USB key and Initialization tool interface . . . 176
Event reporting.............181
Understanding events .........182
Event notifications...........183
Power-on self-test ...........184
Understanding events .........184
Understanding the error codes ......184
Viewing logs and traces .........185
Understanding the battery operation for the control
enclosure ...............185
Maintenance discharge cycles .......186
Understanding the medium errors and bad blocks 187
Resolving a problem ...........189
Start here: Use the management GUI
recommended actions .........189
Problem: Storage system management IP
address unknown ...........190
Problem: Unable to connect to the management
GUI...............190
Problem: Unable to log on to the storage system
management GUI ...........191
Problem: Cannot create a clustered storage
system ..............191
Problem: Unknown service address of a node
canister ..............192
Problem: Cannot connect to the service assistant 193
Problem: Management GUI or service assistant
does not display correctly ........194
Problem: Node canister location error ....194
Problem: SAS cabling not valid ......194
Problem: New expansion enclosure not detected 195
Problem: Mirrored volume copies no longer
identical ..............195
Problem: Code not processed from USB key . . 195
Procedure: Resetting superuser password . . . 196
Procedure: Identifying which enclosure or
canister to service ...........196
Procedure: Checking the status of your system 197
Procedure: Getting node canister and system
information using the service assistant ....197
Procedure: Getting node canister and system
information using a USB key .......198
Procedure: Understanding the system status
using the LEDs ............198
Procedure: Finding the status of the Ethernet
connections .............203
Procedure: Removing system data from a node
canister ..............204
Procedure: Deleting a system completely . . . 204
Procedure: Fixing node errors .......204
Procedure: Changing the service IP address of a
node canister ............205
Procedure: Accessing a canister using a directly
attached Ethernet cable .........206
Procedure: Reseating a node canister ....206
Procedure: Powering off your system ....207
Procedure: Collecting information for support 208
Procedure: Rescuing node canister software
from another node (node rescue) ......208
Removing and replacing parts ........208
Preparing to remove and replace parts ....209
Replacing a node canister ........209
Replacing an expansion canister ......211
Replacing an SFP transceiver .......212
Replacing a power supply unit for a control
enclosure ..............214
Replacing a power supply unit for an expansion
enclosure ..............217
Replacing a battery in a power supply unit . . 221
Releasing the cable retention bracket ....225
Replacing a 3.5" drive assembly or blank carrier 225
Replacing a 2.5" drive assembly or blank carrier 227
Replacing an enclosure end cap ......228
Replacing a SAS cable .........228
Replacing a control enclosure chassis ....229
Replacing an expansion enclosure chassis . . . 235
Replacing the support rails ........237
General storage system procedures ......238
SAN problem determination .......238
Fibre Channel link failures ........239
Ethernet iSCSI host-link problems .....239
Recover system procedure .........240
When to run the recover system procedure . . 240
Fix hardware errors ..........242
Removing system information for node canisters
with error code 550 or error code 578 using the
service assistant ...........243
Performing system recovery using the service
assistant ..............243
Recovering from offline VDisks using the CLI 245
What to check after running the system
recovery ..............245
Backing up and restoring the system configuration 246
Backing up the system configuration using the
CLI................247
Deleting backup configuration files using the
CLI................249
Chapter 6. Call home and remote
support ..............251
Configuring the remote support system ....251
Establishing an AOS connection ......251
Chapter 7. Recovery procedures . . . 255
User ID and system access .........255
Accessing a file module as root ......255
Recovering from losing the root password. . . 255
Resetting the NAS ssh key for configuration
communications ...........256
Working with NFS clients that fail to mount
NFS shares after a client IP change .....257
Working with file modules that report a stale
NFS file handle............258
File module-related issues .........258
Restoring System x firmware (BIOS) settings 258
Recovering from a multipath event .....259
Recovering from an NFSD service error . . . 260
Recovering from an SCM error ......260
Recovering from an httpd service error ....261
Recovering from an sshd_data service error . . 261
Recovering from an sshd_int service error . . . 261
iv Storwize V7000 Unified: Problem Determination Guide Version
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