[LUNI] oh oh, my raid it having problems

[Jay Strauss]

(top posting for your enjoyment :)

I now believe it is not my disk, but instead my IDE controller.  I
plugged a new drive in and the machine still does not see /dev/hdb, as
in:

login as: root
Using keyboard-interactive authentication.
Password:
iron:~# fdisk /dev/hdb

Unable to open /dev/hdb
iron:~#

Unless I'm wrong, which is a greater possibility than my being right,
I guess I'll have to buy a new machine.

thanks
Jay

On 8/2/07, Craig Van Tassle <craig at codestorm.org> wrote:
> Ugg bottom posters..
>
> No it looks like hda is the drive that is working.
>
> > md0 : active raid1 hda1[0]
> Notice it does not say anything about hdb.
> >       1951744 blocks [2/1] [U_]
> Also notice it says 2/1 That means 2 drives configured and one drive failed. the U_ means that the first drive of the
> array is good (Up), and the second one failed.
>
> As for copying the partision table once you get the new drive installed dd if=/dev/hda of=/dev/hdb bs=512 count=1024.
>
> That will copy your MBR and your partision table. If you dont have hot-swap drives you have to power down the box.
> To read the partision table use fdisk. Man fdisk will help out there.
>
> Remember IDE is NOT hot-swap! If you don't know if you have hotswap drives then you don't.
>
> To check for RMA you need to look at the drive. Go to the makers website and look up warranty status.
> RMA == Return Material Authorization.
>
> The SMART checks and badblocks can be done on the current system.
>
> Man smartctl and man badblocks. That will give ya all the info you need.
>
>
> Jay Strauss wrote:
> >
> > Hi Craig, thanks for advice.  Here is the output:
> >
> > iron:~# cat /proc/mdstat
> > Personalities : [raid1]
> > md0 : active raid1 hda1[0]
> >       1951744 blocks [2/1] [U_]
> >
> > md1 : active raid1 hda2[0]
> >       115266304 blocks [2/1] [U_]
> >
> > unused devices: <none>
> >
> > I'm guessing it's hda1 that is the problem.  I don't know how to print
> > the partition table.  I have 2 disks which I broke into 2 partitions.
> > On top of those I built two raid 1 devices.  On one of the devices
> > (the big one) I built an LVM.
> >
> > So how do I print the partition table?
> >
> > Do I power down the box, remove the drive, replace with new, power
> > back on and try to sync OR do I do it all while the box is running?
> >
> > What is RMA how do I check it?  Do I stick the failed drive in a
> > different computer?
> >
> > Thanks
> > Jay
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