Caution: Before using the clearlostdata command, call your support provider. Clears lost data blocks on an array. Use the clearlostdata command when blocks have been lost but the array does not know which blocks have been lost. In this case, the array will not be able to boot or will no longer be accessible from the network. Once connected to the array (either through a serial connection or a network connection to an IP address for a network interface), press the key and log in to a group administration account that has read-write permission (for example, the grpadmin account). The console will describe the problem and recommend that you use the clearlostdata command to try to correct the lost block problem. At the CLI prompt, enter the clearlostdata command.  The clearlostdata command may or may not be able to correct the entire lost blocks problem. In some cases, the problem may be corrected enough to boot the array. If volumes remain offline, you may not be able to recover the data on them. In these cases, you must delete the volumes, recreate them, and recover the data from a backup or replica. If the array is a member of a group and the clearlostdata command does not resolve the problem, the array will not boot and you might have to delete the member from the group. If you delete the member, the array will be reset and returned to its factory defaults. Only delete an offline member in extreme circumstances because resetting the array will remove any data on the array. See member on page 153. Format clearlostdata Example The following example shows how to log in to the grpadmin account from a console terminal and run the clearlostdata command on the array. PS Series Storage ArraysUnauthorized Access Prohibited login: grpadmin Password: Welcome to Group Manager Data loss has occurred. The array will not initialize until the error condition has been cleared. > clearlostdata cleaning luns raid firing scan complete   -joe
Lost blocks and lost configuration on PS6000 After power loss and restart, the following symptoms: No Ethernet links activeLogin via Console serial cable gives  lost blocksOld grpadmin password is remembered, but no group info present, so the member is asking to initialise the array. All data would be lost. Crisis! Is there any way to recover the array and group info and any data, even if unreliable and imcomplete?    
Lost blocks and lost configuration/array on PS6000 - Crisis