Re: EFI booting from external USB pen drive

From: David Mimms <mentalbarcode_at_fastest.cc>
Date: Thu, 05 Jul 2018 10:50:56 -0400
Bjoern,

I had this problem earlier this week while using FreeBSD-12.0-CURRENT-amd64-20180628-r335760-memstick.img on my ThinkPad P50.

I had used `dd` to place the img file on a partition (e.g. /dev/sdb1) of the USB pen drive and it wouldn't boot properly.

After I used `dd` to place the img on the entire device (e.g. /dev/sdb), I noticed that it had its own partition scheme with three partitions, and that booted just fine.

DM


On Thursday, July 5, 2018 10:30:51 AM -04 Bjoern A. Zeeb wrote:
> Hi,
> 
> while I can boot memstick images just fine (which are created using 
> makefs/mkimg), doing the same thing using gpart/newfs_msdos -F 12/.. I 
> am not able to get anything that boots.
> 
> On a Thinkpad (secure boot is off) from the “boot device chooser from 
> ‘BIOS’” I get a quick blank screen and am back at the chooser.  
> I’ve tried the gpart “thinkpad hack” as well as trying an MBR (why 
> that should work I don’t know but the memstick one does) and GPT 
> options of various kinds.
> 
> 
> Anyone successfully done this lately?
> 
> 
> /bz
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Received on Thu Jul 05 2018 - 12:51:44 UTC

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