Compaq ProLiant 1850R Modifying Physical Cluster Resources in a Compaq Paralle - Page 11

Modifying Physical Cluster Resources in a Compaq Parallel Database Cluster 11 Adding or Removing Drives from a Shared Storage Array Two distinct situations exist in which you might add or remove drives from a shared storage array: • When one of the drives fails. In this case, you are simply exchanging the failed drive for a new one. • When you want to add capacity to your fibre channel storage system. In both situations, it is assumed you are employing RAID levels 1,4, or 5 for all the devices in the storage unit. IMPORTANT: The addition and removal of drives on the fibre channel array must follow certain rules that are interpreted by reading the LEDs on each drive within the storage array. Be sure to read the Fibre Channel Storage System User Guide to understand these rules. Failure to follow these rules may result in loss of data. Replacing a Failed Drive The procedure for replacing a failed drive is completed totally within the fibre channel storage system. Neither Oracle8 Parallel Server nor Windows NT Server is aware of the change, and operation of each continues without interruption. IMPORTANT: If the failed drive was not configured to use RAID levels 1,4, or 5 (i.e., your drives have no fault tolerance), you can lose some or all of the data on the failed drive. See the Fibre Channel Storage System User Guide for instructions on replacing a failed drive. ECG001/1298