The IBM nine-track tapes that became the industry standard for storage for three decades had several sizes , the most common being 2400 feet. The high density version stored data at 1600 bits/inch/track. If the whole tape (not including the parity track) could be used for data storage , how much raw data could one of these tapes hold?
Round to the nearest MB using decimal MB not binary MB
1 foot = 12 inches
2400/9=266.66 feet per track
1 track excluding, remaining 8 track =2400 - 266.66 = 2133.33 feet
so, space available to store data = 2133.33 feet
now, 2133.33 feet = 25600 inches
total data that can be stored = 25600 * 1600 = 40960000 bits
= 46080000/8 = 5120000 Bytes
= 5120000/1000000 = 5.12 MB = 5 MB (approx.)
The IBM nine-track tapes that became the industry standard for storage for three decades had several...