Dear friend, I am running the linux system and have found some error messages in the file /var/log/messages May 4 09:04:36 cnsz030468 kernel: smb_request: result -104, setting invalid May 4 09:04:36 cnsz030468 kernel: smb_request: result -104, setting invalid May 4 09:04:36 cnsz030468 kernel: smb_retry: successful, new pid=1980, generation=27 May 4 09:04:36 cnsz030468 kernel: smb_request: result -104, setting invalid May 4 09:04:36 cnsz030468 kernel: smb_retry: successful, new pid=2034, generation=27 May 4 09:04:37 cnsz030468 kernel: smb_request: result -104, setting invalid May 4 09:04:37 cnsz030468 kernel: smb_retry: successful, new pid=2037, generation=27 May 4 09:04:37 cnsz030468 kernel: smb_retry: successful, new pid=2040, generation=27 May 4 09:22:54 cnsz030468 sshd(pam_unix)[26127]: session opened for user lbsop by (uid=0) May 4 09:22:55 cnsz030468 sshd(pam_unix)[26127]: session closed for user lbsop May 4 09:49:36 cnsz030468 kernel: smb_request: result -104, setting invalid May 4 09:49:36 cnsz030468 kernel: smb_request: result -104, setting invalid May 4 09:49:36 cnsz030468 kernel: smb_retry: successful, new pid=1980, generation=28 May 4 09:49:36 cnsz030468 kernel: smb_request: result -104, setting invalid May 4 09:49:36 cnsz030468 kernel: smb_retry: successful, new pid=2034, generation=28 May 4 09:49:36 cnsz030468 kernel: smb_request: result -104, setting invalid May 4 09:49:36 cnsz030468 kernel: smb_retry: successful, new pid=2037, generation=28 May 4 09:49:36 cnsz030468 kernel: smb_retry: successful, new pid=2040, generation=28 The content of /etc/redhat-release : Red Hat Linux Advanced Server release 2.1AS (Pensacola) The versions of kernel and samba are 2.4.9 and 2.2.1a respectively. Please help me find what causes the error messages? Is it serious for the system ? How do I solve the problem? Thanks a lot! Best Regards. quner