We are running an older HP Proliant ML370 server and for some time now it's had 1 drive in our 4 drive RAID 5 show as bad. This behavior started some time ago and we used to be able to reboot the server, and it would recover the RAID and then be fine for a few months. It finally got to the point where no matter how many times we would reboot, it would not come back up, and now the drive is always amber. We got a replacement drive from our HP supply reseller, and had no change. We thought we had gotten a bad drive, but the replacement's replacement did the same thing.
If we go into the RAID configuration utility in the BIOS, it does not see that there is a drive present in that slot and has the RAID in interim recovery mode. In the HP Array Configuration Utility also lists it in interim recovery mode and has "???" instead of a GB size of the drive. The drives status is failed.
We are getting to the point of wondering if we either have a bad port, or a bad RAID Controller. The server is old enough to where we don't really want to put any money into it, but we can't phase it out just yet. Please let us know if we are looking at a physical problem, or if we are missing that magical "rebuild array" button buried deep somewhere.