- Management and ordering of disk access requests is important:
- Huge speed gap between memory and disk.
- Disk throughput is extremely sensitive to.
- Request order
- Placement of data on the disk
File System Design.
- Disk scheduler must be aware of disk geometry.
- Disk management issues
- Physical: divide the blank slate into sectors identified by headers containing such information as sector number.
- Logical: marking bad blocks; partitioning and writing a blank directory on disk; installing file allocation tables, and other relevant information (file system initialization).
- RAIDs (Redundant Array of Inexpensive Disks): various levels, level 0 is disk striping).