HP ProLiant DL580 Setup And Installation Manual page 55

Smart Array 5i Plus Controller
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Interim data recovery occurs if a drive fails in fault tolerant configurations
(RAID 1 or RAID 5). In this situation, the system will still process I/O requests,
but at a reduced performance level. Replace the failed drive as soon as possible
to restore performance and full fault tolerance for that logical drive. Otherwise, if
another hard drive fails before data has been rebuilt, the logical volume will fail
and data will be lost.
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Predictive failure alert is a powerful problem-prevention feature that warns you
when a drive failure is imminent. This feature allows you to take corrective
action with minimal effect on critical business operations. The system must use
Insight Manager and an HP Smart Array controller to benefit from predictive
failure alert.
Instructions for using the predictive failure alert feature can be found in the
documentation for Insight Manager software and HP Management Agents. This
documentation is located on the Management CD.
NOTE: An online spare will not become active and start rebuilding after a predictive
failure alert, because the degraded drive has not actually failed yet and is still online. The
online spare is activated only after a drive in the array has failed.
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POST or the Array Diagnostics Utility (ADU) also reveals imminent drive
failure.
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Recovery ROM is a controller redundancy feature that ensures continuous
system availability by providing a backup ROM. This feature protects against
corruption of a ROM image (caused, for example, by power fluctuation during
ROM upgrade). If corruption occurs, the server automatically restarts using the
remaining good copy of the ROM image.
When you upgrade the ROM, the inactive image (the one not being used by the
system) is upgraded. No noticeable difference in operation normally occurs.
When you use Recovery ROM for the first time, however, the backup ROM
images are upgraded, causing a boot delay of about 20 seconds.
Other HP options, such as Insight Manager, provide additional drive failure features.
Refer to an authorized reseller for more information about these products.
3-6 HP ProLiant DL580 Generation 2 Server Setup and Installation Guide