Troubleshooting the SA7x
5.7 Troubleshooting the OCP
f. The enclosure assembly (See the appropriate storage array guide for
instructions.)
If a disk drive does not respond to OCP commands, move it to another drive
position in the enclosure to see if the drive is at fault or if the drive position is at
fault.
1. If the disk drive is at fault, replace the RA7x ECM. (See the
RA7x Disk Drive
Service Manual
for instructions.)
2. If the disk drive is
not
at fault, replace the FRUs in the following order until
the problem is corrected:
a. OCP
b. The two OCP ribbon cables
c. TB1
d. TB2
e. The enclosure assembly (See the appropriate storage array guide for
instructions.)
3. If the unit number changes after power up, replace the FRUs in the following
order until the problem is corrected:
a. TB2
b. Power supply
c. OCP
d. The two OCP ribbon cables
e. TB1
f. The enclosure assembly (See the appropriate storage array guide for
instructions.)
Troubleshooting the SA7x 5–7
