HP LH4r Integrated HP NetRaid Controller Configuration Guide - Page 10

Chapter 1 Introduction modules to be moved to an HP NetRAID-3Si adapter without losing data readability. Be sure to check your system's PCI I/O slot availability and any slot restrictions before purchasing another adapter. Fault-Tolerance and Management Features Fault-Tolerance features include the following: • Automatic failed-drive detection with Autorebuild (automatic rebuild with a hot spare or when a drive is replaced) • Manual hot-swap replacement Management features include the following: • Monitoring of HP NetRAID configuration, data parity consistency, and SNMP error messages • Rapid online configuration change and capacity expansion without the need to first back up all data, reconfigure the array, and reload the data Changing Capacity and RAID Levels The integrated HP NetRAID controller can expand capacity and change RAID levels of logical drives without powering down the server. • Online Capacity Expansion: You can add a physical drive to a RAID 0, 3, or 5 logical drive. This can be an online operation if you are running Microsoft Windows NT or Novell NetWare. (Preparations for capacity expansion must be made, as described in Chapter 6, "Preparing for Online Capacity Expansion.") • Online Capacity Reduction: You can remove a physical drive from a RAID 1, 3, or 5 logical drive as part of an online operation. • Online Changes to RAID Levels: You can convert a RAID 1, 3, or 5 logical drive to RAID 0. NOTE You cannot perform online conversions of logical drives that span arrays (RAID level 10, 30, or 50). 4