5.5 HP StorageWorks X9720 Network Storage System Administrator Guide (AW549-96026, March 2011)

1. Remove the SAS cable in port 1 that connects the X9700c to the SAS switch in the c-Class blade
enclosure. Do not remove the two SAS expansion cables that connect the X9700c controller to
the I/O controllers on the X9700cx enclosure.
2. Slide the X9700c controller partially out of the chassiss:
a. Squeeze the controller thumb latch and rotate the latch handle down.
b. Pull the controller straight out of the chassis until it has clearly disengaged.
3. Remove the two SAS expansion cables that connect the X9700c to the I/O controllers on the
X9700cx enclosure, keeping track of which cable was attached to which port.
4. Pull the controller straight out of the chassis.
5. Ensure the new controller has batteries. If not, use the batteries from the old controller.
6. Insert the new controller in to the X9700c chassis, but do not slide it fully in.
7. Attach the two SAS expansion cables that connect the X9700c to the I/O controllers on the
X9700cx enclosure, ensuring that they are connected in the original places.
8. Push the controller fully into the chassis so it engages.
9. Reattach the SAS cable that connects the X9700c to the SAS switch in the c-Class blade enclosure.
This is plugged into port 1.
10. Run the exds_stdiag command to verify that the firmware is correct (if there are no errors
reported, then the firmware is correct). Normally, the new controller is flashed to the same firmware
revision as the running controller. However, the management (SEP) firmware is not automatically
updated.
IMPORTANT:
In dual-controller configurations, both controllers must execute the same version of firmware. If the
controllers have different firmware versions, the storage system responds as follows:
• Cold boot method. If a second controller is installed while the device is powered off, the system
compares the firmware versions of both controllers at power on and clones the most recent version
from one controller to the other controller.
• Hot plug method. If a second controller is installed while the device is powered on, the system
clones the firmware version of the active controller to the second controller.
CAUTION:
In hot-plug cloning, it is possible for firmware on a newly installed controller to be downgraded to
an earlier version. If this occurs, schedule a maintenance window and update the firmware of both
controllers to the latest version.
See the HP StorageWorks ExDS9100c/X9720 Storage System Controller Customer Self Repair
Instructions for more information.
Replacing the X9700c controller battery
You can hot swap the battery of an X9700c controller without interrupting file system activity (although
performance could degrade as the cache cannot be used during this period).
Replacing components in the X9720 Network Storage System140