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I know IBM System x, but HP should be similar. Go to HP.com under support and download and search for Insight Manager. This is HP's tool for monitoring the hardware. I'm pretty sure this contains the monitors for the raid card, but it may not cover all raid cards they sell. You may need an additional plug in for a specific raid card. The Raid card is what actually monitors the health of the drives and array. Installing the correct monitoring software will allow the raid card to report to the operating system any problems. Don't assume it works. Install the software and if the drives are hot swap SAS drives, pull a drive and be sure you get the alert you hoped to get. If they are not hot swap drives, like SATA, you may want to pull a power cable to get an alert. On some systems you may need to put the drive back online after you pull it. Some raid cards are smart enough to see its the same serial number drive, and they assume it's failed and will not put it back online automatically. On IBM hardware they offer PFA alerts which are called Predictive Failure Alerts before the drive fails. This will alert you for example if the drive is over temperature, or if a drive starts deteriorating with bad blocks. If an IBM drive gives off a PFA, IBM will replace it before it fails. The reason I mention this is because "pulling a drive" is not a perfect test. When a drive is pulled many systems will notice the removal of the device from the drive backplane, and the backplane will report the problem. This is basic hardware alerting, but in most cases when a drive fails, it is still inserted in the slot. Monitoring just the backplane will not pick up things like a hard drive PFA, or an over temperature alert. Hope this helps.
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