Date: Mon, 28 Sep 2015 20:36:08 -0600 (MDT) From: Warren Block <wblock@wonkity.com> To: Polytropon <freebsd@edvax.de> Cc: "William A. Mahaffey III" <wam@hiwaay.net>, FreeBSD Questions !!!! <freebsd-questions@freebsd.org> Subject: Re: dd question Message-ID: <alpine.BSF.2.20.1509282031010.14802@wonkity.com> In-Reply-To: <20150928110851.593abd75.freebsd@edvax.de> References: <5606A4FF.4090105@hiwaay.net> <CA%2BtpaK3UOEfKSfSjbdcH%2BR2jaU9=XVBEg%2B%2Bjn5VCbiiUkLF_Tg@mail.gmail.com> <56073915.6030707@hiwaay.net> <20150927131036.c6b2d9ce.freebsd@edvax.de> <alpine.BSF.2.20.1509270540450.40168@wonkity.com> <5607E84D.1050803@hiwaay.net> <20150927155354.7dab526a.freebsd@edvax.de> <5607F676.10307@hiwaay.net> <20150927160604.f1e1c21d.freebsd@edvax.de> <5607FA6E.5040600@hiwaay.net> <alpine.BSF.2.20.1509271857480.36906@wonkity.com> <20150928110851.593abd75.freebsd@edvax.de>
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On Mon, 28 Sep 2015, Polytropon wrote: > On Sun, 27 Sep 2015 19:00:47 -0600 (MDT), Warren Block wrote: >> On Sun, 27 Sep 2015, William A. Mahaffey III wrote: >> >>> If I use disklabel to add a 'd' slice, will that mess up what is already >>> there ? What is the syntax for that, I don't see it in the disklabel/bsdlabel >>> man page ? The man page for disklabel/bsdlabel shows a way to initialize a >>> whole disk using 'fdisk -BI <dev>' & implies that this will create a 'da0s1' >>> slice in the process. However it will also wipe out what is already there. If >>> I do that, can I then copy the img-file contents in some way ? Thanks & TIA >>> :-) .... >> >> Please stop using fdisk and bsdlabel. gpart(8) does everything they do >> and is easier to use. > > But it works so nicely, especially for all the many > non-standard settings! :-) > > Sure, gpart (and in a related context, GPT) is the > way to go for 99% of use cases. Somehow I still like > the ability to ditch partitioning at all and just > newfs a device, or make a "one big bootable partition" > with two bsdlabel commands. This knowledge will soon > go down the drain, together with other "old craft" > of UNIX skills many decades old. :-) You can still put a filesystem on a raw device, and gpart will happily create bsdlabels. It is a general-purpose partitioning tool, and can write at least half a dozen partitioning schemes including bsdlabel and MBR. It uses the same type of commands regardless of the partitioning scheme. > As the installation image is best dealt with bsdlabel, > resizing 'c' and adding a 'd' partition should be possible, > with the commands run through a mdconfig'ured virtual > node connected to the image file. As I said, I haven't > tried this, but it's probably possible. In worst case, > it's a "try & fail" issue. :-) Try it with gpart. Consider it a test to see if gpart really is a replacement for bsdlabel.
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