OK, I give UP on RAID. The drives are the same model number, but they were bought about a month apart and have different versions of firmware. A quick format seems to work, but a regular format immediately comes up bad.
The BIOS RAID Configuration menu appears, presenting the following options:
* Array Configuration Utility
* SATASelect Utility
* Disk Utilities
To select an option from this menu, or from any of the menus within the utility, browse with the arrow keys, then press <Enter>. In some cases, selecting an option displays another menu. To return to the previous menu at any time, press <Esc>.
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