Re: Can't boot from pendrive

[Rodolfo Medina <rodolfo.medina@gmail.com>]

Brian <ad44@cityscape.co.uk> writes:

> On Sat 24 Jan 2015 at 15:41:05 +0000, Rodolfo Medina wrote:
>
>> Brian <ad44@cityscape.co.uk> writes:
>> 
>> > On Sat 24 Jan 2015 at 15:18:28 +0000, Rodolfo Medina wrote:
>> >
>> >> Brian <ad44@cityscape.co.uk> writes:
>> >> 
>> >> > On Sat 24 Jan 2015 at 12:26:02 +0000, Rodolfo Medina wrote:
>> >> >
>> >> >> From:
>> >> >> 
>> >> >>  http://www.us.debian.org/CD/netinst/
>> >> >> 
>> >> >> I downloaded the file debian-7.8.0-i386-netinst.iso and copied it onto
>> >> >> a pendrive with:
>> >> >> 
>> >> >>  $ dd if=debian-7.8.0-i386-netinst.iso of=/dev/sdc bs=4M; sync
>> >> 
>> >> That was actually `sdb1', not `sdc', sorry.
>> >
>> > That's not an ok command if you want the stick to be bootable. Try
>> > /dev/sdb.
>> 
>> How do I restore the pendrive?  Now there's no space left, or permissions
>> are denied.
>
> No restoring is needed.
>
>    dd if=debian-7.8.0-i386-netinst.iso of=/dev/sdX bs=4M; sync
>
> will obliterate the drive's contents.
>
> Note it is /dev/sdX, not /dev/sdXN. Writing to partition number N will
> not make the drive bootable.


The command

    dd if=debian-7.8.0-i386-netinst.iso of=/dev/sdb bs=4M; sync

, if given as a normal user, gets the `permission denied', and, as superuser,
the complain that there's `no space left' on the device.

Thanks,

Rodolfo