
H-6 Recovering from Drive Failure
Compromised Fault Tolerance
If fault tolerance is compromised because of failure of multiple drives, the condition of the logical drive will be “failed,” and “unrecoverable” errors will be returned to the host. Data loss is probable. Inserting replacement drives at this time will not improve the condition of the logical drive. If this occurs, first try turning the entire system off and on. In some cases, an intermittent drive will appear to work again (perhaps long enough to make copies of important files) after cycling power. If a 1779 POST message is displayed, press F2 to
Fault tolerance may be compromised due to
In cases of “legitimate” drive failure, once copies of important data have been made (if possible), replace any drives that have failed to prevent further drive problems in the future. After these (multiple) drives are replaced, fault tolerance may again be compromised, power may need to be cycled, and the 1779 POST message may again be displayed. Press F2 to
Because of the risk that fault tolerance may be compromised at some point in the future, make regular backups of all logical drives.