Hello,

I am trying to setup a RAID 1 configuration on my system and am running into a few problems.


I ran fdisk on the 2 disk that will be in the raid array and set the Hex Code to "fd" which from my understanding is "Raid Auto Detect" (and is needed/desired for RAID config) then I wrote the file.

When i ran the mdadm command it said that both disk are ext2fs. How is this possible when i set the file system to "fd" during partitioning?

Then I ran the command mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sdb1 /dev/sdc1 and now it is stating that the file system is Linux AutoRaid.

Which one is correct? If the first one is correct how do i change this to ext3 but still allow the 2 disk to be in a RAID configuration?

Both are correct.

If an ext2/ext3 formatted filesystem already exists in the partition you used as a raid member, then you will get the "ext3/exists" warning. Ignore it and proceed.

The fdisk partition-type is nothing more than a code and may or may not have anything to do with how the partition is actually formatted.

What you want to do is to make the raid device and then format it as ext3.

A good equivalent is probably "Linux" partitions, which are code 0x83 in the partition table, but the filesystem in that partition could be ext2, ext3, reiserfs, afs, xfs etc...