Date: Mon, 28 May 2007 10:53:26 -0400 From: Jerry McAllister <jerrymc@msu.edu> To: Jeffrey Goldberg <jeffrey@goldmark.org> Cc: questions@freebsd.org Subject: Re: How to find disk slice layout Message-ID: <20070528145326.GC24417@gizmo.acns.msu.edu> In-Reply-To: <4532A9C5-9AA1-42B6-BC29-1FCB98EBC054@goldmark.org> References: <4532A9C5-9AA1-42B6-BC29-1FCB98EBC054@goldmark.org>
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On Sun, May 27, 2007 at 10:34:52PM -0500, Jeffrey Goldberg wrote: > For backup reasons I would like to get a statement of the slices on a > disk. fdisk only tells me about classic partitions. Is there some > command I can use to remind me of how I sliced that partition? I am guessing that you have your terminology scrambled, so lets straighten that first. The primary divisions that FreeBSD recognizes and fdisk handles are slices. there can be up to 4 slices (named 1-4) on a disk. MS- calls these primary partitions. Within each slice, FreeBSD can create partitions named a-h, with 'c' reserved to give information about the whole slice. The bsdlabel(8) utility takes care of this. Just type bsdlabel adNsX replacing the 'N' and 'X' with appropriate drive and slice identifiers eg first drive and first slice would be: bsdlabel ad0s1 If you are dual-booted and FreeBSD is second (a common occurance then it might be 'bsdlabel ad0s2' Note you do not back up the swap partition which is normally 'b' and don't do anything to the 'c' partition which is there only to describe the slice to the system and is not a true partition. You can probably skip backing up your /tmp also. > > The best (and a poor approximation it is) I can come up with is to > use df to tell me the sizes of my non-swap slices. There must be a > simple way to do this. Anyway, using 'df -k' or maybe 'df -m' is a good way to deal with planning backups because in almost all cases you will only back up partitions that you have mounted. After all, they are the only ones you are actively using and housing data to back up. In addition, when you do a backup, the relevant size is the amount used, or possibly the usable capacity as given by df rather than the size as divided. ////jerry > > -j > > -- > Jeffrey Goldberg http://www.goldmark.org/jeff/ > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"
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