RAID-4 (Block Interleave Data Striping with one Parity Disk)
+----------+
| Disk |
|Controller|
+----+-----+
+---------+---------+---------+----------+
| | | | |
+-----+ +--+--+ +--+--+ +--+--+ +---+--+
|xxxxx| |xxxxx| |xxxxx| |xxxxx| |Parity| Block 0
|-----| |-----| |-----| |-----| |------|
|yyyyy| |yyyyy| |yyyyy| |yyyyy| |Parity|
|-----| |-----| |-----| |-----| |------|
| | | | | | | | | | Block n
+-----+ +-----+ +-----+ +-----+ +------+
Disk 1 Disk 2 Disk 3 Disk 4 Disk 5
xxxxx and yyyyy = Blocks belonging to long files