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Full Discussion: Dual Boot vs VM vs Wine?
Special Forums Windows & DOS: Issues & Discussions Dual Boot vs VM vs Wine? Post 302973400 by Neo on Tuesday 17th of May 2016 11:27:57 AM
Old 05-17-2016
I prefer booting off a different hard drive for each OS these days and currently use OSX and my primary unix desktop and boot off a micro SC card when I want another OS (and my backup OSX system is on a micro SD card) ... just seems easier to me... but VMWARE, etc are more sexy and I am sure better; but I just find having OS on different disks / media and booting as required easier for me....
 

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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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