On 02/22/2013 10:11 PM, Stone wrote: > no i have no idea why die partion table is wrong on /dev/sdc. > i can copy with dd the partion table from sdb to sdc... > example: > dd if=/dev/sdb of=sdb.part bs=512 count=1 > dd if=sdb.part of=/dev/sdc bs=512 count=1 That won't work for gpt. http://en.wikipedia.org/wiki/GUID_Partition_Table > infos: > root@ubuntu:~/raid# parted /dev/sdb print > Model: ATA WDC WD20EARS-00M (scsi) > Disk /dev/sdb: 2000GB > Sector size (logical/physical): 512B/512B > Partition Table: gpt > > Number Start End Size File system Name Flags > 1 17,4kB 2000GB 2000GB raid Uh oh. Sector 34. That start point is very bad for performance. > root@ubuntu:~/raid# parted /dev/sdc print > Model: ATA WDC WD20EARS-00M (scsi) > Disk /dev/sdc: 2000GB > Sector size (logical/physical): 512B/512B > Partition Table: gpt > > Number Start End Size File system Name Flags > 1 1049kB 2000GB 2000GB This one is aligned for proper performance, but it appears to be the wrong alignment for getting your data back. Yuck. Once you fix this partition table to get your data, take a backup of the array. Then make a new array with partitions starting at sector 2048. Or no partitions at all. Phil -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
