IBM TotalStorage 300 Service Manual page 43

1. If the port LED blinks slow yellow (blinks every two seconds), the port is
disabled. The customer needs to re-enable the port using the Storwatch
Managed Hub Specialist Web interface or a Telnet session. See the IBM NAS
300 User's Reference for information on disabling and re-enabling ports. Have
the customer re-enable the port.
2. If the port LED blinks fast yellow (blinks every 1/2 second), perform the
following steps:
a. Remove the incoming cables from the failing ports. Mark them to ensure
that you can return them to the same port.
b. If the port is port 7, remove and reseat the GBIC.
c. Insert one of the small single GBIC port wrap connectors (black for ports 0 -
6). For port 7, the connector is black if the GBIC is short wavelength or gray
if it is long wavelength. Wait 10 seconds and observe the associated port
LED. If it is blinking green, the GBIC and port are functional. Do this for all
suspect ports. If all ports show a blinking green port LED, check the other
customer configuration information or the associated fibre-channel cables.
See "Checking the customer configuration (action code 6)" on page 34 and
"Suspect fibre-channel cable (action code 7)" on page 34
d. If any of the LEDs for ports 0 - 6 do not blink green, replace the Fibre
Channel hub. See "Working with the Fibre Channel hub" on page 110. If the
LED for port 7 does not blink green, replace the GBIC with a new (known
good) GBIC.
e. After replacing the GBIC in port 7, again insert the single port wrap
connector. If the port LED still does not blink green, replace the Fibre
Channel hub. See "Working with the Fibre Channel hub" on page 110.
3. If the port LED is steady yellow, this indicates that the port is receiving a signal,
but the attached device is not yet online, and the device is likely not in the
ready state. Have the customer make the device ready. If the customer is
unable to correct the problem, see "Abnormal port LED/Function (action code
3)" on page 32.
4. If the port LED blinks a fast green (1/2-second blink, not a flickering light),
replace the Fibre Channel hub. See "Working with the Fibre Channel hub" on
page 110
5. If the port LED blinks slow green (2-second blink), it indicates that a bad cable
or a wrap cable is installed. Perform the following steps:
a. Verify if a wrap cable is installed or if a wrap connector is installed at the
other end of the cable. If either of these situations is true, correct it.
b. If a wrap cable or wrap connector is not installed, replace the cable or ask
the customer to have his cabling supplier check the cable, whichever is
appropriate.
6. If the port 0 - 6 LEDs show no light with no cable installed, or if port 7 shows no
light with a GBIC installed but no cable, perform the following steps:
a. This is normal. A cable from an appropriate device needs to be installed if
the port is to be used.
b. If the device cable is present, insert the cable into the GBIC or port.
7. If the port LED shows no light and a cable is installed, make sure that the
attached device is turned on and ready.
8. If the attached device is turned on and ready, it is necessary to check other
customer configuration information, or the associated fibre-channel cables. See
"Checking the customer configuration (action code 6)" on page 34 and "Suspect
fibre-channel cable (action code 7)" on page 34.
Chapter 3. Troubleshooting
33