Summary

Camera location	37° 24′ 50.4″ N, 122° 04′ 39.6″ W	View this and other nearby images on: OpenStreetMap	37.414000; -122.077667

IBM 2315 Cartridge storage capacity

Both the IBM 1130 and the IBM System/360 Model 44 had an integrated disk drive, the IBM 2310. The IBM 2310's disk cartridge is the IBM 2315.
The internal formatting of the 2315 on each system was different, and the 360/44 could store 1,171,200 characters ^[1][2], whereas the 1130 stored 1,024,00 characters ^{[3] [4]}

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1. ↑ http://bitsavers.trailing-edge.com/pdf/ibm/360/funcChar/A22-6875-5_360-44_funcChar.pdf, page 5. As explained on page 11, each of the 16 sectors in a track hold 366 bytes. 16 x 366 x 200 tracks = 1,171,200 bytes.
2. ↑ Contrary to the 1,088,000 "characters" (8 data bits, 1 parity bit) it says about the Integrated Single Disk Storage Drive at https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP2044.html, the IBM 2315 Cartridge used by the IBM 2310 disk drive in the IBM System 360 Model 44, the correct capacity, as cited in the Functional Characteristics manual, is 1,171,200.
3. ↑ https://www-03.ibm.com/ibm/history/exhibits/1130/1130_technical.html By contrast, for the IBM 1130 the IBM 2315 Cartridge there are 8 sectors of 640 bytes (320 16-bit words) = 1,024,000 bytes.
4. ↑ Both situations involve 200 tracks/cylinders of data. (1130: 512,000 words / 1,024,000 bytes; 360/44: 366 x 16 * 200 = 1,171,200 bytes) HENCE, 1,088,000 is incorrect for the 360/44.