Alejandro Lucero UPVLC alucero@disca.upv.es Ismael Ripoll UPVLC iripoll@disca.upv.es 2004 OCERA Consortium Real-Time, IDE driver, file system RTLinux does not support direct access to any kind of permanent massive storage systems, and in particular IDE hard disks. When a RTLinux thread has to storage data on the hard disk, it has to use the Linux services. The usual way of doing the transfer is by means of RTFifos: a rtl-task sends the data to Linux through an RTfifo, and then, a Linux process writes this data on the hard disk. The exitsting method to access hard disks is slow, unpredictable and inneficient, since it is executed by the Linux (background). Moreover, in some applications, like continuous media applications, it is required a certain degree of predictability. Therefore, for multimedia applications is more convenient that rtl-tasks have access to the hard drive, so that disk access can be done with real-time guarantees. To achieve this goal it is necessary to: 1) port the IDE driver to RTLinux, 2) implement a real-time filesystem. This component provides the porting of the Linux IDE driver to RTLinux, and a rtlfs filesystem.