Cylinder 0 Track 0 Record Number
Description
Number of Bytes All Cx'inders Except 0 Record Number
Description
Number of Bytes Record
Description
Number of Bytes
Figure 3-14. RO R1 R2 DD Check-
point
8 24 4096 RO R1
R3
Keyl Label , I I I 4 80 R2
R4 R5
Allocation :Format
Byte Key: 4
Map I Label , 1024 44 96
R3 DDEJDEJD 8 4096 50 4096 50 4096 • • • RO R55 R56 R57
DDEJDEJD
8 4096 50 4096 50 4096 3330 Series Record Layout
76 IBM VM/370 Service Routines program Logic
R6 RF3
'Format I LJ Key, 5 I I I Label I : I 44 96 4096 I

Cylinder 0 Track 0 Record number I Description
Number of Bytes I I All Cylinders Except 0 I Track 0 Record I Description
Number of Bytes I Tr.ock 1 I Reco,d I Description I Numb .. of Bytes
Figure 3-15. RO R1 R2 R3 R4 R5 R6 RF3 I II'PL II II Kev I Labell I Allocation I I I 1 Formatl I 1 page Check- I I Forma II point II! I I Keyl 4 I Label ! Label I 1 I I , I I I , I IKevj 5 II I I I I' 8 24 4096 4 80 1024 44 96 RO R1 R2 R3 uutJutJu 8 4096 50 • • • 4096 50 4096 RO R22 R23 R24 8 4096 50 4096 50 4096 2305 Models 1 and 2 Record Layout
44 96 4096 I II Chapter 3. The Format Service Program 77