Date: Mon, 10 Aug 1998 07:39:33 -0400 (EDT) From: Spidey <beaupran@JSP.UMontreal.CA> To: "Jose M. Megias Sanchez" <jms@caja-granada.es> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: extend file system Message-ID: <Pine.BSF.3.96.980810070003.343A-100000@outpost.nada.org> In-Reply-To: <01bdc436$5cc60000$00008282@jms>
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I really got to finish the paper I have to write on this... Please, consider that I take ***no responsability*** to any damage this procedure can do on your system. I only engage myself into helping you to the best of my knowledge. I wish that someone corrects me if I make any mistake. Don't start the procedure in a hurry. Maybe you should wait for a second advice, such as Julian Elisher or Greg Lehey... On Mon, 10 Aug 1998, Jose M. Megias Sanchez wrote: > Hello, I have a little problem. My fylesystem /usr is full and I would like > to extend its size, in other unix (hp-ux) its too easy with the command > extendfs but FreeBSD don't has it. Indeed. It would be a quite great adding, if you ask me... > I have the following fylesystems: > mulhacen2# df -k > Filesystem 1K-blocks Used Avail Capacity Mounted on > /dev/sd0a 297423 18048 255582 7% / > /dev/sd0s2h 2244926 17 2065315 0% /home > /dev/sd0s2e 248175 3362 224959 1% /tmp > /dev/sd0s2f 496367 467706 -11048 102% /usr > /dev/sd0s2g 695311 2094 637593 0% /var > procfs 4 4 0 100% /proc > /dev/wcd0c 600108 600108 0 100% /dist > > I would like extend /usr with 100 Mb catching the space from /home (by > the moment not used). I have a backup of all fylesystems obtained with DUMP, > How can I do now to extend /usr?, newfs -s maybe?. Regards. i really don't think it is a solution. I did the thing. And it was freespace that I was adding at the end of my /usr... All the stuff is on disklabel. 1- Make sure your backups are OK... I don't know DUMP, but I know that it is a risky procedure. 2- Check disklabel -r /dev/sd0s2. (you have 2.2.5R or lower uh?, or else your sd0a would be sd0s2a, I think...:). With disklabel, you'll see the size and offset of your partitions. One problem is that your /var is after your /usr, which means we got to make some room, which implies that you BACKUP /var, because it's gonna be *deleted*. 'En resume': /var, /usr and /home will be deleted. Back them up. Double check to see if you have the necessary software to restore these on **other** partitions than these 3!!! Then what you will do is, in single-user (not necessarly needed, but take no chaces...), edit the disklabel with: disklabel -r -e /dev/sd0s2 You may need to mount certain filesystems, 'cause disklabel uses a text editor (vi generally), and files in /tmp... In your case this shouldn't be a problem, 'cause /tmp is on a seperate partition. However, *** make sure you have vi under your path!!! **** There is the 'fun part'... You edit the sizes and offsets as your convenience. As I understood, you don't need to change the /var size, so just add the size you're adding to /usr to the *offset* of /var. You may also like to put /var *before* /usr, if you ever need (plan?) to do this again, but this may imply things that I am noot aware of (fstab changes etc...) You'll also have to add the adding size to the offset of /home, and substract it from the size of /home (to your calculators!!!! we don't want any mistake here!!!) Then: newfs /dev/sd0s2f newfs /dev/sd0s2g newfs /dev/sd0s2h This should give you the 3 new filesystems, empty, ready to be restored! There is only oone thing I would be worried about. The -11000 blocks "available"... I'm not sure as of how to handle this... So, briefly this goes on like: 1- Backup /var /usr and /home. 2- Install necessary software on a 'neutral zone', let's say /. a- vi or another editor that will be in $EDITOR b- disklabel, newfs (I think it's already on /bin, but...) c- you might also like a fixit and install floppies, if something goes wrong. 3- Go single-user, and mount necessary partitions. I don't think it would be a very good idea to mount /var, /home or /usr... Try to avoid it. 4- disklabel -r -e /dev/sd0s2 5- Edit to it your needs. [optionnal]- Swap /var and /usr 6- Wish. 7- newfs /home , /var and /usr (don't use this syntax! :) 8- Restore the partitions. 9- Modify /etc/fstab if you swap /var and /usr. 10- Be happy. 11- Quickly fill up /usr 12- 'GOTO 1-' :) Give me feedback! Best luck! Spidey How 'bout a little ride through your own world? http://www.JSP.UMontreal.CA/~beaupran/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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