Re: [expert] How do I copy a partition?
John Wolford wrote: 2. copy: # cp -a /usr /mnt Very good procedure. As an adder, I would like to highlight that the gentleman you were responding to mentioned the need for the -ax option. x keeps it within the same file system. For those that don't know what this means, suppose you have /usr as /dev/hda7 and /usr/local/dev/hda8. You want to move /usr to /dev/hda9. So you mount /dev/hda9 to /mnt/usr and begin the copy command. If you specify -x, you will copy all of /usr EXCEPT /usr/local/*. This may not be a big deal for some people, but on my personal system /usr/local is 2x the size of /usr by itself. -- tlyons at mandrakesoft dot com http://www.linux-mandrake.com/en
Re: [expert] How do I copy a partition?
Thanks, Todd :-) j --- Todd Lyons [EMAIL PROTECTED] wrote: John Wolford wrote: 2. copy: # cp -a /usr /mnt Very good procedure. As an adder, I would like to highlight that the gentleman you were responding to mentioned the need for the -ax option. x keeps it within the same file system. For those that don't know what this means, suppose you have /usr as /dev/hda7 and /usr/local/dev/hda8. You want to move /usr to /dev/hda9. So you mount /dev/hda9 to /mnt/usr and begin the copy command. If you specify -x, you will copy all of /usr EXCEPT /usr/local/*. This may not be a big deal for some people, but on my personal system /usr/local is 2x the size of /usr by itself. -- tlyons at mandrakesoft dot com http://www.linux-mandrake.com/en __ Do You Yahoo!? Yahoo! Auctions - buy the things you want at great prices http://auctions.yahoo.com/
Re: [expert] How do I copy a partition?
Check out the manpage on 'cpio' We use the '-pumdv' options over here (had to copy files in a partition myself the other day). On 2001.04.17 09:39 Phil wrote: Hello all, I originally made my / partition too large (only 2% is used) and now I want to shrink it because the /usr partition is full. My plan is to save the / partition, delete the partition and then create a new one. I have already saved the /usr directories. The question is, how do I copy just the contents of the partition without copying the entire Linux disk (cp -a would copy the entire disk)? -- Regards, Phil [EMAIL PROTECTED] -- Rial Juanhttp://nighty.ulyssis.org e-mail: [EMAIL PROTECTED] ICQ:20135549 Belgiumtel:++3289856533 cellular: ++32496737018 ulyssis system admininstrator http://www.ulyssis.org 1010011010 : Binary of the Beast
Re: [expert] How do I copy a partition?
My favorite method of copying partitions on systems on Linux is cp -ax (the -x switch tells cp to stay on the current filesystem) Eg., with / mounted as /, and the new one mounted as /newroot, you can say: cd / cp -ax . newroot Make sure to tell lilo and fstab about the change, of course. Also, you may want to look into GNU parted: http://www.gnu.org/software/parted/parted.html It can resize ext2 partitions, as long as the start of the partition stays fixed (so in your case, it would work for / , but you would need to handle /usr another way (if you want to change the size of /usr to fill what / had before, anyway) -pete On Tue, 17 Apr 2001, Phil wrote: Hello all, I originally made my / partition too large (only 2% is used) and now I want to shrink it because the /usr partition is full. My plan is to save the / partition, delete the partition and then create a new one. I have already saved the /usr directories. The question is, how do I copy just the contents of the partition without copying the entire Linux disk (cp -a would copy the entire disk)? -- Regards, Phil [EMAIL PROTECTED]
Re: [expert] How do I copy a partition?
Here's a old post that i've wound up re-posting a few times, and here i go again. I'm glad i saved it! Date: Thu, 25 Jan 2001 14:07:23 -0800 (PST) From: John Wolford [EMAIL PROTECTED] Subject: Summary: How to move /usr to another partition To: [EMAIL PROTECTED] Greetings again, Thanks for all the replies re: How to move /usr to another partition? It's nice to know that what i was working with SHOULD have worked, on principle. Here is a brief summary of the How to move /usr to another partition? thread. 1. Resize partition, using Partition Magic or some such thing. [this will only work if you actually have the appropriate space on the drive, of course] All of the following assume that /usr will be duplicated somehow onto /mnt/usr temporarily, then /etc/fstab will be updated to reflect the new location, reboot and presto, you are mounting the new /usr. 2. copy: # cp -a /usr /mnt 3. tarball: # tar cvf /mnt/usr.tar /usr # cd /mnt # tar xvfp usr.tar (Note that this method requires enough free space to hold not just mnt/usr but also /mnt/usr.tar) or # tar cf - /usr | ( cd /mnt ; tar xvfp - ) or # cd /mnt # tar cf - -C /usr | tar xvpf (Note that these last two methods of tarballing only require enough free space to hold /usr) Care must be taken to preserve relative links and file permissions if either 2 or 3 is to work. Soft links do not support spanning partitions or devices and will cause failures if this occurs. An aside: at the time that i was attempting this i was installing and re-installing on various drives on the same system. It MAY have been the case that i had a swap partition on the device that contained /usr and the device that contained the new /mnt/usr. If this were true, it could have caused some problems, i don't know. Thanks again, John --- [EMAIL PROTECTED] wrote: My favorite method of copying partitions on systems on Linux is cp -ax (the -x switch tells cp to stay on the current filesystem) Eg., with / mounted as /, and the new one mounted as /newroot, you can say: cd / cp -ax . newroot Make sure to tell lilo and fstab about the change, of course. Also, you may want to look into GNU parted: http://www.gnu.org/software/parted/parted.html It can resize ext2 partitions, as long as the start of the partition stays fixed (so in your case, it would work for / , but you would need to handle /usr another way (if you want to change the size of /usr to fill what / had before, anyway) -pete __ Do You Yahoo!? Yahoo! Auctions - buy the things you want at great prices http://auctions.yahoo.com/
RE: [expert] How do I copy a partition?
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Darek KUZARA Sent: Wednesday, April 18, 2001 3:06 AM To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: [expert] How do I copy a partition? A far simpler way is to CAT the drive... I.E. # cat /dev/hdb3 /dev/hdc3 -JMS --- The question is, how do I copy just the contents of the partition without copying the entire Linux disk (cp -a would copy the entire disk)? I would suggest dump (look man dump, man restore). e.g.: /usr/sbin/ufsdump 0ucf /some_dir/target_file /dev/hda5 -- /dev/hda5 - your root file system device -- /some_dir/target_file a backup file. I hope this helps. Dump prevents links and all necessary privileges. I would avoid using cp command. I hope this helps Darek
RE[2]: [expert] How do I copy a partition?
"Jose M. Sanchez" [EMAIL PROTECTED] wrote: A far simpler way is to CAT the drive... I.E. # cat /dev/hdb3 /dev/hdc3 -JMS --- Well, this is fine if the partitions are the same size, but I believe the question was when changing sizes... Also, dd is possibly better than cat, as you can pick up from where you left off if you want ;-) rc Rusty Carruth Email: [EMAIL PROTECTED] or [EMAIL PROTECTED] Voice: (480) 345-3621 SnailMail: Schlumberger ATE FAX: (480) 345-8793 7855 S. River Parkway, Suite 116 Ham: N7IKQ @ 146.82+,pl 162.2 Tempe, AZ 85284-1825 ICBM: 33 20' 44"N 111 53' 47"W
Re: RE[2]: [expert] How do I copy a partition?
I've tried to post this message already, did it make it? The delivery of my messages, both to and from this list, seems suspect at best. And from the error messages that i do get to see, it looks like the problem is on "mandrax"'s sideAnyway, here's a post that i made awhile ago on this topic, after asking a similar question and getting many responses. Date: Thu, 25 Jan 2001 14:07:23 -0800 (PST) From: John Wolford [EMAIL PROTECTED] Subject: Summary: How to move /usr to another partition To: [EMAIL PROTECTED] Greetings again, Thanks for all the replies re: How to move /usr to another partition? It's nice to know that what i was working with SHOULD have worked, on principle. Here is a brief summary of the "How to move /usr to another partition?" thread. 1. Resize partition, using Partition Magic or some such thing. [this will only work if you actually have the appropriate space on the drive, of course] All of the following assume that /usr will be duplicated somehow onto /mnt/usr temporarily, then /etc/fstab will be updated to reflect the new location, reboot and presto, you are mounting the new /usr. 2. copy: # cp -a /usr /mnt 3. tarball: # tar cvf /mnt/usr.tar /usr # cd /mnt # tar xvfp usr.tar (Note that this method requires enough free space to hold not just mnt/usr but also /mnt/usr.tar) or # tar cf - /usr | ( cd /mnt ; tar xvfp - ) or # cd /mnt # tar cf - -C /usr | tar xvpf (Note that these last two methods of tarballing only require enough free space to hold /usr) Care must be taken to preserve relative links and file permissions if either 2 or 3 is to work. Soft links do not support spanning partitions or devices and will cause failures if this occurs. An aside: at the time that i was attempting this i was installing and re-installing on various drives on the same system. It MAY have been the case that i had a swap partition on the device that contained /usr and the device that contained the new /mnt/usr. If this were true, it could have caused some problems, i don't know. Thanks again, John __ Do You Yahoo!? Yahoo! Auctions - buy the things you want at great prices http://auctions.yahoo.com/
Re: [expert] How do I copy a partition?
I originally made my "/" partition too large (only 2% is used) and now I want to shrink it because the /usr partition is full. My plan is to save the "/" partition, delete the partition and then create a new one. I have already saved the /usr directories. You may avoid all the hassle with the re-partitioning by moving any big directory from /usr to / and making symbolic link to it. This is the fastest workaround for your problem, e.g. # mv /usr/big_dir / # ln -s /big_dir /usr/big_dir In this case no further changes will be needed (i.e. resetting PATHs for installed software etc.) The question is, how do I copy just the contents of the partition without copying the entire Linux disk (cp -a would copy the entire disk)? I would suggest dump (look man dump, man restore). e.g.: /usr/sbin/ufsdump 0ucf /some_dir/target_file /dev/hda5 -- /dev/hda5 - your root file system device -- /some_dir/target_file a backup file. I hope this helps. Dump prevents links and all necessary privileges. I would avoid using cp command. I hope this helps Darek
[expert] How do I copy a partition?
Hello all, I originally made my "/" partition too large (only 2% is used) and now I want to shrink it because the /usr partition is full. My plan is to save the "/" partition, delete the partition and then create a new one. I have already saved the /usr directories. The question is, how do I copy just the contents of the partition without copying the entire Linux disk (cp -a would copy the entire disk)? -- Regards, Phil [EMAIL PROTECTED]
