On Fri, 2005-07-15 at 14:16, Simon Valiquette wrote:
> Forrest Taylor a écrit :
> > I am doing some RAID scenarios on a single disc (testing purposes) on
> > RHEL4. I have some partitions as follows:
> >
> > /dev/hda5 100M
> > /dev/hda6 200M
> > /dev/hda7 200M
> > /dev/hda8 200M
> > /dev/hda9 200M
> >
> > I create a RAID 5 set with /dev/hda{5,6,7,8}. I fail/remove /dev/hda5
> > and add /dev/hda9, at which point I can grow the RAID. Running:
> >
> > mdadm -G /dev/md0 -z max
> >
>
> Have you copied the data from hda5 to hda9 with dd? If i remember,
> growing a RAID 5 that way is done by creating the missing stripes at
> the end of each disks. If the array is already in degraded mode, I am
> not sure if mdadm is able to recover from that.
I pulled hda5 and added hda9, then I waited for it to resync. It was
not in degraded mode when I tried to grow the RAID. I did not copy any
data from hda5 to hda9. In fact, I had it mounted, and I checked the
integrity of the data at each step. I did not lose any data, nor did I
lose the RAID. I don't think that I tried the grow with /dev/md0
unmounted, so it may be possible that having it mounted caused some
trouble.
Thanks,
Forrest
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