Hello, I tried to create a raid device starting with foo:~ 1032% mdadm --create -l1 -n2 /dev/md1 /dev/sda1 missing mdadm: /dev/sda1 is too small: 0K mdadm: create aborted Others have seen this problem too. People seemed to think it might be related to the partition id, but I think the issue is something else. On a sata drive I have, ioctl calls to find the size of the first partition seem to always return 0. E.g. foo:~ 1028% fdisk /dev/sda ... Disk /dev/sda: 255 heads, 63 sectors, 38913 cylinders Units = cylinders of 16065 * 512 bytes Device Boot Start End Blocks Id System /dev/sda1 1 38000 305234968+ 83 Linux /dev/sda3 38001 38913 7333672+ 82 Linux swap foo:~ 1061% ./getsize /dev/sda Number of bytes reported: 320072933376, number of blocks reported: 625142448. foo:~ 1062% ./getsize /dev/sda1 Number of bytes reported: 0, number of blocks reported: 0. foo:~ 1063% ./getsize /dev/sda3 Number of bytes reported: 7509680640, number of blocks reported: 14667345. getsize is just a little utility to examine device sizes. The important guts are: fd = open(argv[1], O_RDONLY); ioctl(fd, BLKGETSIZE64, &nbytes); ioctl(fd, BLKGETSIZE, &nblocks); So, oddly, it is only the size of the first partition that is reported incorrectly (I tried several partitioning variations, and no, the ioctls do not report any error). I did find at least one report of someone having this problem with a different partition number, though. They claimed changing the partition id fixed the mdadm results for them, but this has not worked for me. I also happen to have several IDE drives on the same system. Sizes appear to be correctly reported for partition 1 on all of them. I'm running mdadm version 2.6.3 on kernel version 2.4.32. The sata drive is a Seagate. I don't remember all the details of my sata controller, but from my boot messages I have: sata_sil version 0.9. Does anyone happen to know what's responsible for the failure? (Yeah, I know, that question really belongs somewhere else, but I'm posting here to help with the raid issue it causes.) Thanks, Hod Greeley - 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
