On 08/18/2014 09:30 PM, Ethan Wilson wrote:
On 18/08/2014 21:26, Ram Ramesh wrote:
I had a recent disk failure in my 4x2TB raid6 and as a temporary fix I
added a 4tb drive to prevent the drive from being degraded while I
researched for a new drive.
Now that I have purchased a new drive, I am wondering if it is ok to
simply dd the first 2tb of the 4tb drive to replace the drive. I am
asking because my case/motherboard does not have another HD slot to
add the new disk
in parallel with raid6. I was thinking of shutting down the machines,
moving the 4tb memmebr and the new drive to another machine, making
image copy (only 2tb), and putting the
2tb drive back in the original machine and rebooting. Will this work?
I think it should work, if metadata is 1.1 or 1.2 . I'm not sure if it
is 1.0 .
You can also attach it via USB with an adapter, and do a replace (look
up "want_replacement") then shutdown, swap the drives, and turn on again.
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
I thought about USB. First I do not have one, but that is a small
problem to overcome. I was thinking more in terms of
performance. USB will slow things down as it is 2.0 (old MB) and dd
should be real fast (130+ MB, based on the replacement)
But, I agree that mdadm replace is safer. Do I have to remove bitmap for
replacement? I don't think so, but this is a newer operation and less
info is available, so making sure.
Ramesh
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
