Can't add or delete a device from raid 1

Can't add or delete a device from raid 1

[me]

Hi,

I'm trying to add a partition to a raid 1 set that I built with a "missing"
partition.  But mdadm won't let me add it to md0, or remove it

platinum:~# cd /
platinum:/# mdadm /dev/md0 -r /dev/hda1
mdadm: hot remove failed for /dev/hda1: No such device or address
platinum:/# mdadm /dev/md0 -a /dev/hda1
mdadm: hot add failed for /dev/hda1: Invalid argument

I don't get this.  I had it all working, then I tried to update my kernel to
2.6.5, then the machine wouldn't boot without my interaction.  So now when
I boot to the old (working) kernel.  I'm missing on partiion on
/dev/md0.

I'm running on debian

Thanks
Jay

Re: Can't add or delete a device from raid 1

[mk423]

Hi!

On Tue, 25 May 2004 me@heyjay.com wrote:

> I'm trying to add a partition to a raid 1 set that I built with a "missing"
> partition.  But mdadm won't let me add it to md0, or remove it
>
> platinum:~# cd /
> platinum:/# mdadm /dev/md0 -r /dev/hda1
> mdadm: hot remove failed for /dev/hda1: No such device or address
> platinum:/# mdadm /dev/md0 -a /dev/hda1
> mdadm: hot add failed for /dev/hda1: Invalid argument

What do "mdadm --detail /dev/md0" and "mdadm --examine /dev/hda1"
report?

Regards,
Martin

Re: Can't add or delete a device from raid 1

[me]

>
> What do "mdadm --detail /dev/md0" and "mdadm --examine /dev/hda1"
> report?
>
> Regards,
> Martin

When I did --detail it showed the array having 2 devices, the first of which
was faulty (the bottom of the screen).  Unfortunately, I can't do
the --examine.  This morning I got frustrated and:

dd if=/dev/zero of=/dev/hda &
dd if=/dev/zero of=/dev/hdc &

I'm going to start over with clean drives

Thanks
Jay