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From: "Rodney W. Grimes" <freebsd-rwg@pdx.rh.CN85.dnsmgr.net>
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Subject: Re: gpart trouble
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To: bob prohaska <fbsd@www.zefox.net>
Date: Tue, 3 Jul 2018 21:23:43 -0700 (PDT)
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> 
> I want to add some swap partitions to the June 28th RPI3 snapshot image on microSD. 
> Growfs was suppressed, so the card has 12 GB of free space:
> 
> Enter full pathname of shell or RETURN for /bin/sh: 
> Cannot read termcap database;
> using dumb terminal settings.
> # mount -o rw /
> # gpart show mmcsd0
> =>      63  31116225  mmcsd0  MBR  (15G)
                               ^^^^^
>         63      2016          - free -  (1.0M)
>       2079    102312       1  fat32lba  [active]  (50M)
>     104391   5138469       2  freebsd  (2.5G)
>    5242860  25873428          - free -  (12G)
> 
> # gpart add -t freebsd-swap -s 1G mmcsd0
> gpart: Invalid argument
> # gpart add -t freebsd-swap -s 1G /dev/mmcsd0
> gpart: Invalid argument
> # gpart add -t freebsd-swap -s 1GB -l swap mmcsd0
> gpart: Invalid argument
> # 

I do not believe MBR supports "freebsd-swp" as a
partition type, we only have 0x165 as a FreeBSD
type.

I think you want to create a freebsd type at slice 3,
and inside that you want to create a freebsd-swp.

I am no good with gpart, but fdisk and bsdlabel can do this.

> 
> It seems to me this worked with an earlier snapshot, has something changed?
> 
> Thanks for reading!
> 
> bob prohaska
> 
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-- 
Rod Grimes                                                 rgrimes@freebsd.org