Hello Bryn, Friday, May 7, 2010, 2:41:55 PM, you wrote: > These small variations are most likely caused by the differences in > on-disk layout between ext3 and ext4. Ext4 is an extent based file > system as opposed to ext2/3 which use indirect block pointers to > describe the layout of a file's data blocks on disk. These indirect > blocks consume some of the available space in the file system (they are > part of the metadata overhead) meaning that storing a file in an ext3 > file system may consume more disk blocks than storing the same data on ext4. > Have a look at the ext4 wiki and kernelnewbies ext4 articles for more > information: > https://ext4.wiki.kernel.org/index.php/Main_Page > http://kernelnewbies.org/Ext4 > The exact numbers will depend on the size of files, fragmentation levels > and the allocation patterns exhibited by the use of the file system so > you can't say for e.g. ext4 is 14.159% more space efficient than ext3 as > a hard rule but results like the ones you are seeing are not surprising. > As other posters have commented, if you want to ensure that the > directory structure and file content is correct on the new volume you > should compare file lists or checksums to be confident all your data is > there. Wow! Thanks for the information! I compared the file lists as it was suggested a few posts earlier, and the lists seem to be identical. I also started comparing checksums, but that's a time-consuming process (the data I move is mostly my data files and a video archive, being close to 2TB large in total). Not sure if I really want to keep it running to the end... Basically I do believe now everything is Ok and my data is moved properly. Thanks a lot to everybody! -- Best regards, Andrew -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
