The pax or tar command was using the original UNIX tar format when it encountered filename , whose name was too long to be represented in the archive using the original UNIX tar format. It switched to the USTAR format for the remainder of the archive.
The program continues.
This is an informational message. No corruption occurred to the archive or to filename , and no recovery action is required. To avoid this message, use the "-U" option for tar, to force the use of the USTAR format. For pax, do not use "-x" to specify the tar format; pax will use USTAR as the default.