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Troubleshooting and Diagnostics
7936 and 7937
Table 8-2. List of DERROR/TERROR's (6 of 25)
NUMBER
(hex/dec)
27/39
28/40
29/41
2A/42
2B/43
2C/44
8-20
INTER-
FACE
HP-IB
HP-IB
HP-IB
HP-IB
HP-IB
HP-IB
ERROR
DESCRIPTION
TOO MANY SERVO EVENTS.
(Fault).
Insufficient fault
recovery time exists or the
maximum number of allowable
hardware events has occurred
during recovery.
TOO MANY DISC EVENTS.
(F au 1 t) .
Insufficient fault
recovery time exists or the
maximum number of allowable
hardware events has occurred
during fault recovery.
NO INDEX PULSE. (Fault;
FRU
=
servo).
The once-
around, or Index Mark signal
could not be detected during a
format operation.
MODULE
ADDRESSING.
(Status
On ly) .
An illegal
volume or unit number was
specified for this device.
CHANNEL
INTERFACE
FA UL T. ( Fa u 1 t ;
F RU
=
controller).
A diagnostic
test of the host channel inter-
face circuit in the controller
failed.
PARAMETER
BOUNDS.
(Status On ly).
A parame-
ter, other than unit. volume, or
target address. is not allowed
for this device.
SUSPECf
ASSEMBLY
1. Servo PCA-A 1
2. Shipping Latch
3. Read/Write PCA-A2
4. HDA A3
1. Read/Write PCA-A2
2. Controller PCA-A6
3. HDA A3
l. Servo PCA-Ai
2. HDA A3
i. Host hard/software
2. Cabling
3. Controller PCA-A6
l. Controller PCA-A6
l. Host hard/software
2. Cabling
3. Controller PCA-A6
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