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Service Information
7942 and 7946
Oct
Dec
220
144
221
145
222
146
223
147
224
148
225
149
226
150
227
151
230
152
236
158
237
159
240
160
241
161
242
162
243
163
244
164
245
165
246
166
247
167
250
168
252
170
253
1 71
255
173
256
174
257
175
266
182
300
192
4-26
Hex
90
91
92
93
94
95
96
97
98
9E
9F
AO
At
A2
A3
A4
AS
A6
A7
A8
AA
AB
AD
AE
AF
B6
CO
Table 4-4. Fault Code List (Continued)
Unit Faults
Read spare table timeout.
Format - Sector count register not zero.
Format - DMA transfer count not valid.
Format - timeout.
Infinite loop detected in logical address mapping -
Spare tables lost.
Spare tables read failure
Store spare tables failure.
Read serial number failure.
Write serial number failure.
Track sparing failed - lost spare tables.
Zeroing of spare tracks operation failed in Deallocate Spares.
Seek to deallocated spare failed in Deallocate Spares.
Copy of track to be spared has failed.
Write of spare track failed, spare allocated but not assigned.
Track Sparing cannot obtain resources.
Track Sparing failed while writing spare tables to disc.
Verify failed on second spare track.
Seek failure during verify of spare tracks.
Disc controller IC error bit set but no error found.
Write fault during operation other than write
(Write current present in head.)
Disc controller IC overran the DMA (IC register must have
glitched).
Seek Complete will not come true after a
write fault.
ID-not found on scan ID command. Restore performed.
Verify position operation reveals drive is on the wrong head.
Verify position operation reveals drive is on the wrong cylinder.
Write retries on this sector exhausted - due to write fault.
Unit fault - logs unreadable.
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