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Old 05-02-2009, 03:11 PM   #1
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Registered: Oct 2008
Posts: 4

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Question Cannot create /dev/md1 using mdadm after /dev/md0 is created

I am using Red Hat RHEL5.2, I am trying to set up software RAID. I use the "mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sda8 /dev/sda9" command to create md0 out of two partitions sda8 and sda9 and is successful.

I further use fdisk to create sda10, sda11 and sda12, and try to create another raid set md1 using ""mdadm --create /dev/md1 --level=5 --raid-devices=3 /dev/sda10 /dev/sda11 dev/sda12" but this time I got the following error:

mdadm: error opening /dev/md1: No such file or directory.

I try to find the answer from the Internet, but I cannot find anything concrete. There are suggestions that this is a bug of Red Hat and some suggested that the /dev/md1 should be created first, but without giving further instruction on how to do this.

Any suggestions?

Old 05-04-2009, 02:37 AM   #2
LQ Newbie
Registered: Apr 2008
Distribution: RedHat, CentOS, Ubuntu
Posts: 6

Rep: Reputation: 1
See the following post from RedHat knowledge base:

Try also posting at the relevant CentOS forum:

CentOS is 100% RedHat so you will get what you need.


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