Dell PowerVault MD3000 - Manual (Page 91)

Maintaining a Storage Array
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Maintaining a Storage Array
Maintenance covers a broad spectrum of activities. Its goal is to keep a storage
array operational and available to all hosts. This chapter provides descriptions
of command line interface (CLI) and script commands that you can use to
perform storage array maintenance. The commands are organized into four
sections:
• Routine maintenance
• Performance tuning
• Troubleshooting and diagnostics
• Recovery operations
The organization is not a rigid approach, and you can use the commands as
appropriate for your storage array. The commands listed in this chapter do not
cover the entire array of commands you can use for maintenance. Other
commands, particularly the set commands, can provide diagnostic or
maintenance capabilities.
Routine Maintenance
Routine maintenance involves those tasks you might perform periodically to
ensure that the storage array is running as well as possible or to detect
conditions before they become problems.
Running a Media Scan
Media scan provides a method of detecting physical disk media errors before
they are found during a normal read from or write to the physical disks. Any
errors detected are reported to the Major Event Log (MEL). Media scan
provides an early indication of a potential drive failure and reduces the
possibility of encountering a media error during host operations. A media