System: HP ProLiant ML 110 Storage Server (Windows Storage Server 2003), RAID Controller: Adaptec 2410SA (4X 160GB).
Prompted by audible Disk status Alarm, investigated with HP Storage Manager, v. 3.10.00 (4242), Port 0 (Physical Drive) and Logical Drive ("Primary") were marked with a "Bang" (exclamation in yellow triangle), with the Logical Drive indicated "Degraded" status.
The Port 0 (Physical Drive) was marked "Set to Fail" and a OEM HP new replacement disk was installed. The Rebuild commenced automatically and the Data Logical Drive is "Optimal", however, Port 0 (Physical Drive), which was replaced, and the Logical Drive ("Primary") remain marked with "Bang", and the Logical Drive ("Primary") remains "Degraded" (Ports 1-3 are all "Optimal").
I ran the POST Adaptect (CTRL-A) BIOS utility and used "VERIFY & FIX" on the new Port 0 (Physical Drive) and the "Scan for New Disks" utility. Notwithstanding, the Logical Drive ("Primary") remains degraded with Port 0 (Physical Drive) marked with "Bang".
The most obvious solution is that the replacement disk is itself at fault, however, I suspect that this is just too easy, especially since we ran the "VERIFY & FIX" utility. (A replacement is, however, on order.) I also am skeptical that "power" or "cable" issues are the issue, as we were able to run the "VERIFY & FIX" utility.
Obviously, one needs to stay ahead on RAID array failures.