NStor Technologies Disk Array Enclosure, CR8e manual Scsi Bus Symptom Probable Cause Solution

Page 67

 

 

Troubleshooting

 

 

 

SCSI Bus Symptom

Probable Cause

Solution

 

 

 

 

 

 

SCSI Bus hangs, SCSI

Faulty connectivity.

Re-check the cables to the I/O

Bus excessive retries,

 

Interface card and host adapter.

and/or drives drop

 

 

offline.

Faulty I/O Interface card.

Depending on how many

 

 

subsystem are connected on the

 

 

SCSI bus, you will need to

 

 

perform some fault isolation.

 

 

If all the drives on one bus are

 

 

offline, start with the subsystem

 

 

furthermost out on the chain.

 

 

Disconnect the data cable. If the

 

 

remaining drives return to a

 

 

normal state it indicates that

 

 

the isolated subsystem has the

 

 

faulty component.

 

 

If this does not return the

 

 

remaining drives to a normal

 

 

state, continue removing each

 

 

data cable on that bus until the

 

 

first subsystem is the remaining

 

 

subsystem.

 

 

If you had to remove all the data

 

 

cables up to the first subsystem

 

 

and the problem is still not

 

 

resolved, this could indicate

 

 

that the I/O Interface card in

 

 

the first subsystem is the

 

 

suspect faulty card. Use one of

 

 

the cards from the previous

 

 

subsystems or a “new” known

 

 

good card. This should return

 

 

the subsystem bus to a normal

 

 

condition.

 

 

Note: A return to a normal

 

 

condition is indicated by the

 

 

drives coming back online.

 

 

After the faulty card is

 

 

replaced, begin re-connecting

 

 

the data cables on the

 

 

remaining I/O Interface cards

 

 

noting the bus remains in a

 

 

normal state.

 

 

 

Common SCSI Bus Problems

55

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Contents Page NStor Corporation, Inc FCC Radio Frequency Interference Statement Regulatory InformationCompliance Information Statement Power Cord Selection Contents Maintenance InstallationUsing the CR8e TroubleshootingIndex Glossary Technical InformationContents Welcome PrefaceDrive Support FeaturesRegistering Your Product Where to Find AnswersViii Getting Started Fuse CR8e Subsystem at a GlancePower Supply #1 Hot Swap Disk Drives ComponentsHot Swap Cooling Fans Power Switch Hot Swap Power SuppliesDoor Lock Interface Card Power Cord Connector and FuseConfiguration Modules Operator Control Panel Controlling and MonitoringStatus Indicator LEDs Power-On LEDLEDs Activity LEDs Status LEDsFault LEDs Alarm SpeakerSAF-TE Card SAF-TE Card Setup InstallationGuidelines System RequirementsRack-Mount Subsystem Assembly Rack-Mount Subsystem Assembly Component Installation Drive Label Upper left bay, four drive slots Installing the Third Power Supply General Cabling ConfigurationCables Termination Dual-Bus Enclosure Ultra Wide Scsi ModeTOP Single-Bus Enclosure Installation Single Dual-Bus Enclosure Fast Wide Scsi ModeUltra Scsi Two Dual-Bus Enclosures Installation Bus Module installed Installation Two Single-Bus Enclosures Installation TOP Dual-Bus Enclosure with Two Single-Bus EnclosuresInstallation Other Configurations Notifications and Error Conditions Using the CR8ePower-On Self Test Scsi Bus Access Failure Firmware Error ConditionsRAM Checksum Failure SAF-TE LED Matrix LED DescriptionsStartup Screens Operator Control PanelSubsystem Status Icon Power Supply Error ConditionsHardware Menu Main MenuConfiguration Info Component StatusPost Results Internal Temp Scsi ID Menu Options MenuSET Upper Slot IDS SET Safte ID Lower Reset Default IDS Reset Default IDs Selection Heat Threshold Safte Chain ID Change Passcode Unlock Options Common Enclosure Problems TroubleshootingCommon Scsi Bus Problems Scsi Bus Symptom Probable Cause Solution LED Status Reason Solution Common Problems and Interpreting the LED IndicationsReplacing a Disk Drive MaintenanceReplacing a Power Supply Replacing a Power Supply Replacing the Cooling Fans Replacing an I/O Interface Card Replacing a Fuse Replacing the CR8e Cabinet Maintenance Glossary Glossary RAID SAF-TE Technical Information SpecificationsCR8e ConnectorsSignal Name Pin Conductor Jumpers JP3 SCSI-to-SCSI IDs JP2 SCSI-to-SCSI ConfigurationJP4 Scsi ID Settings Pins 1 Pins 3 Drive Spinup Mode JP5 SCA Remote/Delay startJ15 FAN and J17 OEM FAN Index RAID SAF-TE Index

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