Centos
mdadm 在第二個設備 raid1 之前設置模式？
我有個問題。伺服器使用兩個磁碟softraid1。磁碟 sda 死了，換了磁碟。現在重新啟動，將分區表 sdb 複製到 sda ok。下一步將引導記錄 sdb 複製到 sda 確定。finaliy add sda in raid array retunr 總是錯誤。錯誤文本：在列出第二個設備 (/dev/md0) 之前，必須提供一個選項來設置模式。觀看命令歷史記錄。請幫我解決這個問題。mdadm –manage /dev/md0 –add /dev/sda1 命令不起作用。我該怎麼辦
root@rescue ~ # sfdisk -d /dev/sdb | sfdisk /dev/sda Checking that no-one is using this disk right now ... Warning: extended partition does not start at a cylinder boundary. DOS and Linux will interpret the contents differently. OK Disk /dev/sda: 364801 cylinders, 255 heads, 63 sectors/track sfdisk: ERROR: sector 0 does not have an msdos signature /dev/sda: unrecognized partition table type Old situation: No partitions found New situation: Units = sectors of 512 bytes, counting from 0 Device Boot Start End #sectors Id System /dev/sda1 2048 16779264 16777217 fd Linux raid autodetect /dev/sda2 16781312 17829888 1048577 fd Linux raid autodetect /dev/sda3 17831936 2165315584 2147483649 fd Linux raid autodetect /dev/sda4 2165317632 5860533167 3695215536 f W95 Ext'd (LBA) /dev/sda5 2165319680 5860531120 3695211441 fd Linux raid autodetect Warning: partition 1 does not end at a cylinder boundary Warning: partition 2 does not start at a cylinder boundary Warning: partition 2 does not end at a cylinder boundary Warning: partition 3 does not start at a cylinder boundary Warning: partition 3 does not end at a cylinder boundary Warning: partition 4 does not start at a cylinder boundary Warning: partition 4 does not end at a cylinder boundary Warning: partition 5 does not end at a cylinder boundary Warning: no primary partition is marked bootable (active) This does not matter for LILO, but the DOS MBR will not boot this disk. Successfully wrote the new partition table Re-reading the partition table ... If you created or changed a DOS partition, /dev/foo7, say, then use dd(1) to zero the first 512 bytes: dd if=/dev/zero of=/dev/foo7 bs=512 count=1 (See fdisk(8).) root@rescue ~ # fdisk -l Disk /dev/sda: 3000.6 GB, 3000592982016 bytes 255 heads, 63 sectors/track, 364801 cylinders, total 5860533168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x55555555 Device Boot Start End Blocks Id System /dev/sda1 2048 16779264 8388608+ fd Linux raid autodetect /dev/sda2 16781312 17829888 524288+ fd Linux raid autodetect /dev/sda3 17831936 2165315584 1073741824+ fd Linux raid autodetect /dev/sda4 2165317632 5860533167 1847607768 f W95 Ext'd (LBA) /dev/sda5 2165319680 5860531120 1847605720+ fd Linux raid autodetect Disk /dev/sdb: 3000.6 GB, 3000592982016 bytes 255 heads, 63 sectors/track, 364801 cylinders, total 5860533168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x0006abe2 Device Boot Start End Blocks Id System /dev/sdb1 2048 16779264 8388608+ fd Linux raid autodetect /dev/sdb2 16781312 17829888 524288+ fd Linux raid autodetect /dev/sdb3 17831936 2165315584 1073741824+ fd Linux raid autodetect /dev/sdb4 2165317632 5860533167 1847607768 f W95 Ext'd (LBA) /dev/sdb5 2165319680 5860531120 1847605720+ fd Linux raid autodetect Disk /dev/md0: 8589 MB, 8589869056 bytes 2 heads, 4 sectors/track, 2097136 cylinders, total 16777088 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Disk /dev/md0 doesn't contain a valid partition table Disk /dev/md1: 536 MB, 536805376 bytes 2 heads, 4 sectors/track, 131056 cylinders, total 1048448 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Disk /dev/md1 doesn't contain a valid partition table Disk /dev/md2: 1099.5 GB, 1099511431168 bytes 2 heads, 4 sectors/track, 268435408 cylinders, total 2147483264 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Disk /dev/md2 doesn't contain a valid partition table Disk /dev/md3: 1891.9 GB, 1891948101632 bytes 2 heads, 4 sectors/track, 461901392 cylinders, total 3695211136 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Disk /dev/md3 doesn't contain a valid partition table root@rescue ~ # dd if=/dev/sdb of=sdb.part bs=1024k count=1 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.0158913 s, 66.0 MB/s root@rescue ~ # dd if=sdb.part of=/dev/sda bs=1024k count=1 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.00358636 s, 292 MB/s root@rescue ~ # cat /proc/mdstat Personalities : [raid1] md3 : active raid1 sdb5[2] 1847605568 blocks super 1.0 [2/1] [_U] md2 : active raid1 sdb3[2] 1073741632 blocks super 1.0 [2/1] [_U] md1 : active raid1 sdb2[2] 524224 blocks super 1.0 [2/1] [_U] md0 : active raid1 sdb1[2] 8388544 blocks super 1.0 [2/1] [_U] unused devices: <none> root@rescue ~ # mdadm –manage /dev/md0 –add /dev/sda1 mdadm: An option must be given to set the mode before a second device (/dev/md0) is listed
好的，我發現了問題。正確的命令：
mdadm /dev/md0 -a /dev/sda1不是 ：
mdadm –manage /dev/md0 –add /dev/sda1最後努力！
root@rescue ~ # cat /proc/mdstat Personalities : [raid1] md3 : active raid1 sda5[3] sdb5[2] 1847605568 blocks super 1.0 [2/1] [_U] resync=DELAYED md2 : active raid1 sda3[3] sdb3[2] 1073741632 blocks super 1.0 [2/1] [_U] [>....................] recovery = 4.8% (52262208/1073741632) finish=88.1min speed=193162K/sec md1 : active raid1 sda2[3] sdb2[2] 524224 blocks super 1.0 [2/2] [UU] md0 : active raid1 sda1[3] sdb1[2] 8388544 blocks super 1.0 [2/2] [UU] unused devices: <none>