start End Blocks Id System
> /dev/sda1 * 1 13 104391 83 Linux
> /dev/sda2 14 19457 156183930 8e Linux LVM
>
> Disco /dev/sdb: 160.0 GB, 160041885696 byte
>
> 255 heads, 63 sectors/track, 19457 cylinders
> Unità = cilindri di 16065 * 512 = 8225280 byte
>
> Dispositivo Boot Start End Blocks Id System
> /dev/sdb1 1 1274 10233373+ 27 Sconosciuto
> /dev/sdb2 * 1275 10383 73162752 6 FAT16
> /dev/sdb3 10383 19458 72892416 7 HPFS/NTFS
>
> a question is: why on your system is sda the internal HD and sdb the
> USB disk, while on my exactly the other way round???
>
Interesting. Maybe because you are loading the USB storage driver in
the initrd, and then loading the IDE drivers after that. I think
that if you booted from the rescue CD or install DVD, they would be
mapped the other way. I never needed to go the custom boot CD route.
In any case, this is why you double check things.
Mikkel
--
Do not meddle in the affairs of dragons,
for thou art crunchy and taste good with Ketchup!
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