After the previous messages are entered, a
REPT MHD
output message will be printed showing the paired MHDs
on their corresponding MDCT forms with the swapped MHDs indicated by an ``
*
''. This output message will repeat
approximately every hour as long as the configuration is nonstandard. A manual request to produce this information
can be entered by using the
OP:MHD:CFG
input message.
The MCC Display Page
123
/
125
can be used to check the status of the MHDs. If the MHD swap involves an MHD
that is marked essential (such as one of the primary disk pair), Page
123
will reflect these MHDs going through the
unequipped and growth states as the swap changes the essential bit.
When the swap(s) is done and the MHDs have been replaced or repaired, a single input message can put the
system back into the standard configuration. At the MCC, type and enter:
SW:MHD=ALL:STANDARD;
If this request cannot run to completion (because one of the swapped MHDs is not OOS, for example), the input
message can be repeated after corrective action has been taken.
Refer to 235-600-700,
Input Message Manual
, for more information concerning the previous referenced input
messages.
9.2.8 AUTO DISK CONFIGURATION
9.2.8.1 General
The
auto spare disk
feature is part of software releases 5E9 and later. Whenever the feature detects an MHD that
has been removed from service, except by a manual input command, it starts a timer. When the timer expires in
about 30 minutes, the feature again looks at the MHD. If the MHD is still out of service, the feature is triggered.
Upon being triggered, the feature checks that all the MHDs are presently configured in their normal state and that
the spare MHD (14 is the spare for the DFC 0 MHDs and 15 is the spare for the DFC 1 MHDs) is active. It then
verifies that the defective MHD's mate (for example, MHD 0 and 1 are mated, as are 2 and 3, etc.) can read every
track on it. Next, the feature removes the spare MHD from service.
The feature then uses ECD recent change (RCVECD) to configure the ECD to mate the spare MHD with the
(defective MHD's) mate MHD. The defective MHD is left unmated. For example, if the defective MHD was 0, then
MHDs 14 and 1 would be mated and MHD 0 would be left unmated. Finally, the spare MHD will be restored duplex
with the mate MHD.
At some later time, when the defective MHD has been repaired, the user enters a command or poke to normalize
the configuration. The feature first verifies that the mate MHD can read all tracks. It then removes from service the
spare MHD and the (previously) defective MHD. Next, the ECD is restored to the normal configuration. Finally, both
MHDs are restored to service and the feature is ready to be retriggered.
If any step in the initial (before the defective MHD is repaired) procedures fails, then a major alarm is generated and
an error report is printed on the ROP. The alarm repeats about every 15 minutes until (1) the defective MHD is
restored to service, (2) any manual configuration of any MHD completes successfully, or (3) the feature is inhibited
for the entire office.
9.2.8.2 User Interface
9.2.8.2.1 General
The automatic MHD configuration feature interfaces to the user by display pages and input/output messages. The
following sections give an overview of these messages and display pages.
9.2.8.2.2 Input Messages
235-105-210
October 1999
Copyright © 1999
Page 9
Summary of Contents for 5ESS-2000
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Page 799: ...Figure 11 36 3 1 Cleaning Points 235 105 210 October 1999 Copyright 1999 Page 7 ...
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Page 1008: ...Figure 11 55 1 CTSNS DIP Switch Settings 235 105 210 October 1999 Copyright 1999 Page 2 ...
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Page 1289: ...Figure 15 17 2 AMATPS Data Link 235 105 210 October 1999 Copyright 1999 Page 2 ...
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Page 1360: ...Figure 15 47 2 Typical SCANS III Link Diagram 235 105 210 October 1999 Copyright 1999 Page 2 ...
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Page 1421: ...Table 1 1 O M Checklist 235 105 210 October 1999 Copyright 1999 Page 3 ...