Adaptec 2074700-R User Guide - Page 186
The Fail State, 5.21.5, The Error State
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ICP RAID Navigator The disk array will assume the rebuild state after the automatic activation of a hot fix drive or after a manual replacement (hot plug). The data and the redundant information are reconstructed and stored to the new drive. While in the build and rebuild states, the array drive is not redundant. You can monitor the progress of the array build/rebuild by clicking the right mouse button on the host drive and then selecting progress information. Note: User traffic on an array drive that is in the build/rebuild state, slows down the build/ rebuild process. Figure 11-148. The Build / Rebuild State 11.5.21.4 The Fail State The array drive changes to the fail state whenever a logical drive fails. Redundancy information is still present, thus allowing the remaining hard disks to continue working. This state should be eliminated as soon as possible by replacing the defective hard disk. This can be done by using a physical drive that is already connected with the controller, but not yet used for a logical drive, with the replace drive function, or by using the Hot Plug: Replace Drive function. If a hot fix drive has previously been assigned to an array drive, the ICP RAID controller will automatically replace the defective drive and start the reconstruction of the data and the redundant information. Therefore, under these circumstances the fail state is only temporary and will be eliminated by the controller itself. Use the last status from the physical drive information to analyze the cause of the drive failure. Additionally, check for retries and/or reassigns. A drive failure may also be the result of bad cabling, wrong termination or overheating. Figure 11-149. The Fail State 11.5.21.5 The Error State Should a second hard disk fail while the array drive is in the fail or rebuild state, it is not possible to continue the working session without restrictions. The disk array is still available for I/Os, but data loss and error messages on the host level are possible. Usually you must remove the array drive and build a new one. In some situations (see below) it might be possible to reset the array. 186 Software Installation and User's Guide