Chapter 2. Best Practices For Troubleshooting; Record Access Information; Follow Power Management Procedures; Access Information For Your System - IBM Storwize V7000 Troubleshooting And Maintenance Manual

Chapter 2. Best practices for troubleshooting

Troubleshooting is made easier by taking advantage of certain configuration options and ensuring that
you have recorded vital information that is required to access your system.

Record access information

It is important that anyone who has responsibility for managing the system know how to connect to and
log on to the system. Give attention to those times when the normal system administrators are not
available because of vacation or illness.
Record the following information and ensure that authorized people know how to access the information:
v The management IP addresses. This address connects to the system using the management GUI or
starts a session that runs the CLI commands. The system has two Ethernet ports. Each port can have
either an IPv4 address or an IPv6 address or both. Record these addresses and any limitations
regarding where they can be accessed from within your Ethernet network.
v The service IP address of the node canisters. The service IP address connects to a node canister in the
control enclosure. Access to the address is sometimes required if the canister has a fault that stops it
from becoming an active member of the system. Each of the two node canisters can have a service IP
address that is specified for Ethernet port 1. Each address can have either an IPv4 address or an IPv6
address or both. Ensure that the address specified for each node canister is different.
v The Storwize V7000 system password for user superuser. The password is required to access the
system through the service IP address. The authentication of superuser is always local; therefore, the
user ID can be used when a remote authentication server that is used for other users is not available.
Table 13. Access information for your system
Item
Management IP address: Ethernet
port 1
Management IP address: Ethernet
port 2
Service IP address: node canister 1
Service IP address: node canister 2
Superuser password

Follow power management procedures

Access to your volume data can be lost if you incorrectly power off all or part of a system.
Use the management GUI or the CLI commands to power off a system. Using either of these methods
ensures that the data that is cached in the node canister memory is correctly flushed to the RAID arrays.
Do not power off an enclosure unless instructed to do so. If you power off an expansion enclosure, you
cannot read or write to the drives in that enclosure or to any other expansion enclosure that is attached to
it from the SAS ports. Powering off an expansion enclosure can prevent the control enclosure from
flushing all the data that it has cached to the RAID arrays.
Remove a node canister only when directed to do so by a service action. Physically removing an active
node canister means that it is unable to write any configuration data or volume data that it has cached to
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Value Notes
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