How to isolate the failed drive on Dell R710 using RHEL5 with a DELL PERC controller? [duplicate]

I know this isn't the quickest solution, but I'd recommend downloading the OMSA management utilities to the system and using the status page I mentioned earlier at http://server.ip:1311 or using the omreport command line utility to obtain the RAID array's status.

This is assuming that you don't have any physical access to the system. If you do, there should be an amber light illuminated on the failed drive.

The orange light on the caddy should be illuminated on the bad drive. If you don't have management agents installed, this is the best way. Good old visual inspection.

If nothing else, you can try looking for a serial number:

smartctl -a /dev/sdX

where /dev/sdX is a failed device. You'll see a device serial number (near the top). The serial number should also be written on the sticker on the drive itself.

ps: you might need to install "smartmontools" to get "smartctl"