User Manual

627
Product Manual Troubleshooting
finding And cOrrecting the cAuse Of the PrObleM
External Checks
Make the following external checks to your Vess subsystem. Be sure that:
• BothRAIDcontrollersarepresent,fullyinsertedintotheirslots,andlockedintoplace.
• TheRAIDcontrollersmatch,meaningbotharethesamemodel
• AllSASexpansioncablesfromtheRAIDcontrollerstoexternal
JBODunitsingoodconditionandaresecurelyconnected.
Internal Checks
If all external checks are OK, take the following actions:
1. Shut down the Vess.
See “Shutting Down the Subsystem” on page 110.
2. Remove one of the RAID controllers.
See “Replacing a RAID Controller – Dual Controllers” on page 544.
3. Restart the Vess.
4. After the Vess is fully booted, view the controller information.
“Viewing Controller Information” on page 112.
5. Observe and record the following information about the rst controller:
• SDRAMmemorysize
• Hardwareversion
• Firmwareversion
6. Shut down the Vess.
7. Remove the rst controller and install the second controller.
8. Repeat steps 3 through 6. Then compare your records.
9. Correct any differences between the two controllers. See “Updating Firmware on a RAID Subsystem” on
page 117.
Important
A disconnected SAS expansion cable causes the two RAID con-trollers to see
a different set of congured drives. This condition is the most common cause
of a controller entering maintenance mode.