Procedure 10.19: REMOVE OPERATIONAL MHD FROM SERVICE
OVERVIEW
When removing a target moving head disk (MHD) from service, this procedure verifies the integrity of the mate MHD
before removing the target MHD from service. This procedure makes use of the verify (
VFY
) command to assure
that the target MHD can be restored to duplex operation with the mate MHD.
PROCEDURE
1.
In this procedure MHD
x
is the target MHD to be removed from service, MHD
y
is the mate of the MHD to be
removed from service.
2.
At the master control center (MCC) verify the mate MHD. Type and enter:
VFY:MHD=y;
Where:
y
= mate of the MHD to be removed from service.
Response:
VFY MHD y COMPLETED
3.
At the disk to be removed from service, toggle the RST/ROS switch to
ROS
.
Response:
RQIP
LED lights.
OOS
LED lights.
RQIP
LED goes off without flashing.
RMV MHD x COMPLETED
Where:
x
= MHD number to be removed from service.
CAUTION:
If the number of the MHD in this step is not the correct MHD, this MHD must be returned to
service (toggle the RST/ROS to RST). After toggling the RST/ROS switch to RST, repeat
procedure for correct MHD.
Results:
Operational MHD removed from service.
4.
STOP. YOU HAVE COMPLETED THIS PROCEDURE.
235-105-210
October 1999
Copyright © 1999
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