#define NCPU 8 // maximum number of CPUs
#define NOFILE 16 // open files per process
#define NFILE 100 // open files per system
-#define NREQUEST 100 // outstanding disk requests
#define NBUF 10 // size of disk block cache
+#define NREQUEST NBUF // outstanding disk requests
#define NINODE 100 // maximum number of active i-nodes
#define NDEV 10 // maximum major device number
#define ROOTDEV 1 // device number of file system root disk