The Marathon 1680 supports any translation geometry that satisfies

all

of the following conditions:

•Sectors per track ≤ 63
•Read/write heads ≤ 16
•(Sectors per track) ×

(read/write heads)

× (cylinders) ≤ 3,282,048
1.2 Physical organization
Marathon 2250 Marathon 1680
Read/Write heads 10 8
Discs 5 4
1.3 Recording and interface tec hn ology
Interface ATA
Recording method 8/ 9
Recording density (bits/inch) 120,000
Track density (tracks/inch) 5,555
Areal density (Mbits/inch2) 666
Spindle speed (RPM)
( ± 0.5%) 4,508
Internal data-transfer rate
(Mbits per sec max—ZBR) 60.8
I/O data-transfer rate
(Mbytes per sec max) 16.6 (PIO mode 4 with IORDY)
16.6 (multiword DMA mode 2)
Interleave 1:1
Cache buffer (Kbytes) 103
6 Marathon 2250 and M arathon 1680 Product Manual