IBM DS3000 Introduction And Implementation Manual page 74

7065Cabling.fm
Powering on
It is important that you follow the correct power-on sequence, or the system might not work
properly. Power the components on in this order:
1. SAN switches should be powered on first. In a typical SAN environment, the SAN switches
are kept up and running all the time and are typically only be powered down in case of
emergency.
2. EXP3000 enclosures are next. Turn on the switches on both power supplies on each
EXP3000 enclosure. Allow enough time for the enclosures to fully power up - this can take
several minutes.
3. After all EXP3000 enclosures are up and running, power on the DS3000. Be aware that
large configurations can take up to ten minutes to fully power up.
4. Finally, power on all the host servers.
Important: We do not recommend powering on a DS3000 subsystem without any disk
drives installed. If you do so, a new Feature Enable Identifier (FEI) will be generated, which
could cause premium features to go out of compliance.
Should this happen, power on with the drives reinserted to restore the original FEI and
make the premium features compliant again.
Powering off
In normal circumstances, the DS3000 subsystem would rarely be powered off - it is designed
to run continuously. However, in certain events (scheduled maintenance, controller
replacement on a single controller subsystem, emergency due to unforeseen circumstances
etc.) you will have to power the subsystem off. Use the same steps as above, but in the
reverse order. If you cannot shutdown and power off the host servers, then make sure the
DS3000 logical drives are unmounted at the operating system level.
Important: Unless in an emergency, the DS3000 subsystem should never be turned off if
any amber LEDs are lit. You should use the Recovery Guru and other troubleshooting
tools to correct the failure first.
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IBM System Storage DS3000: Introduction and Implementation Guide
Draft Document for Review August 30, 2007 12:59 am