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Old 11-26-2013, 03:37 PM   #1
Registered: Sep 2006
Location: Providence, Moka Mauritius
Distribution: Slackware, Gentoo, Lubuntu
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how to add bsd partitions on gpt

how to add bsd partitions on gpt ?

the freebsd-boot partition should be no larger than 512K due to boot code limitations.

so i can create one before 4096 sector
Number Start (sector) End (sector) Size Code Name
1 4096 2101247 1024.0 MiB 8300 MAXTOR_Boot
Partitions will be aligned on 2048-sector boundaries
changes to
Partitions will be aligned on 8-sector boundaries
if I create a 512K partition

I do not the change as it will break my scripts and make them complex
Old 12-04-2013, 09:53 PM   #2
Registered: Mar 2013
Location: Florida, USA
Distribution: Slackware, FreeBSD
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That may be a FreeBSD limitation. I think that the entire partition is read into memory by that tiny FreeBSD bootloader.

The problem is worked around very easily by simple use of math. Let FreeBSD create that default 64k freebsd-boot partition. When you create partitions later, be sure that a) the start sector % 2048 == 0, and that b) the partition size (sectors) of new partitions % 2048 == 0. IOW, if you get the start sector correct and specify your partition sizes in megabytes, all should be OK. [It doesn't hurt to double-check your numbers before placing file systems and/or RAID on the partitions.] It won't get gptfdisk/gdisk into working automatically with 2048-sector alignment, but at least the alignments will be the same.
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