
Hardware maintenance 16-11
Removing and replacing the disk unit in a shadowed EC 11
Standard 1.0 Option 11 EC Installation and Maintenance Guide November 1999
12 Enable disk shadowing.
Note: The node can remain with the disk with the
power supply as SCSI address = 0 and the disk
without the power supply as SCSI address = 2.
However, for consistency and to avoid confusion, it is
recommended that you switch the SCSI IDs so that
the primary disk is SCSI address = 0 (without the
power supply) and the secondary disk is SCSI
address = 2 (with the power supply). To do this,
perform the remaining steps in this procedure.
13 When the disks are synchronized and shadowing is
enabled, courtesy down the system.
14 Power down the system.
15 Remove the disks. Change the SCSI address of the
disk with the power supply to 2, and the disk without
the power supply to 0.
16 Install the disk cover plates by sliding them between
the disks and the disk drive plates so that the front of
each disk is covered.
17 Reinstall the disks, power up the system, and start
Meridian Mail.
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