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Operating Systems BSD Bootable usb-stick, need help, sos Post 302992447 by 1in10 on Friday 24th of February 2017 11:15:43 PM
Old 02-25-2017
SOLVED at least it works for me.

I may should say this topic can be set as solved under the condition that it works for me.
It is about a usb-stick with an iso-image on it, Made on a linux machine putting a linux-distro on in, bootable device, to test the distro. I did not like it, disarded it, went back to gparted, formatting it as msdos fat32. This worked well, linux tells me, full space available.
The point is, this device goes from a linux to a BSD and rarely to a Windows machine. That is why I needed the msdos fat32 format. While linux says that everything is okay, BSD mumbles correctly, that there still is a boot partition on the drive.

Once again it works for me this way, not claiming the solution for encrypted partitions or slicing and dicing. So this is a particular solution, but probably helpful for others, who are not using encrypted slices or something just made for ufs. Although there is a slice1.

Code:
# clean the whole partition
gpart destroy -F da0

# set a mbr on the same
gpart create -s mbr da0

# fill the partition
gpart add -t \!12 da0

# format ins msdos style (fat32)
newfs_msdos -F32 /dev/da0s1

Resuming, some things take time. Damn thing.

This would or could work for make it bootable for ufs or BSD, I did not try yet

Code:
# clean it all
gpart destroy -F da0

# set a blank BSD partition 
gpart create -s bsd da0

# set the whole partition for usage of FFS(2)
gpart add -t freebsd-ufs da0

# format it (ffs(2))
newfs -U /dev/da0p1

This is an approach for flash drives

Code:
# Think twice about the name of your device
# clearing the MBR
dd if=/dev/zero of=/dev/da0 bs=2m count=0

# formatting it
newfs /dev/da0

# test test test
mount -t ufs /dev/da0 /mnt

# note da0 may, or may NOT be the correct device - check messages

 

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GPTBOOT(8)						    BSD System Manager's Manual 						GPTBOOT(8)

NAME
gptboot -- GPT bootcode for UFS on BIOS-based computers DESCRIPTION
gptboot is used on BIOS-based computers to boot from a UFS partition on a GPT-partitioned disk. gptboot is installed in a freebsd-boot par- tition with gpart(8). IMPLEMENTATION NOTES
The GPT standard allows a variable number of partitions, but gptboot only boots from tables with 128 partitions or less. PARTITION ATTRIBUTES
gptboot checks and manages several attributes of GPT UFS partitions. bootme Attempt to boot from this partition. If more than one partition has the bootme attribute set, gptboot will attempt to boot each one until successful. bootonce Attempt to boot from this partition only one time. Setting this attribute with gpart(8) automatically also sets the bootme attribute. Multiple partitions may have the bootonce and bootme attributes set. bootfailed The bootfailed attribute marks partitions that had the bootonce attribute set, but failed to boot. This attribute is managed by the system. See BOOTING and POST-BOOT ACTIONS below for details. USAGE
For normal usage, the user does not have to set or manage any of the partition attributes. gptboot will boot from the first UFS partition found. The bootonce attribute can be used for testing an upgraded operating system on an already-working computer. The existing system partition is left untouched, and the new version of the operating system to be tested is installed on another partition. The bootonce attribute is set on that new test partition. The next boot is attempted from the test partition. Success or failure will be shown in the system log files. After a successful boot of the test partition, a user script can check the logs and change the bootme attributes so the test partition becomes the new system partition. Because the bootonce attribute is cleared after an attempted boot, a failed boot will not leave the system attempting to boot from a partition that will never succeed. Instead, the system will boot from the older, known-working operating system that has not been modified. If the bootme attribute is set on any partitions, booting will be attempted from them first. If no partitions with bootme attributes are found, booting will be attempted from the first UFS partition found. BOOTING
gptboot first reads the partition table. All freebsd-ufs partitions with only the bootonce attribute set, indicating a failed boot, are set to bootfailed. gptboot then scans through all of the freebsd-ufs partitions. Boot behavior depends on the combination of bootme and bootonce attributes set on those partitions. bootonce + bootme Highest priority: booting is attempted from each of the freebsd-ufs partitions with both of these attributes. On each partition, the bootme attribute is removed and the boot attempted. bootme Middle priority: booting is attempted from each of the freebsd-ufs partitions with the bootme attribute. If neither bootonce nor bootme attributes are found on any partitions, booting is attempted from the first freebsd-ufs partition on the disk. POST-BOOT ACTIONS The startup script /etc/rc.d/gptboot checks the attributes of freebsd-ufs partitions on all GPT disks. Partitions with the bootfailed attribute generate a ``boot from X failed'' system log message. Partitions with only the bootonce attribute, indicating a partition that successfully booted, generate a ``boot from X succeeded'' system log message. The bootfailed attributes are cleared from all the partitions. The bootonce attribute is cleared from the partition that successfully booted. There is normally only one of these. FILES
/boot/gptboot bootcode binary /boot.config parameters for the boot blocks (optional) EXAMPLES
gptboot is installed in a freebsd-boot partition, usually the first partition on the disk. A ``protective MBR'' (see gpart(8)) is typically installed in combination with gptboot. Install gptboot on the ada0 drive: gpart bootcode -b /boot/pmbr -p /boot/gptboot -i 1 ada0 gptboot can also be installed without the PMBR: gpart bootcode -p /boot/gptboot -i 1 ada0 Set the bootme attribute for partition 2: gpart set -a bootme -i 2 ada0 Set the bootonce attribute for partition 2, automatically also setting the bootme attribute: gpart set -a bootonce -i 2 ada0 SEE ALSO
boot.config(5), rc.conf(5), boot(8), gpart(8) HISTORY
gptboot appeared in FreeBSD 7.1. AUTHORS
This manual page written by Warren Block <wblock@FreeBSD.org>. BSD
February 5, 2014 BSD
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