HP StorageWorks 2500 Disk System - Manual (Page 56)

Best practices for replacing hardware components
The following information will help you replace the hardware components on your DS2500 successfully.
Follow these tips any time you replace a component.
CAUTION:
Removing a component significantly changes the air flow within the enclosure. All components must be
installed for the enclosure to cool properly. If a component fails, leave it installed until a replacement is
available.
Components can be damaged by electrostatic discharge (ESD). Use proper antistatic protection as
follows:
• Always transport and store CRUs in an ESD protective enclosure.
• Do not remove the CRU from the ESD protective enclosure until you are ready to install it.
• Always use ESD precautions, such as a wrist strap, heel straps on conductive flooring, and an
ESD protective smock when handling ESD sensitive equipment.
• Avoid touching the CRU connector pins, leads, or circuitry.
• Do not place ESD generating material such as paper or non-antistatic (pink) plastic in an ESD
protective enclosure with ESD sensitive equipment.
• Wait until periods of low storage system activity to replace a component.
When replacing components at the rear of the rack, cabling may obstruct access to the component.
Carefully move any cables out of the way to avoid loosening any connections. In particular, avoid
cable damage that may be caused by:
• Kinking or bending tighter than a 1.375-inch bend radius.
• Placing removed cables on the floor or other surfaces, where they may be walked on or
otherwise compressed.
• Disconnecting cables without installing a dust cap. If a cable is uncapped, its performance may
be impaired by contact with dust, metal or other surfaces.
CAUTION:
Fiber optic cables do not transmit data consistently when compromised by dust and debris. To protect
the connectors, always install the dust covers whenever a transceiver or a fiber cable is disconnected.
When connecting a transceiver or fiber cable, remove, but do not discard the dust covers or dust caps.
Verifying component failure
Confer with HP technical support to verify that the hardware component has failed and that you are
authorized to replace it yourself.
Multiple hardware failures can complicate component replacement. Check the System Event Analyzer to
detect any additional hardware problems.
Procuring the spare part
Parts have a nine-character spare component number on their label ( Figure 29 -1). The first six characters
(123479) identify the component; the last three characters (002 in this example) define the revision level.
The replacement component revision level must be the same as, or greater than, the number on the
component being replaced. The higher the revision level, the later the revision.
56 Customer self repair