Raid: Mdadm error
 

Hi guys,

I have a 1TB raid5 array of 3 disks running on Centos 6.2, and one disk got lost.(this a test bench of 3 usb hd)

When I try to reconnect the missing drive I get the error: ¨Error adding spare: mdadm exited with exit code 2: mdadm:option --force not valid in manage mode¨

It seems like mdadm thinks I am about to add a spare, but I am not.

I am using Red Hat disk utility 2.30.1. The array is working with clients writing to it.

Any suggestions how to solve this?

Thanks,

Dan

You should remove failed disk from array. mdadm /dev/mdX -r /dev/sdX
Then re-add.

no such device.....
 

Thanks.
I get the following error:

¨mdadm /dev/md127 -r /dev/sdc1
mdadm: hot remove failed for /dev/sdc1: No such device or address¨

Any ideas?

post mdadm -D /dev/md127 here

array failed
 

After reboot i managed to attach a new drive. During the re-sync process it lost the new drive again and the whole array became extremly slow (200Kb read/write). I have a raid one in the lab now with a new error. I make a new post.
Thanks.