Specifications

2 RA7x/SA7x Pocket Reference Guide
RA7x Characteristics
Table 2 lists the characteristics of RA70 and RA71-RA73
disk drives.
Table 2 RA7x Characteristics
Characteristics RA70 RA71 RA72 RA73
Total Number of Heads
12 15 21 22
Number of Data Heads
11 14 20 21
Number of Dedicated Servo Heads
1 1 1 1
Surfaces Containing Data and Embedded Servo
Information
11 14 20 21
Formatted Data Storage Capacity
280
MB
700
MB
1.0
GB
2.0
GB
Although RA70 and RA71-RA73 disk drives are very similar
in appearance, they differ structurally and electronically.
The RA70 shoe plate is not interchangeable with those for
the RA71-RA73 disk drives. None of the RA7x HDAs or
ECMs are interchangeable.