Problem definition: I transferred a tar.gz file from a Linux machine to a Windows partition.The Windows partition has mounted with the Linux server as cifs. OS : Red Hat Enterprise Linux Server release 5 Symptom: After the copy process is successful, doing an integrity check with gunzip -t and the process get the following error: gunzip -t Backup-28--Jun--2011--Tuesday.tar.gz gunzip: Backup-28--Jun--2011--Tuesday.tar.gz: invalid compressed data--format violated And further tried to untar (tar -xvzf) and the process as well is failed.