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■scheduler
The scheduler sorts and schedules disk I/O, manages bit pump buffers, performs admission control, and schedules output driver activity.
■bit pump
The bit pump is responsible for allocating internal buffering and efficiently transferring data between the disk and the output drivers using the internal buffers. It is responsible for
■disk driver
The output driver is responsible for
See Chapter 7 for a description of the format of output data.
■output driver
The disk driver is responsible for efficiently transferring disk data to the fixed internal buffers. It consists of a SCSI disk driver and a modified SCSI host adapter driver.
The MFS components listed above are illustrated in FIGURE
Media File System
Layout Manager
Scheduler
Bit Pump
Buffers
Disk
Driver
Output
Driver
FIGURE 1-3 Media File System Components
1.3.2Media Stream Manager
The MSM controls the video streams stored in the MFS. The MSM implements a set of procedures that interact with the MFS to allow you to stop, start, pause, and resume video bit streams. A central notion of the MSM is the playlist, from which titles can be played on a
Chapter 1 Introduction