DegradedArray event on FC3 after power failure

[Mark]

Hi,

I have a software RAID-1 (2 IDE drives) configuration on a Fedora Core 3 box.
After a power-failure took it down unclean, I got the below email during reboot:

------------------------------------
This is an automatically generated mail message from mdadm running on <SERVERNAME>

A DegradedArray event had been detected on md device /dev/md0.

Faithfully yours, etc.
------------------------------------

/proc/mdstat says this:

# less /proc/mdstat
Personalities : [raid1]
md0 : active raid1 hda3[1]
      193157440 blocks [2/1] [_U]

unused devices: <none>
------------------------------------

Does anybody have any pointer on what to do to fix this?

What does the mdstat result really mean?

Thanks,

MARK

[Alexander Dalloz]

Am Mi, den 03.08.2005 schrieb Mark um 20:30:
> I have a software RAID-1 (2 IDE drives) configuration on a Fedora Core 3 box.
> After a power-failure took it down unclean, I got the below email during reboot:
>
> This is an automatically generated mail message from mdadm running on <SERVERNAME>
>
> A DegradedArray event had been detected on md device /dev/md0.
> Faithfully yours, etc.
>
> /proc/mdstat says this:
>
> # less /proc/mdstat
> Personalities : [raid1]
> md0 : active raid1 hda3[1]
>       193157440 blocks [2/1] [_U]
> unused devices: <none>
>
> Does anybody have any pointer on what to do to fix this?

http://www.tldp.org/HOWTO/Software-RAID-HOWTO-6.html#ss6.3
> What does the mdstat result really mean?

It means that one of the RAID1 array partitions has failed.
> MARK

Alexander

[»Steven Ringwald«]

What it means is that one of the slices of your mirror is out of sync 
with the rest. If you are sure that there is nothing wrong with the 
drive, you can use mdadm to make the mirror reconstruct.

Steve

Mark wrote:
> Hi,
>
> I have a software RAID-1 (2 IDE drives) configuration on a Fedora Core 3 box.
> After a power-failure took it down unclean, I got the below email during reboot:
>
> This is an automatically generated mail message from mdadm running on <SERVERNAME>
>
> A DegradedArray event had been detected on md device /dev/md0.
> Faithfully yours, etc.
>
> /proc/mdstat says this:
>
> # less /proc/mdstat
> Personalities : [raid1]
> md0 : active raid1 hda3[1]
>       193157440 blocks [2/1] [_U]
> unused devices: <none>
>
> Does anybody have any pointer on what to do to fix this?
>
> What does the mdstat result really mean?
>
> Thanks,
>
> MARK

[Mark]

That worked. Thanks everybody...
> -----Original Message-----
> From: [e-mail] 
> [mailto:[e-mail]] On Behalf Of Steve Ringwald
> Sent: Wednesday, August 03, 2005 5:07 PM
> To: For users of Fedora Core releases
> Subject: Re: DegradedArray event on FC3 after power failure
>
> What it means is that one of the slices of your mirror is out of sync 
> with the rest. If you are sure that there is nothing wrong with the 
> drive, you can use mdadm to make the mirror reconstruct.
>
> Steve
>
> Mark wrote:
> > Hi,
> >
> > I have a software RAID-1 (2 IDE drives) configuration on a
>
> Fedora Core
> > 3 box. After a power-failure took it down unclean, I got the below 
> > email during reboot:
> >
> > This is an automatically generated mail message from mdadm
>
> running on
> > <SERVERNAME>
> >
> > A DegradedArray event had been detected on md device /dev/md0.
> > Faithfully yours, etc.
> >
> > /proc/mdstat says this:
> >
> > # less /proc/mdstat
> > Personalities : [raid1]
> > md0 : active raid1 hda3[1]
> >       193157440 blocks [2/1] [_U]
> > unused devices: <none>
> >
> > Does anybody have any pointer on what to do to fix this?
> >
> > What does the mdstat result really mean?
> >
> > Thanks,
> >
> > MARK
>
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