Type 
No. of Data Tracks 
Packing Density 
Error Correcting 
Overhead (related to 
electronics input and 
error correction) 
(Nom. Max. Data Rate 
(120IPS) 
Nom. Min. Data Rate 
(3.75IPS) 
Ext. Max. Data Rate 
(150 TPS)* 
Bit Error Rate 
7200 Ft. Tape: 
Capacity 
Playtime (84 Mbit/sec) 
9200 Fc. Tape: 
Capacity Playtime 
Archive Cost (9200 
Ft. Tape) 
Access Time (12 Min 
Passage, 84 Mbit/sec) 
Relative Mean Time 
Between Maintenance 
Relative Mean Time 
to Maintain 
28 Track 
26 
28,000 BPI 
NO 
3% 
84,8 Mbit/sec 
2.7 Mbit/sec 
106 Mbit/sec 
1076 
5.6 x 10(10) Bit 
11.1 Min. 
732500000 791 E 
14.1 Min 
3.7 USS/GBIT 
‘151 Sec 
0.8 
1.04 
80 
42 Track 
40 
25,000 BPI 
YES 
23% 
97.6 Mbit/sec 
3.0 Mbit/sec 
122 Mbit/sec 
1079 
6.4 x 10(10) 
12:7" Min. 
6.4 10010 
16.7 Min 
3,1 USS/GCBIT 
134 Sec 
1.02 
1.42 
Table 1: Comparison of HDDR Configuration 
Ti