212 QXS G2 Hardware Installation and Maintenance Guide
The 5U84 chassis CRU replaces a chassis that has been damaged, or whose midplane has been
damaged. Often, a damaged midplane will appear as though a RAID controller has failed. If you
replace a controller module and it does not remedy the fault, you may need to replace the RAID
chassis.
You can observe chassis health (front panel and rear panel) using management interfaces to verify
chassis/component failure or chassis/component operation. See also Using Management Interfaces
on page 190.
Preparing to Remove a Damaged 5U84 Chassis
Because you are removing and replacing an entire chassis, neither the hot-swap capability that
applies to replacing individual redundant CRUs in an operational chassis, nor the hot-add of a drive
chassis to an operational storage system, apply to this procedure.
1 Stop all I/O from hosts to the system. See also Stopping I/O on page 181.
2 Shut down the controllers. See also Shutting Down a Controller Module on page 182.
3 Power off the system – RAID chassis
first
; expansion chassis
next
: see Powering On/Powering Off
on page 105.
Ta b l e 4 7 Replacing a 5U Chassis and Installing CRUs
To accomplish this sequential process: See the following procedures:
1 Facing the front of the 5U chassis, access the
drawers and remove DDICs (label each DDIC)
from the damaged chassis and place them in a
static-protected work area nearby.
1 & 4
a Opening a 5U84 Drawer on page 191
b Removing a 5U84 DDIC on page 192
c Closing a 5U84 Drawer on page 192
2 Facing the rear of the 5U chassis, remove the
power and data cables.
Removing a Damaged 5U84 Chassis from the
Rack on page 213
3 Remove the damaged storage chassis from the
rack.
2
Removing a Damaged 5U84 Chassis from the
Rack on page 213
4 Remove the two PSUs from the damaged
chassis rear panel, and install them in the
replacement chassis.
a See PSU related cautions and tips in Removing a
5U84 System PSU, page 202.
b Removing a 5U84 System PSU, page 202
c Installing a 5U84 System PSU, page 204
5 Remove the five fans from the damaged chassis
rear panel, and install them in the replacement
chassis.
a Removing a 5U84 System Fan, page 205
b Installing a 5U84 System Fan, page 206
6 Remove the two controllers or expansion IOMs
from the damaged chassis rear panel, and
install them in the replacement chassis.
3
a Replacing a 5U84 RAID Controller or Expansion
IOM, page 207
b Removing a 5U84 RAID Controller or Expansion
IOM, page 208
c Installing a 5U84 RAID Controller or Expansion
IOM, page 210
d Verifying Component Operation, page 189
7 Install the replacement storage chassis in the
rack.
Installing a Replacement 5U84 Chassis into the
Rack, page 214
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