HP StorageWorks 70 Modular Smart Array Enclosure Maintenance and Service Guide (434895-003, March 2007)

Removal and replacement procedures 25
Removal and replacement procedures
This chapter describes how to power up and power down the MSA70, and how to remove and replace
the following MSA70 components:
• Access panel
• Hard drive blank
• Hot-plug SAS or SATA hard drive
• Hot-plug power supply
• Hot-plug fan
• I/O module
• Front UID module
• Power on/off module
• Power UID module
• 7-segment display board
• Riser board
• Midplane
• Backplane
Powering up and powering down
CAUTION:
Be sure that the server to which the MSA70 is connected is the first unit to be powered down and the last
to be powered back up. Taking this precaution ensures that the system does not erroneously mark the
drives as failed when the server is powered up.
IMPORTANT:
If installing a hot-plug device, it is not necessary to power down the enclosure.
Powering up
Observe the following guidelines before powering up the enclosure:
• Install all components of the enclosure.
• Install hard drives in the enclosure so the connected host controller can identify and configure them
at powerup.
• Always power up the enclosure first, and then the server. This ensures that the servers, during their
discovery, see the enclosure as an operational device. If you do not power up the enclosure before
powering up the servers, you will need to power down the servers, ensure that the enclosure is
powered up, and then power back up the servers.
To power up the enclosure: