Technical information

Technician’s Handbook
144
5. Enter VOL DISABLE SYSUSER on the plane with the
faulty hard disk (inactive plane).
6. Power down the control node (see page 136).
7. Remove the cabinet sleeve.
Wear an anti-static wrist strap.
8. Remove the power cable from rear of the hard drive.
Disconnect the power cable from the rear of the RSD
drive directly below the hard disk drive being replaced.
In a redundant control node, it isn’t necessary to remove
the power cable from the RSD drive if you are replacing
disk drive B.
9. Disconnect the ribbon cable from the rear of the hard
disk drive.
10.From the front of the node, remove the two screws that
hold the drive carrier in place.
11.Gently slide the drive carrier from the node and remove
the four screws (two on each side) that hold the disk
drive in place.
12.Unpack the replacement disk drive. Ensure that the
address straps (A0, A1, A2) are removed and remove
the bus terminators from the drive.
13.Replace the hard disk drive.
14.Connect the power and ribbon cables.
15.Connect the external ac power cord(s) at the rear of the
node.
16.Set the power switch(es) on the rear of the node to “I”
(ON).
17. Enter VOL E SYSUSER to enable access to the sysuser
volume.