HP Integrity rx7640, Service Manual

Page: 138 / 195

Figure 5-13 Server Cabinet CRUs (Rear View)
Fan 2
Fan 3
A0
A1
B0
B1
Core I/O 0
Core I/O 1
Verifying Cell Board Insertion
Cell Board Extraction Levers
It is important that both extraction levers on the cell board be in the locked position. Both levers
must be locked for the cell board to power up and function properly.
Power to the cell board should only be removed using the
MP:CM>PE
command or by shutting
down the partition or server. Therefore, if the levers become unlocked, the partition will not
have a chance to logically shut down, and damage could occur to the operating system.
If the cell board is powered on and one lever becomes unlocked, the cell board will stay powered
on. However, if the cell board is powered off, it will not power on again until both levers are in
the locked position.
The lever status can be determined by issuing the
MP:CM>DE
command and viewing the power
status of the cell board controller (PDHC). The “ready” bit will only be true when both levers
are locked and all VRMs are installed. This status can be used to determine if both levers are
locked and the cell board is properly installed in the chassis. See
Figure 5-14 (page 139) for a
sample of the output.
If the state is
“RDY”
denoted by capital letters in the computer output then the “ready bit” is
true. If the state is “
rdy
” as denoted by lower case letters in the computer output then the “ready
bit” is false. Refer to Table 5-10 for details.
138 Server Troubleshooting