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Operating Systems Linux Red Hat How to RESIZE / root partition in RHEL5 (VM)? Post 302463934 by mark54g on Monday 18th of October 2010 10:13:26 PM
Old 10-18-2010
You have some other options:

What is your file system layout like?

Is the VM mapped to a physical block device or a file acting as one?

One thing to consider is that you can boot a recovery disk or something like a rescue CD image after presenting another disk or disk image and move /var /usr and /tmp to there. Those file systems tend to do well on their own partitions.

The way to go about this would be to present additional disk devices and then, from the system, modify the /etc/fstab file to point to the new devices. But, before you allow them to be mounted, I would suggest you rsync each directory to its new location. Once you have mounted the new location over the directory, the contents of those original directories will be inaccessible.

Last edited by mark54g; 10-18-2010 at 11:15 PM.. Reason: adding clarity
 

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RESIZE2FS(8)						      System Manager's Manual						      RESIZE2FS(8)

NAME
resize2fs - ext2 file system resizer SYNOPSIS
resize2fs [ -d debug-flags ] [ -f ] [ -F ] [ -p ] device [ size ] DESCRIPTION
The resize2fs program will resize ext2 file systems. It can be used to enlarge or shrink an ext2 file system located on device so that it will have size blocks. If the size parameter is not specified, it will default to the size of the partition. The size parameter may never be larger than the size of the partition. The resize2fs program does not manipulate the size of partitions. If you wish to enlarge a filesystem, you must first make sure you can expand the size of the underlying partition first. This can be done using fdisk(8) by deleting the partition and recreating it with a larger size. When recreating the partition, make sure you create it with the same starting disk cylinder as before! Otherwise, the resize operation will certainly not work, and you may lose your entire filesystem. If you wish to shrink an ext2 partition, first use resize2fs to shrink the size of filesystem. Then you may use fdisk(8) to shrink the size of the partition. When shrinking the size of the partition, make sure you do not make it smaller than the new size of the ext2 filesystem! OPTIONS
-d debug-flags Turns on various resize2fs debugging features, if they have been compiled into the binary. debug-flags should be computed by adding the numbers of the desired features from the following list: 1 - Print out all disk I/O 2 - Debug block relocations 8 - Debug inode relocations 16 - Debug moving the inode table -p Prints out a percentage completion bars for each resize2fs operation, so that the user can keep track of what the program is doing. -f Forces resize2fs to proceed with the filesystem resize operation, overriding some safety checks which resize2fs normally enforces. -F Flush the filesystem device's buffer caches before beginning. Only really useful for doing resize2fs time trials. AUTHOR
resize2fs was written by Theodore Ts'o <tytso@mit.edu>. COPYRIGHT
Resize2fs is Copyright 1998 by Theodore Ts'o and PowerQuest, Inc. All rights reserved. As of April, 2000 Resize2fs may be redistributed under the terms of the GPL. SEE ALSO
fdisk(8), e2fsck(8), mke2fs(8) E2fsprogs version 1.32 November 2002 RESIZE2FS(8)
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