Specifications

iv Contents
Figures
1 RA71/RA72 Capacity Indicator Switch 5
2 Drive Internal Error Log . . . . . . . . . . 7
3 Troubleshooting Flowchart . . . . . . . . 9
4 RA70 Exploded View . . . . . . . . . . . 11
5 RA71-RA73 Exploded View . . . . . . . 12
6 SA7x Enclosure Exploded View . . . . 14
7 RA70 Electronics—Simplified Block
Diagram . . . . . . . . . . . . . . . . . . . . 15
8 RA71-RA73 Electronics—Simplified
Block Diagram . . . . . . . . . . . . . . . . 15
9 RA7x Drive Status . . . . . . . . . . . . . 20
10 RA7x Response Opcode (Byte 1) . . . 21
11 RA7x Lower Unit (Byte 2) and High
Unit and Subunit Mask (Byte 3) . . . . 21
12 RA7x Request Byte (Byte 4) . . . . . . . 22
13 RA7x Mode Byte (Byte 5) . . . . . . . . 23
14 RA7x Error Byte (Byte 6) . . . . . . . . . 24
15 RA7x Controller Byte (Byte 7) and
Retry Count (Byte 8) . . . . . . . . . . . . 25
16 RA7x Previous Command Opcode
(Byte 9) . . . . . . . . . . . . . . . . . . . . 26
17 RA7x Drive State Byte (Byte 10) . . . . 27
18 RA7x Current Cylinder Address (Bytes
11 and 12) . . . . . . . . . . . . . . . . . . 27
19 RA7x Current Group (Byte 13) . . . . . 28
20 RA7x Drive Error Code (Byte 14) . . . . 28
21 RA70 OCP Code Byte; RA71-RA73
Fault Number Byte (Byte 15) . . . . . . 28
22 SA7x OCP . . . . . . . . . . . . . . . . . . 29