I have (4) 1 Terabyte drives.
I have created 2 mirrored raid drives md0 and md1.
md0 has the / and boot partition on it.
and md1 has the data on lvm.
On /dev/sda I also have my swap partition on it.
I have tried to test what would happen if i loose my first drive in the root partition /.
I get a blinking cursor - something is preventing the mirrored drive from kicking in and booting.
my config is below.
root@rider:~# fdisk -l
Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0005d0fd
Device Boot Start End Blocks Id System
/dev/sda1 * 1 121115 972850176 fd Linux raid autodetect
/dev/sda2 121115 121602 3909633 5 Extended
/dev/sda5 121115 121602 3909632 82 Linux swap / Solaris
Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000c8a8d
Device Boot Start End Blocks Id System
/dev/sdb1 * 1 121115 972850176 fd Linux raid autodetect
Disk /dev/sdc: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000d27a0
Device Boot Start End Blocks Id System
/dev/sdc1 1 121602 976760832 fd Linux raid autodetect
Disk /dev/sdd: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000d4cc8
Device Boot Start End Blocks Id System
/dev/sdd1 1 121602 976760832 fd Linux raid autodetect
Disk /dev/md0: 996.2 GB, 996197392384 bytes
2 heads, 4 sectors/track, 243212254 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/md0 doesn't contain a valid partition table
Disk /dev/md1: 1000.2 GB, 1000201904128 bytes
2 heads, 4 sectors/track, 244189918 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/md1 doesn't contain a valid partition table
Disk /dev/dm-0: 250.0 GB, 249997295616 bytes
255 heads, 63 sectors/track, 30393 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/dm-0 doesn't contain a valid partition table
Disk /dev/dm-1: 250.0 GB, 249997295616 bytes
255 heads, 63 sectors/track, 30393 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/dm-1 doesn't contain a valid partition table
Disk /dev/dm-2: 250.0 GB, 249997295616 bytes
255 heads, 63 sectors/track, 30393 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/dm-2 doesn't contain a valid partition table
Disk /dev/dm-3: 250.2 GB, 250207010816 bytes
255 heads, 63 sectors/track, 30419 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/dm-3 doesn't contain a valid partition table
root@rider:~#