Identificación de Riesgos

For instructions for obtaining service and technical assistance for the storage subsystem and other IBM products, see Appendix B, “Getting help and technical assistance,” on page 187.

Use the LEDs, the diagnostics and test information, the symptom-to-FRU index, and the connected server Hardware Maintenance Manual or Problem Determination and Service Guide to diagnose problems.

Use Table 17 on page 162 and the Storage Manager Recovery Guru to diagnose storage subsystem problems and component failures and find solutions to

problems that have definite symptoms. Do not depend solely on Table 17 on page 162 for a replacement decision.

Table 17. Troubleshooting

Problem indicator Component Possible cause Possible solutions Amber LED is lit

Drive (drive fault LED)

Drive failure Replace the failed drive. See Chapter 5, “Replacing components,” on page 105 for more information.

Drive uncertified Verify the drive and part number to ensure that it is supported by the DS3500. See

controller failure Replace the controller. See Chapter 5, “Replacing components,” on page 105 for more information. window to place the controller back online. If the controller continues going to an offline state after being placed online, replace the controller.

storage controller (battery fault LED)

Battery unit failure Use the Storage Manager software to confirm the failure;

then, replace the failed battery unit.

storage controller (SAS link service action LED)

SAS cable failure Replace the SAS cable.

SAS host bus adapter failure

Check the SAS host bus adapter in the host and replace the adapter if necessary.

SAS port failure Replace the controller. See Chapter 5, “Replacing components,” on page 105 for more information.

Front bezel (system error LED)

General machine

fault A fault LED is lit somewhere on the storage subsystem (check for amber LEDs on components).

General machine

fault (continued) Open the Subsystem

Management window and click Recovery Guruto see problems in the DS3500 configuration.

Some errors cause the system error LED to be lit but not cause any individual component fault LEDs to be lit. (Drive PFA exceeded or nominal temperature exceeded errors are examples.) Follow the corrective actions in the Recovery Guru window.

Table 17. Troubleshooting (continued)

Problem indicator Component Possible cause Possible solutions Amber LED is lit match. Check that host daughter card and cache memory are the same in both controllers.

Front panel Fibre Channel

connection Check that the CRUs are properly installed. If no amber LEDs are lit, suspect failure of the SFP module. Verify the failure using the Storage Manager Client.

If all Fibre Channel connections failed, suspect failure of the Fibre Channel host daughter card.

SAS connection

Check the SAS connection to verify that the CRUs are properly installed.

If the SAS port LED is off, suspect failure of the SAS host daughter card.

iSCSI connection

Check the iSCSI connection to verify that the CRUs are properly installed.

If the iSCSI port LED is off, check the Ethernet cable or verify the link speed.

If all the iSCSI port LEDs are off, suspect failure of the iSCSI host daughter card.

Battery fault Battery unit failure Verify the failure using the Storage Manager Client and

Replace the failed power supply or turn on all power-supply switches. If this is a dc power supply, check the disconnect device to ensure that it is working and is in the on position.

Table 17. Troubleshooting (continued)

Problem indicator Component Possible cause Possible solutions Amber and green

LEDs are lit Power supply (Amber fault

Replace the failed power supply.

See Chapter 5, “Replacing components,” on page 105 for more information.

Check for and solve one of the following situations:

v storage enclosures are not correctly connected to the DS3500.

v DS3500 does not have the correct firmware version.

All green LEDs are off

All components Subsystem power is off

Ensure that all storage subsystem power cables are connected and that the power-supply switches are on. If applicable, ensure that the main circuit breakers for the rack are turned on.

Power failure Check the main circuit breaker and ac receptacle (ac models).

Check the -48 V dc power source and disconnect device (dc

No corrective action is needed.

Table 17. Troubleshooting (continued)

Problem indicator Component Possible cause Possible solutions One or more

green LEDs are off

Power supplies Power cable is disconnected or switches are turned off

Ensure that the power cables are connected (ac or dc) and that the disconnect device (dc only) and the power-supply switches are turned on.

All drives Midplane failure Replace the DS3500. Contact your IBM technical-support representative.

Several components

Hardware failure Replace the affected components.

If this does not correct the problem, replace the controllers.

Perform one of the following actions:

v Power-on the storage subsystem.

v Ensure that the SAS cable connections between the

Ensure that the power cables are connected and that the power supplies are turned on.

Hardware failure If any other LEDs are lit, replace the midplane. Contact your IBM technical-support representative.

Green LED is flashing slowly (once every 2 seconds)

Drives The DS3500 was not powered-on, or all

Perform one of the following actions:

v Power-on the storage subsystem.

v Ensure that the SAS connections between the storage enclosures and the DS3500 storage subsystem are made.

v Ensure that all the storage enclosures in the same channel pair have the same enclosure speed setting.

Table 17. Troubleshooting (continued)

Problem indicator Component Possible cause Possible solutions Intermittent or

Check the ac or dc power source.

Reseat all installed power cables and power supplies. If

Check the fault LED on the power supply. If the LED is lit, replace the failed component.

Faulty disconnect device

Check and install a new 20 A rated disconnect device.

Midplane failure Replace the DS3500. Contact your IBM technical-support

Ensure that the SAS cables are undamaged and correctly connected. Check the storage subsystem ID settings.

controller failure Replace one or both controllers.

Contact an IBM technical-support representative.

Drive failure Replace the failed drive or drives.

Random errors Subsystem Midplane failure Replace the DS3500. Contact your IBM technical-support representative.

Table 17. Troubleshooting (continued)

Problem indicator Component Possible cause Possible solutions drive is not visible

in the Storage Manager software

Several components

Drive failure Replace the failed drive or drives.

SAS cable failed Replace the SAS cable.

controller failure Replace controller. See Chapter 5,

“Replacing components,” on page 105 for more information.

Midplane failure Replace the DS3500. Contact your IBM technical-support

Replace the drive. See Chapter 5,

“Replacing components,” on page 105 for more information.

Incorrect firmware version

Ensure that the DS3500 has the correct firmware version. See

Replace the failed controller and ESM. See Chapter 5, “Replacing components,” on page 105 for more information.

Verify that the storage enclosure is supported by the DS3500 storage subsystem.

SAS cable failed Replace the SAS cable.