Fujitsu Eagle

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The Fujitsu M2351 "Eagle" was a hard disk drive with an SMD interface that was used on many servers in the mid-1980s. It offered an unformatted capacity of 470 Mbytes^[1] in 10-1/2 inches (6U) of 19-inch rack space, at a retail price of about US$ 10,000.

The data density, access speed, reliability, use of a standard interface, and price point combined to make it a very popular product used by many system manufacturers, such as Sun Microsystems.

[edit] Performance

The model 2351A incorporated eleven 14-inch platters rotating at 3,960 rpm, taking half a minute to spin up. One moving head accessed each data surface (20 total), one more head was dedicated to the servo mechanism. The model 2351AF added 60 fixed heads (20 surfaces × 3 cylinders) for access to a separate area of 1.7 Mbytes.

The Eagle achieved a data transfer rate of 1.8 Mbytes/second (a contemporary 5¼-inch PC disk would only deliver 0.4 Mbytes/s).

Power consumption (of the drive alone) was about 600 watts.