v If you are on a Model 870 or 890: Go to step 13 (See page 352).
4. See Locations — Model 270 or Locations — Models 800 and 810. Remove all of the IOPs and IOAs,
EXCEPT for the first storage IOA. (Normally this would mean to remove all of the cards in locations
C07, C06, C05, C04, C03, and C02 - but leave the card in location C01.) Attempt to perform the
alternate IPL.
Does the same SRC occur?
v Yes: Continue with the next step.
v No: If the system IPLs past the original error, then isolate to the failing IOP or IOA card. Follow the
service actions for the new SRC.
5. Remove (and label) all of the storage device units EXCEPT for the alternate IPL load-source device
unit you are currently using. (This includes all of the disk devices in D01 - D06.) If the system IPLs
past the original error, then isolate to the failing device unit. If the failure still occurs, replace the
following FRUs one at a time until the problem is resolved. See the Remove and replace procedures.
v First storage IOA
v System unit backplane in location MB1
This ends the procedure.
6. See Locations - Model 820. Remove all of the IOPs and IOAs on bus 1, EXCEPT for the first storage
IOA. (Normally this would mean to remove all of the cards in locations C06, C04, C03, C02, and C01
- but leave the card in location C05.) Attempt to perform the alternate IPL.
Does the same SRC occur?
v Yes: Continue with the next step.
v No: If the system IPLs past the original error, then isolate to the failing IOP or IOA card. Follow the
service actions for the new SRC.
7. Remove (and label) all of the storage device units EXCEPT for the alternate IPL load-source device
unit you are currently using. (This includes all of the disk devices in D01 - D12.) If the system IPLs
past the original error, then isolate to the failing device unit. If the failure still occurs, replace the
following FRUs one at a time until the problem is resolved. See the Remove and replace procedures.
v First storage IOA
v System unit backplane in location MB1
This ends the procedure.
8. See Locations — Model 825. Remove the IOPs and IOAs, EXCEPT for the load-source IOP and the
first storage IOA. (Normally this would mean to remove the card in location C06 - but leave the cards
in location C07 and C05.)
Attempt
to perform the alternate IPL.
9. Does the same SRC occur?
v Yes: Continue with the next step.
v No: If the system IPLs past the original error, then isolate to the failing IOP or IOA card. Follow the
service actions for the new SRC.
This ends the procedure.
10.
Remove (and label) all of the storage device units EXCEPT for the alternate IPL load-source device
unit you are currently using. (This includes all of the disk devices in D01 - D15.) If the system IPLs
past the original error, then isolate to the failing device unit. If the failure still occurs, replace the
following FRUs one at a time until the problem is resolved. See Locations - Model 825 for part
number and remove and replace information.
v First storage IOA
v System unit backplane in location CB1
This ends the procedure.
11.
See Locations - Models 830, SB2 system unit with FC 9074 base I/O tower.
Analyze hardware problems 351
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