Am 18.12.2011 18:51, schrieb Sam Varshavchik: > Carefully review the existing partition layout on what I presume is your good disk, /dev/sdb, and compare it with > your recreated partition table on /dev/sda. > > Hopefully, on /dev/sdb, your first partition starts on sector 2048, and not sector 63. You probably partitioned > your new /dev/sda with the first partition starting on sector 63, which does not leave enough room to install grub. > You'll have to start over. Fail and drop all your sda partitions on of all your md arrays. Create a new partition > table on sda, recreating the partitions exactly how they are on sdb, starting with sector 2048, matching the start > and the end of each partition, on sda, exactly how they exist on sdb. Then you'll be able to install grub. normally "dd if=/dev/good-disk of=/dev/replaced-disk bs=512 count=1" does this job wonderful because you have a 100% clone of the whole MBR and partition table, yes i have done this serval times on a disk layout with RAID1 for /boot, RAID10 for / and RAID10 for /mnt/data [root@srv-rhsoft:~]$ fdisk -l /dev/sda Disk /dev/sda: 2000.4 GB, 2000398934016 bytes 255 Köpfe, 63 Sektoren/Spur, 243201 Zylinder, zusammen 3907029168 Sektoren Einheiten = Sektoren von 1 × 512 = 512 Bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0000ae2c Gerät boot. Anfang Ende Blöcke Id System /dev/sda1 * 2048 1026047 512000 fd Linux raid autodetect /dev/sda2 1026048 31746047 15360000 fd Linux raid autodetect /dev/sda3 31746048 3906971647 1937612800 fd Linux raid autodetect Personalities : [raid1] [raid10] md2 : active raid10 sdc3[0] sdd3[3] sda3[4] sdb3[5] 3875222528 blocks super 1.1 512K chunks 2 near-copies [4/4] [UUUU] bitmap: 6/29 pages [24KB], 65536KB chunk md1 : active raid10 sdc2[0] sdd2[3] sda2[4] sdb2[5] 30716928 blocks super 1.1 512K chunks 2 near-copies [4/4] [UUUU] bitmap: 1/1 pages [4KB], 65536KB chunk md0 : active raid1 sdc1[0] sdd1[3] sda1[4] sdb1[5] 511988 blocks super 1.0 [4/4] [UUUU]
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