HowtoForge Forums | HowtoForge - Linux Howtos and Tutorials - How install a Linux Software-RAID 1 on Debian Squeeze using mdadm?

Sorry for another posting today, but I got a problem. I get the following error:
"You cannot change a partition into an extended one or vice versa. Delete it first." in 2008 you said this, I change it correctly (probably) but it's not work.

Now I notice this on a fully fresh Debian 6 64 Bit System without any manual changes:

Code:

root@nl:~# df -h

Filesystem            Size  Used Avail Use% Mounted on

/dev/mapper/nl-root   455G  736M  431G   1% /

tmpfs                1007M     0 1007M   0% /lib/init/rw

udev                 1001M  132K 1001M   1% /dev

tmpfs                1007M     0 1007M   0% /dev/shm

/dev/sda1             228M   16M  200M   8% /boot

root@nl:~#

Code:

root@nl:~# fdisk -l



Disk /dev/sda: 500.1 GB, 500107862016 bytes

255 heads, 63 sectors/track, 60801 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: 0x00018c21



   Device Boot      Start         End      Blocks   Id  System

/dev/sda1   *           1          32      248832   83  Linux

Partition 1 does not end on cylinder boundary.

/dev/sda2              32       60802   488134657    5  Extended

/dev/sda5              32       60802   488134656   8e  Linux LVM



Disk /dev/sdb: 500.1 GB, 500107862016 bytes

255 heads, 63 sectors/track, 60801 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



   Device Boot      Start         End      Blocks   Id  System

/dev/sdb1   *           1          32      248832   fd  Linux raid autodetect

Partition 1 does not end on cylinder boundary.

/dev/sdb2              32       60802   488134657    5  Extended

/dev/sdb5              32       60802   488134656   fd  Linux raid autodetect



Disk /dev/md0: 254 MB, 254791680 bytes

2 heads, 4 sectors/track, 62205 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/dm-0: 495.7 GB, 495724789760 bytes

255 heads, 63 sectors/track, 60268 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: 4123 MB, 4123000832 bytes

255 heads, 63 sectors/track, 501 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

root@nl:~#

Code:

root@nl:~# cat /proc/mdstat

Personalities : [raid1]

md0 : active (auto-read-only) raid1 sdb1[1]

      248820 blocks super 1.2 [2/1] [_U]



unused devices: <none>

root@nl:~#

mdadm was already installed, it's a pre-installed RAID 1 or? The support says explicitly that RAID software would not be automatically installed, so I ask you... :)