IBM DCS3860, Installation, User'S, And Maintenance Manual

Page: 114 / 204

Attention: To turn off all power to the storage system, you must turn off
both power-supply switches and disconnect both power cords. Use the
procedure in step 5 for the proper shutdown sequence.
5.
Turn off power to each device based on the following shutdown sequence:
a. Turn off power to the host before you turn off power to the storage
system. If the host must stay powered on to support an existing network,
see the operating system documentation for information about
disconnecting the storage system logical drives from the host before the
storage system is powered off.
b. Turn off power to the DCS3860 storage system before you power off the
EXP3800 expansion enclosure. Turn off both power supply switches on the
back of the storage system.
c.
Turn off power to other supporting devices (for example, management
stations, Fibre Channel switches, or Ethernet switches).
6. Use the procedures in “Replacing hot-swap hard disk drives” on page 92 to
remove the DDMs that you want to replace. Use the procedures in “Installing
hot-swap hard disk drives” on page 92 to install the new DDMs into the
DCS3860.
7. After you install all new DDMs, follow the system documentation for the
hardware devices that you intend to power on, and determine the proper
startup sequence. Use the following power-on sequence, where applicable:
a. Turn on the power to the supporting devices (for example, Ethernet
switches and management stations) before you turn off power to the
storage system.
b. You must turn on the expansion enclosures before the storage system. The
controllers might not recognize the correct configuration if the drives are
powered up after the storage system.
c. Turn on the power to the storage system; then restart or turn on the power
to the host.
8. Turn on the power to each device, based on the power-on sequence in step 8.
To turn on power to the DCS3860 storage system and expansion enclosures,
turn on the power-supply switches on the back of the enclosures. You must
turn on both power-supply switches to take advantage of the redundant
power supplies.
9. Check the green Drive activity LEDs and the amber Drive fault LEDs above
the new drive FRUs.
Ensure that the Drive activity LEDs are on and the Drive fault LEDs are off.
Note: The Drive fault LEDs might flash intermittently while the DDMs spin
up. If the Drive activity LED is off, the DDM FRU might not be installed
correctly. Remove the DDM FRU, wait for 30 seconds, and then reinstall it. If
the Drive fault LED stays on or the Drive activity LED stays off, the new
DDM might be faulty. See the IBM DS Storage Manager software for problem
determination.
10. Use the IBM DS Storage Manager software to configure the new DDMs. See
the IBM DS Storage Manager software online Help for detailed instructions.
11. Restore the data from backup to all the DDMs.
Replacing the drives one at a time
You cannot use this procedure on RAID 0 logical drives (use the procedure in
“Replacing all DDMs at the same time” on page 95).
96
IBM System Storage DCS3860 Storage System: Installation, User's, and Maintenance Guide