[AuckLUG] Re: Thanks, weather!

[Michael]

On 7/10/07, Justin Cook <justin at skull.co.nz> wrote:
> To answer my own question, I fixed it. I'm so proud of myself.
>
> The partition table for the drive that fell out of the array was
> damaged. I used fdisk to remove the partitions and re-added them. Then I
> figured out how to readd the device to the array with mdadm.
>
> mdadm's documentation is nasty! So for the other newbs, here's how you
> remove and add a device to the array:
>
> # mdadm /dev/md1 -r /dev/hdb1
> mdadm: hot removed /dev/hdb1
> # mdadm /dev/md1 -a /dev/hdb2
> mdadm: re-added /dev/hdb2
>
> >From there # cat /proc/mdstat will tell you how it's doing re-mirroring the array.
>
>
> Now that that's sorted, does anyone know how to check a drive's integrity?
>
>
>
> Justin Cook wrote:
> > We just had a brownout and as a result it appears one of the drives in
> > my mirror array has died. Sort of. Here's what I mean:
> >
> > [root at neko ~]# cat /proc/mdstat
> > Personalities : [raid1]
> > md1 : active raid1 hda1[0]
> >      79007552 blocks [2/1] [U_]
> >
> > md0 : active raid1 hdb2[1] hda2[0]
> >      1020032 blocks [2/2] [UU]
> >
> >
> > Damn. How does one work with mdadm? Is the best strategy just to bang
> > a replaccement drive in there? Why would one partition fail, but not
> > the second one? Should I remove the semi-functional drive immediately?
> >
> > Anyway, the mirror did its job. Hooray!
> >
>
>
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use smartctl

-- 
--
Michael