CAUTION:
The power control button on the device and the power switch on the power
supply do not turn off the electrical current supplied to the device. The device
also might have more than one power cord. To remove all electrical current from
the device, ensure that all power cords are disconnected from the power source.
1
2
Attention:
Turning off and turning on power without waiting for the storage
expansion enclosure disk drives to spin down can damage the drives and might
cause data loss. Always wait at least 70 seconds from when you turn off the power
until you turn on the power again.
Power-off overview
Review the following information before you continue with the power-off
procedure below.
Turn off the power to each device based on the following shutdown
sequence:
1.
Turn off power to the host before the storage subsystem. If the host must
stay powered on to support an existing network, see the operating system
documentation for information about disconnecting the storage subsystem
logical drives from the host before the storage subsystem is powered off.
2.
Turn off power to the storage subsystem before you turn off power to the
storage expansion enclosures. Turn off both power supply switches on the
back of the storage subsystem.
3.
Turn off power to other supporting devices (for example, management
stations, fibre-channel switches, or Ethernet switches).
Note:
You do not need to perform this step if you are servicing only the
storage subsystem.
Use the following procedure to turn off power to one or more storage expansion
enclosures for a planned shutdown. To turn off power for an unplanned shutdown,
see “Restoring power after an unexpected shutdown” on page 60.
Before proceeding, use the DS Storage Manager client to determine the status of
the system components and special instructions. The operating system software
might require you to perform other procedures before you turn off the power. To
turn off the EXP395, complete the following steps:
1.
Stop all I/O activity to each storage expansion enclosure.
2.
Remove the front cover from the storage expansion enclosure, if applicable.
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IBM System Storage DS3950 EXP395 Storage Expansion Enclosure: Installation, User’s, and Maintenance Guide
Summary of Contents for DS3950
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