Dell PowerVault MD3200 CLI Guide - Page 100

Recovery Operations, Setting RAID Controller Module Operational Mode

Page 100 highlights

For best results, run all three tests at initial installation. Also, run the tests any time you make changes to the storage array or to components connected to the storage array (such as hubs, switches, and host adapters). A custom data pattern file called diagnosticsDataPattern.dpf is included on the Utility directory of the installation CD. You can modify this file, but the file must have the following properties to work correctly for the tests: • The file values must be entered in hexadecimal format (00 to FF) with only one space between the values. • The file must be no larger than 64 bytes in size. Smaller files can be used, but larger files can cause an error. The test results contain a generic, overall status message and a set of specific test results. Each test result contains the following information: • Test (read/write/data loopback) • Port (read/write) • Level (internal/external) • Status (pass/fail) Events are written to the MEL when diagnostics are started and when testing is completed. These events help you to evaluate whether diagnostics testing was successful or failed and the reason for the failure. Recovery Operations Recovery operations involve replacing failed RAID controller modules and physical disks, restoring data, and restoring the storage array to operation. Setting RAID Controller Module Operational Mode A RAID controller module has three operational modes: • Online • Offline • Service CAUTION: Placing a RAID controller module offline can cause loss of data. 100 Maintaining a Storage Array

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100
Maintaining a Storage Array
For best results, run all three tests at initial installation. Also, run the tests any
time you make changes to the storage array or to components connected to
the storage array (such as hubs, switches, and host adapters).
A custom data pattern file called
diagnosticsDataPattern.dpf
is included on
the
Utility
directory of the installation CD. You can modify this file, but the
file must have the following properties to work correctly for the tests:
The file values must be entered in hexadecimal format (00 to FF) with
only one space between the values.
The file must be no larger than 64 bytes in size. Smaller files can be used,
but larger files can cause an error.
The test results contain a generic, overall status message and a set of specific
test results. Each test result contains the following information:
Test (read/write/data loopback)
Port (read/write)
Level (internal/external)
Status (pass/fail)
Events are written to the MEL when diagnostics are started and when testing
is completed. These events help you to evaluate whether diagnostics testing
was successful or failed and the reason for the failure.
Recovery Operations
Recovery operations involve replacing failed RAID controller modules and
physical disks, restoring data, and restoring the storage array to operation.
Setting RAID Controller Module Operational Mode
A RAID controller module has three operational modes:
Online
Offline
Service
CAUTION:
Placing a RAID controller module offline can cause loss of data.