Hello, We are a pioneering group in turbulence at the Polytechnic University of Madrid (torroja.dmt.upm.es), running simulations in supercomputing centers all around the world and hosting massive data in our data center that are publicly accessible. Apparently we have lost one of our partitions of 20 Tb because of a under-voltage error of a power source plus a disk failure and we are trying to fix it, but it does not look good so far. The system is setup as follow: XFS 6.1 Raid 5 (12 x 2 disks of 2 Tb each) Double disk controller managed by devmapper. What we know at this point is the next: 1) The topology of the disk is lost: the main-boot-record and the GPT are corrupted. 2) After running the testdisk utility we find 9 partitions instead of 1. 3) With gdisk we have tried to create a new main-boot-record and GPT, but it has not worked. 4) We know that the blocksize is 4096 bytes, and the current capacity of the raid is under 20 Tb, so we suspect that even if the disk-manager says that the RAID is ok, it has not reconstructed the RAID after the disk failing. We are stuck right now at this point, and help would be really appreciated in order to bring up the partition. We will be pleased to acknowledge the group in the upcoming publications. Thanks again, Juan A. Sillero _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs