IBM 86655RY - Netfinity 7600 - 8665, Hardware Maintenance Manual, Page: 193 / 294

Installing and configuring ServeRAID controllers
183
Note: ServeRAID-4H controllers have 4 channels; ServeRAID-4L controllers
have only one channel; and ServeRAID-4M controllers have 2
channels.
b. Confirm that the channel(s) identified from the error in step a on page 182 is
(are) the cause of the error by verifying that the error presents itself ONLY
when the offending channel is reconnected.
c. Check termination of identified channel.
Note: Refer to the HMM (Hardware Maintenance Manual) specific to the
system comprising the SCSI channel for termination details.
d. Check for proper backplane jumper configuration.
Note: Refer to the HMM (Hardware Maintenance Manual) specific to the
system comprising the SCSI channel for jumper details.
e. Check for proper cabling configuration in systems that use DASD status
cables. Reconnect all cables removed in step 1 above.
f. Disconnect one drive at a time attached to the channel identified in step a on
page 182; then, reboot to determine which drive is causing the error.
g. Replace SCSI cable.
h. Replace SCSI backplane.
FFFF or other code not listed
1. Isolate between SCSI Subsystem and controller by disconnecting all SCSI cables
attached to the suspect card, and reboot.
CAUTION:
Do not press F5. Doing so will change the customer’s configuration.
Table 20. SCSI identifier.
SCSI Channel Code (z) Descriptions
1 Channel 1
2 Channel 2
3 Channel 1 & 2
4 Channel 3
5 Channel 1 & 3
6 Channel 2 & 3
7 Channel 1, 2, & 3
8 Channel 4
9 Channel 1 & 4
A Channel 2 & 4
B Channel 1, 2, & 4
C Channel 3 & 4
D Channel 1, 3, & 4
E Channel 2, 3, & 4
F Channel 1, 2, 3, & 4