On 19.3.2012 10:16, John R Pierce wrote: > On 03/19/12 2:14 AM, Peter Kjellström wrote: >> I can also add that I've successfully managed to shrink ext3 before but a >> verified backup is probably good advice.. > > does resize2fs relocate blocks or is it restricted to shrinking only to > last high water block in use ? I found this in resize/resize2fs.c.unused_group_blocks /* * Resizing a filesystem consists of the following phases: * * 1. Adjust superblock and write out new parts of the inode * table * 2. Determine blocks which need to be relocated, and copy the * contents of blocks from their old locations to the new ones. * 3. Scan the inode table, doing the following: * a. If blocks have been moved, update the block * pointers in the inodes and indirect blocks to * point at the new block locations. * b. If parts of the inode table need to be evacuated, * copy inodes from their old locations to their * new ones. * c. If (b) needs to be done, note which blocks contain * directory information, since we will need to * update the directory information. * 4. Update the directory blocks with the new inode locations. * 5. Move the inode tables, if necessary. */ -- Kind Regards, Markus Falb -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 307 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos/attachments/20120320/1fa5bf1d/attachment-0004.sig>