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Cannot open Data fork name I/O error (ErrorCode:-36)

Brad Alexander
  • Updated
 
  1. Product Version:
    2. Servosity Standard: All
    Servosity Pro: All
    OS: Mac OS X
  2. Problem Description:
    3. When performing a backup on Mac OS X, the following error message is received in the backup report:
    Backup Logs
     No.  Type  Timestamp  Backup Logs
    1 Info YYYY/MM/DD hh:mm Start [ Mac OS X (Test),Servosity Pro 5.x.x.x ]
    2 Info YYYY/MM/DD hh:mm Start running pre-commands
    3 ... ... ...
    *  Error  YYYY/MM/DD hh:mm [error] File "/Directory/File" Error="Cannot open Data fork name I/O error (ErrorCode:-36)"
  3. Cause:
    4. The message suggests that Servosity Pro / Servosity Standard is attempting to perform backup on system files such as the device file, FIFO file, and socket file.
  4. Resolution:
    5. To resolve the issue, please exclude all socket link or FIFO file from the backup set.

    To find out which file is Socket Link or FIFO file, you could use command such as "ls -F", which would display an equals sign ('=') after each socket, and a vertical bar ('|') after each FIFO file. For more information regarding this command, please refer to the following URL from Apple:

    http://developer.apple.com/documentation/Darwin/Reference/ManPages/man1/ls.1.html
  5. Also See:
    6. Even backup job that is performed by the scheduler service encounter the same problem?

    Answer) It is actually not necessary to backup Socket Link or FIFO file, as these files are created when the associated system starts. Even through the scheduler may have root access to files, these file may not be accessible due to their temporary nature.

    For more information regarding Socket Link or FIFO file, please refer to the following URL from Apple:

    http://lists.apple.com/archives/Darwin-userlevel/2008/Jan/msg00010.html