Quantum QXS G2 Series, Hardware Installation And Maintenance Manual

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196 QXS G2 Hardware Installation and Maintenance Guide
• The number of rows must not differ by more than 1 between the top and bottom drawers.
• The rows should be populated from front to rear of drawer.
• The drives of the expansion package must match the drives originally shipped with the 5U84
chassis. Both groups of drives must share the same model type and capacity.
NOTE: Part numbers for expansion packages are not listed because they change over time
when drives ship with new firmware, or new drive models become available. Contact your
account manager for part numbers.
•
If the two groups of drives have different firmware, all drives must be updated with
current/compatible firmware. See the
QXS G2 Disk Management Utility User Guide
or online help
for additional information about updating firmware.
Installation Guidelines
The recommended order for partially populating drives in the 5U84 chassis optimizes the airflow
through the chassis. Please reference the following illustrations:
• Front of 5U84 RAID or Expansion Chassis on page 23 shows location and indexing of drawers
accessed from the chassis front panel.
• Figure 149 on page 193 shows dual-indexing of disk slots across front, middle, and back rows of a
drawer.
The 5U84 ships with drawers installed in the chassis, However, to avoid shock and vibration issues
during transit, the chassis does not ship with DDICs installed in the drawers. A chassis is configured
with either 42 disks (half-populated) or 84 disks (fully populated) for customer delivery. If
half-populated, the rows containing drives should be populated with a full complement of DDICs (no
blank slots in the row). The bullet-list below identifies rows in drawers that should contain DDICs
when the chassis is configured as half-populated:
• Top drawer–front row
• Top drawer–middle row
• Bottom drawer–front row
If additional drives are incrementally installed into a half-populated chassis, the DDICs must be added
one row at a time (no blank slots in row) in the sequence listed:
• Bottom drawer–middle row
• Top drawer–back row
• Bottom drawer–back row
Replacing a 5U84 Bezel
The 5U84 ships with the bezels installed on the chassis drawers (Drawer 0 and Drawer 1). Refer to
Figure 154 . If the bezel for Drawer 0 or Drawer 1 is damaged, it must be replaced.
Comply with all ESD precautions. Refer to ESD Precautions on page 165 for additional information.
NOTE: When replacing a damaged bezel, do not open the drawer. Perform all work with the drawer
closed.