at our organization we have a windows file server, which I use to store a large number of files. This file server is mounted using smbmount on 2 clusters.
Cluster A runs CentOS 4.8, and du version 5.2.1. Cluster B runs Ubuntu 8.04.4, and du version 6.10.
When I run the du cmd on Cluster A, for a particular folder I get
user@ClusterA:~/particular_dir$ du -h .... 637G .
However, when I run the du cmd on Cluster B, for the same folder I get
user@ClusterB:~/particular_dir$ du -h .... 1.1T .
Why is there such a large difference? Although different OS's and du versions, surely a file size is a file size.