IBM 86655RY Hardware Maintenance Manual - Page 196

• channel is the channel number for the device (1, 2, or 3) • sid is the SCSI ID for the device (0-15) After the format is complete, the ServeRAID controller will be able to recognize the drive again. Recovering from a failure in a failover-environment In a failover environment, when the ServeRAID device driver is unable to send a command to the primary controller and the primary controller does not respond to a reset command, the device driver attempts to failover to the secondary controller. Note: Loose cables or defective physical drives will not cause a failover to occur. Replacing a non-hot-plug controller in a failover pair If a failed controller is not in a hot-plug PCI slot, do the following to replace it: 1. Shut down the server. 2. Replace the failed controller. 3. Reconfigure the new controller. Note: Be sure the firmware level of the new controller is the same as the controller you are replacing. Be sure to use the same Controller Name, Partner Name, and SCSI Initiator ID for the controller you are replacing. If the failed controller is in a hot-plug slot, refer to the documentation that comes with the server for instructions for replacing the controller. Guidelines for the rebuild operation • The replacement hard disk drive must have a capacity equal to or greater than the failed drive. • If the hard disk drive being rebuilt is part of a non-redundant array, the nonredundant logical drive is blocked. - You must unblock any non-redundant logical drives at the end of the rebuild operation. - If you use the ServeRAID Manager to initiate the rebuild operation, you can unblock the blocked non-redundant array when the rebuild operation completes. • Data in a logical drive with RAID level-0 is lost when the drive fails. If you backed up the data before the drive failed, you can restore the data to the new drive. General information about the rebuild operation A physical hard disk drive can enter the rebuild state if: • You physically replace a defunct drive that is part of the critical logical drive. When you physically replace a defunct drive in a critical logical drive, the ServeRAID controller rebuilds the data on the new physical drive before it changes the logical drive state back to Okay. • The ServeRAID controller adds a hot-spare or a standby hot-spare drive to the array and changes its state from Hot-Spare or Standby Hot-Spare to Rebuilding. 186 Hardware Maintenance Manual: Netfinity 7600 - Type 8665 Models 1RY, 2RY