A shared file system may be updated by a non-native operating system writing information to a change file, while a native operating system is in a suspend or hibernation mode; after writing, the non-native operating system is placed in a suspend or hibernation mode and the native system activates and then retrieves the updated information from the change file and writes the updated information to a shared file system. The native operating system returns to a suspend or hibernate state before the non-native operating resumes operation. The updated information may be written as provided by the non-native operating system, or further updated by the native operating system before being written to the shared file system. The change file is created by the native operating system, and may be a reserved portion of the shared file system or may be a separate portion of non-volatile memory. The native and non-native operating systems operate both concurrently and independent of one another; thereby, preventing conflicts during file system updating.