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Secondary Storage Devices
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access method access mode address space algorithm allocated application program assume average search length B-tree balanced merge sort binary search tree block pointer blocking factor bytes CARDS CARDSAREA CHECKSAREA contains control interval cylinder data area data block DATA DATA data set data transfer deleted device disk equal equation FILE CHECKS file organization FILE RECORD ENV(CONSECUTIVE file system File_2 filename fileptr flag format fseek hash file hashing function Hence illustrates index blocks index set indicates inode input buffer inserted integer leaf node logical READ logical record m-way MOVEAREA NAME CHAR(20 NBLK Notice number of accesses number of blocks operation OS/MVS output buffer overflow block overflow records performed physical block polyphase merge primary block primary key printf processing random access READ FILE record with key region retrieval Retrieve_One secondary storage sequential access stored structure of Figure Table target record tion total number track updated variable VSAM WRITE