HP StorageWorks NAS 1000s Quick Start Guide

35NAS 1000s Quick Start Guide
4
Hot-Plug Hard Drive
This chapter provides information about replacing the
hot-pluggable hard drives of the HP StorageWorks NAS 1000s.
Important Guidelines for Replacing
Hot-Pluggable Hard Drives
Follow these guidelines when replacing drives configured for
fault tolerance on an HP StorageWorks NAS 1000s:
■ Never remove more than one drive at a time.
When a drive is replaced, the controller uses data from the
other drives in the array to reconstruct data on the
replacement drive. If more than one drive is removed, a
complete data set is not available to reconstruct data on the
replacement drives and permanent data loss can occur.
■ Never remove a drive while another drive is being rebuilt.
A replaced drive is rebuilt from data stored on the other
drives.
■ If a drive is replaced while the system is Off, it may be
necessary to rebuild the replaced drive. Follow the
instructions in the “Replacing a Failed Hard Drive” section of
this guide or the instructions outlined in the system’s
reference guide.